SULPHUR AVAILABILITY IN BRAZILIAN SOILS: AVAILABLE SULPHATE-SULPHUR EVALUATION BY CHEMICAL EXTRACTANTS DISPONIBILIDADE DE ENXOFRE EM SOLOS BRASILEIROS: AVALIAÇÃO DO ENXOFRE-SULFATO DISPONÍVEL POR EXTRATORES QUÍMICOS
<!-- page { margin: 2cm } --> <p class="western" align="justify">A greenhouse experiment was carried out with surface samples of 12 soils from the States of São Paulo, Minas Gerais and Goiás (Brazil), with carbon contents ranging from 0.5 to 3.03%, su...
Ausführliche Beschreibung
Autor*in: |
Eurípedes Malavolta [verfasserIn] Huberto José Kliemann [verfasserIn] |
---|
Format: |
E-Artikel |
---|---|
Sprache: |
Englisch ; Portugiesisch |
Erschienen: |
2007 |
---|
Übergeordnetes Werk: |
In: Pesquisa Agropecuária Tropical - Universidade Federal de Goiás, 2010, 23(2007), 1, Seite 165-186 |
---|---|
Übergeordnetes Werk: |
volume:23 ; year:2007 ; number:1 ; pages:165-186 |
Links: |
---|
DOI / URN: |
10.5216/pat.v23i1.2639 |
---|
Katalog-ID: |
DOAJ024523992 |
---|
LEADER | 01000caa a22002652 4500 | ||
---|---|---|---|
001 | DOAJ024523992 | ||
003 | DE-627 | ||
005 | 20230307074942.0 | ||
007 | cr uuu---uuuuu | ||
008 | 230226s2007 xx |||||o 00| ||eng c | ||
024 | 7 | |a 10.5216/pat.v23i1.2639 |2 doi | |
035 | |a (DE-627)DOAJ024523992 | ||
035 | |a (DE-599)DOAJ22eb0055062944daa81f8b8073aaf675 | ||
040 | |a DE-627 |b ger |c DE-627 |e rakwb | ||
041 | |a eng |a por | ||
050 | 0 | |a S1-972 | |
100 | 0 | |a Eurípedes Malavolta |e verfasserin |4 aut | |
245 | 1 | 0 | |a SULPHUR AVAILABILITY IN BRAZILIAN SOILS: AVAILABLE SULPHATE-SULPHUR EVALUATION BY CHEMICAL EXTRACTANTS DISPONIBILIDADE DE ENXOFRE EM SOLOS BRASILEIROS: AVALIAÇÃO DO ENXOFRE-SULFATO DISPONÍVEL POR EXTRATORES QUÍMICOS |
264 | 1 | |c 2007 | |
336 | |a Text |b txt |2 rdacontent | ||
337 | |a Computermedien |b c |2 rdamedia | ||
338 | |a Online-Ressource |b cr |2 rdacarrier | ||
520 | |a <!-- page { margin: 2cm } --> <p class="western" align="justify">A greenhouse experiment was carried out with surface samples of 12 soils from the States of São Paulo, Minas Gerais and Goiás (Brazil), with carbon contents ranging from 0.5 to 3.03%, sulphur from 0.0104 to 0.0319% and clay from 8 to 60%. The available S-SO<sub>4</sub>= was evaluated by four chemical extractants: Ca(H<sub>2</sub>PO<sub>4</sub>,.H<sub>2</sub>O-500 ppm P in 2.0 N acetic acid: 0.5 N ammonium acetate in 0.25 N acetic acid; CaCl<sub>2</sub> 0.15% and 0.05 M HCI. Corn (<em>Zea</em> <em>mays</em> L.) was grown in two successive crops in the presence of three rates of S (0, 20 and 40 ppm S), in absence and presence of liming. Among the chemical extractants, calcium phosphate in 2.0 N acetic acid provided the best performance both in operational terms and with respect to correlation with dry matter yield and S uptake. Dilute 0.05 M HCl proved to be thoroughly inadequate due to the impossibility of giving clear uncolored extracts suitable for the turbidimetric determination of S-SO<sub>4</sub>= thereof. The critical levels were, in ppm of S: a) Ca(H<sub>2</sub>PO<sub>4</sub>)2 H<sub>2</sub>O-500 ppm P in 2.0 N acetic acid - 11; b) 0.5 N NH<sub>4</sub>OAc in 0.25 N acetic acid- 17; c) CaCl<sub>2</sub> 0.15% - 19. The critical levels of available S-SO<sub>4</sub>= in soils would be overestimated if evaluated by relative uptake of available sulphur. Turbidimetric determinations of S-SO<sub>4</sub>= have small sensibility in low concentrations of sulphates in soil extracts. One suggest the refining of analytical techniques for sulphates, including several soil/solution ratios.</p><br<<!-- @page { margin: 2cm } --> <p class="western" align="justify">Conduziu-se um experimento em casa de vegetação com amostras superficiais de 12 solos, provenientes dos Estados de São Paulo, Minas Gerais e Goiás (Brasil), com teores de carbono variando entre 0,5 e 3,03%, de enxofre entre 0,014 e 0,0319% e de argila entre 8 e 60%. Avaliou-se o S-SO<sub>4</sub>= disponível por 4 extratores químicos, Ca(H<sub>2</sub>PO<sub>4</sub>) 2.H<sub>2</sub>O-500 ppm P em ácido acético 2,0 N, NH<sub>4</sub>OAc 0,5 N em ácido acético 0,25 N, CaCl<sub>2</sub> 0,15% e HCl 0,05 M. Os solos foram submetidos a 2 cultivos sucessivos com milho (<em>Zea</em> <em>mays</em> L.) com os tratamentos: 3 doses de gesso (0, 20 e 40 ppm S), na ausência e presença de calagem. Dentre os extratores estudados, Ca(H<sub>2</sub>PO<sub>4</sub>)-500 ppm P em ácido acético 2,0 N apresentou o melhor desempenho tanto em termos operacionais quanto na correlação com a absorção de enxofre pelo milho. O extrator HCl 0,01M revelou-se inadequado por não se terem obtido extratos límpidos para a determinação turbidimétrica de S-SO<sub>4</sub>=. Os níveis críticos de S-SO4= nos solos foram: a) Ca(H<sub>2</sub>PO<sub>4</sub>)2.H2O-500 ppm P em ácido acético 2,0 N: 11 ppm; b) NH<sub>4</sub>OAc 0,5 N em ácido acético 0,25 N: 17 ppm; c) CaCl<sub>2</sub> 0,15%: 19 ppm. Os níveis críticos de S-SO<sub>4</sub>= disponíveis são superestimados quando avaliados pela absorção relativa de enxofre. A determinação turbidimétrica de S-SO<sub>4</sub>= apresenta pequena sensibilidade em baixas concentrações de sulfatos nos solos. Sugere-se o refinamento das técnicas de determinação analítica de sulfatos em solos, incluindo várias relações solo/solução de extratores.</p> | ||
653 | 0 | |a Agriculture (General) | |
700 | 0 | |a Huberto José Kliemann |e verfasserin |4 aut | |
773 | 0 | 8 | |i In |t Pesquisa Agropecuária Tropical |d Universidade Federal de Goiás, 2010 |g 23(2007), 1, Seite 165-186 |w (DE-627)518258823 |w (DE-600)2251415-6 |x 19834063 |7 nnns |
773 | 1 | 8 | |g volume:23 |g year:2007 |g number:1 |g pages:165-186 |
856 | 4 | 0 | |u https://doi.org/10.5216/pat.v23i1.2639 |z kostenfrei |
856 | 4 | 0 | |u https://doaj.org/article/22eb0055062944daa81f8b8073aaf675 |z kostenfrei |
856 | 4 | 0 | |u http://www.revistas.ufg.br/index.php/pat/article/view/2639 |z kostenfrei |
856 | 4 | 2 | |u https://doaj.org/toc/1983-4063 |y Journal toc |z kostenfrei |
912 | |a GBV_USEFLAG_A | ||
912 | |a SYSFLAG_A | ||
912 | |a GBV_DOAJ | ||
912 | |a GBV_ILN_20 | ||
912 | |a GBV_ILN_22 | ||
912 | |a GBV_ILN_24 | ||
912 | |a GBV_ILN_31 | ||
912 | |a GBV_ILN_39 | ||
912 | |a GBV_ILN_40 | ||
912 | |a GBV_ILN_60 | ||
912 | |a GBV_ILN_62 | ||
912 | |a GBV_ILN_63 | ||
912 | |a GBV_ILN_65 | ||
912 | |a GBV_ILN_69 | ||
912 | |a GBV_ILN_70 | ||
912 | |a GBV_ILN_73 | ||
912 | |a GBV_ILN_95 | ||
912 | |a GBV_ILN_105 | ||
912 | |a GBV_ILN_110 | ||
912 | |a GBV_ILN_151 | ||
912 | |a GBV_ILN_161 | ||
912 | |a GBV_ILN_213 | ||
912 | |a GBV_ILN_230 | ||
912 | |a GBV_ILN_285 | ||
912 | |a GBV_ILN_293 | ||
912 | |a GBV_ILN_602 | ||
912 | |a GBV_ILN_2014 | ||
912 | |a GBV_ILN_4012 | ||
912 | |a GBV_ILN_4037 | ||
912 | |a GBV_ILN_4112 | ||
912 | |a GBV_ILN_4125 | ||
912 | |a GBV_ILN_4126 | ||
912 | |a GBV_ILN_4249 | ||
912 | |a GBV_ILN_4305 | ||
912 | |a GBV_ILN_4306 | ||
912 | |a GBV_ILN_4307 | ||
912 | |a GBV_ILN_4313 | ||
912 | |a GBV_ILN_4322 | ||
912 | |a GBV_ILN_4323 | ||
912 | |a GBV_ILN_4324 | ||
912 | |a GBV_ILN_4325 | ||
912 | |a GBV_ILN_4367 | ||
912 | |a GBV_ILN_4700 | ||
951 | |a AR | ||
952 | |d 23 |j 2007 |e 1 |h 165-186 |
author_variant |
e m em h j k hjk |
---|---|
matchkey_str |
article:19834063:2007----::upuaalbltibaiinolaalbeupaeupueautobceiaetatnsipnbldddexfemoobaiersvla |
hierarchy_sort_str |
2007 |
callnumber-subject-code |
S |
publishDate |
2007 |
allfields |
10.5216/pat.v23i1.2639 doi (DE-627)DOAJ024523992 (DE-599)DOAJ22eb0055062944daa81f8b8073aaf675 DE-627 ger DE-627 rakwb eng por S1-972 Eurípedes Malavolta verfasserin aut SULPHUR AVAILABILITY IN BRAZILIAN SOILS: AVAILABLE SULPHATE-SULPHUR EVALUATION BY CHEMICAL EXTRACTANTS DISPONIBILIDADE DE ENXOFRE EM SOLOS BRASILEIROS: AVALIAÇÃO DO ENXOFRE-SULFATO DISPONÍVEL POR EXTRATORES QUÍMICOS 2007 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier <!-- page { margin: 2cm } --> <p class="western" align="justify">A greenhouse experiment was carried out with surface samples of 12 soils from the States of São Paulo, Minas Gerais and Goiás (Brazil), with carbon contents ranging from 0.5 to 3.03%, sulphur from 0.0104 to 0.0319% and clay from 8 to 60%. The available S-SO<sub>4</sub>= was evaluated by four chemical extractants: Ca(H<sub>2</sub>PO<sub>4</sub>,.H<sub>2</sub>O-500 ppm P in 2.0 N acetic acid: 0.5 N ammonium acetate in 0.25 N acetic acid; CaCl<sub>2</sub> 0.15% and 0.05 M HCI. Corn (<em>Zea</em> <em>mays</em> L.) was grown in two successive crops in the presence of three rates of S (0, 20 and 40 ppm S), in absence and presence of liming. Among the chemical extractants, calcium phosphate in 2.0 N acetic acid provided the best performance both in operational terms and with respect to correlation with dry matter yield and S uptake. Dilute 0.05 M HCl proved to be thoroughly inadequate due to the impossibility of giving clear uncolored extracts suitable for the turbidimetric determination of S-SO<sub>4</sub>= thereof. The critical levels were, in ppm of S: a) Ca(H<sub>2</sub>PO<sub>4</sub>)2 H<sub>2</sub>O-500 ppm P in 2.0 N acetic acid - 11; b) 0.5 N NH<sub>4</sub>OAc in 0.25 N acetic acid- 17; c) CaCl<sub>2</sub> 0.15% - 19. The critical levels of available S-SO<sub>4</sub>= in soils would be overestimated if evaluated by relative uptake of available sulphur. Turbidimetric determinations of S-SO<sub>4</sub>= have small sensibility in low concentrations of sulphates in soil extracts. One suggest the refining of analytical techniques for sulphates, including several soil/solution ratios.</p><br<<!-- @page { margin: 2cm } --> <p class="western" align="justify">Conduziu-se um experimento em casa de vegetação com amostras superficiais de 12 solos, provenientes dos Estados de São Paulo, Minas Gerais e Goiás (Brasil), com teores de carbono variando entre 0,5 e 3,03%, de enxofre entre 0,014 e 0,0319% e de argila entre 8 e 60%. Avaliou-se o S-SO<sub>4</sub>= disponível por 4 extratores químicos, Ca(H<sub>2</sub>PO<sub>4</sub>) 2.H<sub>2</sub>O-500 ppm P em ácido acético 2,0 N, NH<sub>4</sub>OAc 0,5 N em ácido acético 0,25 N, CaCl<sub>2</sub> 0,15% e HCl 0,05 M. Os solos foram submetidos a 2 cultivos sucessivos com milho (<em>Zea</em> <em>mays</em> L.) com os tratamentos: 3 doses de gesso (0, 20 e 40 ppm S), na ausência e presença de calagem. Dentre os extratores estudados, Ca(H<sub>2</sub>PO<sub>4</sub>)-500 ppm P em ácido acético 2,0 N apresentou o melhor desempenho tanto em termos operacionais quanto na correlação com a absorção de enxofre pelo milho. O extrator HCl 0,01M revelou-se inadequado por não se terem obtido extratos límpidos para a determinação turbidimétrica de S-SO<sub>4</sub>=. Os níveis críticos de S-SO4= nos solos foram: a) Ca(H<sub>2</sub>PO<sub>4</sub>)2.H2O-500 ppm P em ácido acético 2,0 N: 11 ppm; b) NH<sub>4</sub>OAc 0,5 N em ácido acético 0,25 N: 17 ppm; c) CaCl<sub>2</sub> 0,15%: 19 ppm. Os níveis críticos de S-SO<sub>4</sub>= disponíveis são superestimados quando avaliados pela absorção relativa de enxofre. A determinação turbidimétrica de S-SO<sub>4</sub>= apresenta pequena sensibilidade em baixas concentrações de sulfatos nos solos. Sugere-se o refinamento das técnicas de determinação analítica de sulfatos em solos, incluindo várias relações solo/solução de extratores.</p> Agriculture (General) Huberto José Kliemann verfasserin aut In Pesquisa Agropecuária Tropical Universidade Federal de Goiás, 2010 23(2007), 1, Seite 165-186 (DE-627)518258823 (DE-600)2251415-6 19834063 nnns volume:23 year:2007 number:1 pages:165-186 https://doi.org/10.5216/pat.v23i1.2639 kostenfrei https://doaj.org/article/22eb0055062944daa81f8b8073aaf675 kostenfrei http://www.revistas.ufg.br/index.php/pat/article/view/2639 kostenfrei https://doaj.org/toc/1983-4063 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4367 GBV_ILN_4700 AR 23 2007 1 165-186 |
spelling |
10.5216/pat.v23i1.2639 doi (DE-627)DOAJ024523992 (DE-599)DOAJ22eb0055062944daa81f8b8073aaf675 DE-627 ger DE-627 rakwb eng por S1-972 Eurípedes Malavolta verfasserin aut SULPHUR AVAILABILITY IN BRAZILIAN SOILS: AVAILABLE SULPHATE-SULPHUR EVALUATION BY CHEMICAL EXTRACTANTS DISPONIBILIDADE DE ENXOFRE EM SOLOS BRASILEIROS: AVALIAÇÃO DO ENXOFRE-SULFATO DISPONÍVEL POR EXTRATORES QUÍMICOS 2007 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier <!-- page { margin: 2cm } --> <p class="western" align="justify">A greenhouse experiment was carried out with surface samples of 12 soils from the States of São Paulo, Minas Gerais and Goiás (Brazil), with carbon contents ranging from 0.5 to 3.03%, sulphur from 0.0104 to 0.0319% and clay from 8 to 60%. The available S-SO<sub>4</sub>= was evaluated by four chemical extractants: Ca(H<sub>2</sub>PO<sub>4</sub>,.H<sub>2</sub>O-500 ppm P in 2.0 N acetic acid: 0.5 N ammonium acetate in 0.25 N acetic acid; CaCl<sub>2</sub> 0.15% and 0.05 M HCI. Corn (<em>Zea</em> <em>mays</em> L.) was grown in two successive crops in the presence of three rates of S (0, 20 and 40 ppm S), in absence and presence of liming. Among the chemical extractants, calcium phosphate in 2.0 N acetic acid provided the best performance both in operational terms and with respect to correlation with dry matter yield and S uptake. Dilute 0.05 M HCl proved to be thoroughly inadequate due to the impossibility of giving clear uncolored extracts suitable for the turbidimetric determination of S-SO<sub>4</sub>= thereof. The critical levels were, in ppm of S: a) Ca(H<sub>2</sub>PO<sub>4</sub>)2 H<sub>2</sub>O-500 ppm P in 2.0 N acetic acid - 11; b) 0.5 N NH<sub>4</sub>OAc in 0.25 N acetic acid- 17; c) CaCl<sub>2</sub> 0.15% - 19. The critical levels of available S-SO<sub>4</sub>= in soils would be overestimated if evaluated by relative uptake of available sulphur. Turbidimetric determinations of S-SO<sub>4</sub>= have small sensibility in low concentrations of sulphates in soil extracts. One suggest the refining of analytical techniques for sulphates, including several soil/solution ratios.</p><br<<!-- @page { margin: 2cm } --> <p class="western" align="justify">Conduziu-se um experimento em casa de vegetação com amostras superficiais de 12 solos, provenientes dos Estados de São Paulo, Minas Gerais e Goiás (Brasil), com teores de carbono variando entre 0,5 e 3,03%, de enxofre entre 0,014 e 0,0319% e de argila entre 8 e 60%. Avaliou-se o S-SO<sub>4</sub>= disponível por 4 extratores químicos, Ca(H<sub>2</sub>PO<sub>4</sub>) 2.H<sub>2</sub>O-500 ppm P em ácido acético 2,0 N, NH<sub>4</sub>OAc 0,5 N em ácido acético 0,25 N, CaCl<sub>2</sub> 0,15% e HCl 0,05 M. Os solos foram submetidos a 2 cultivos sucessivos com milho (<em>Zea</em> <em>mays</em> L.) com os tratamentos: 3 doses de gesso (0, 20 e 40 ppm S), na ausência e presença de calagem. Dentre os extratores estudados, Ca(H<sub>2</sub>PO<sub>4</sub>)-500 ppm P em ácido acético 2,0 N apresentou o melhor desempenho tanto em termos operacionais quanto na correlação com a absorção de enxofre pelo milho. O extrator HCl 0,01M revelou-se inadequado por não se terem obtido extratos límpidos para a determinação turbidimétrica de S-SO<sub>4</sub>=. Os níveis críticos de S-SO4= nos solos foram: a) Ca(H<sub>2</sub>PO<sub>4</sub>)2.H2O-500 ppm P em ácido acético 2,0 N: 11 ppm; b) NH<sub>4</sub>OAc 0,5 N em ácido acético 0,25 N: 17 ppm; c) CaCl<sub>2</sub> 0,15%: 19 ppm. Os níveis críticos de S-SO<sub>4</sub>= disponíveis são superestimados quando avaliados pela absorção relativa de enxofre. A determinação turbidimétrica de S-SO<sub>4</sub>= apresenta pequena sensibilidade em baixas concentrações de sulfatos nos solos. Sugere-se o refinamento das técnicas de determinação analítica de sulfatos em solos, incluindo várias relações solo/solução de extratores.</p> Agriculture (General) Huberto José Kliemann verfasserin aut In Pesquisa Agropecuária Tropical Universidade Federal de Goiás, 2010 23(2007), 1, Seite 165-186 (DE-627)518258823 (DE-600)2251415-6 19834063 nnns volume:23 year:2007 number:1 pages:165-186 https://doi.org/10.5216/pat.v23i1.2639 kostenfrei https://doaj.org/article/22eb0055062944daa81f8b8073aaf675 kostenfrei http://www.revistas.ufg.br/index.php/pat/article/view/2639 kostenfrei https://doaj.org/toc/1983-4063 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4367 GBV_ILN_4700 AR 23 2007 1 165-186 |
allfields_unstemmed |
10.5216/pat.v23i1.2639 doi (DE-627)DOAJ024523992 (DE-599)DOAJ22eb0055062944daa81f8b8073aaf675 DE-627 ger DE-627 rakwb eng por S1-972 Eurípedes Malavolta verfasserin aut SULPHUR AVAILABILITY IN BRAZILIAN SOILS: AVAILABLE SULPHATE-SULPHUR EVALUATION BY CHEMICAL EXTRACTANTS DISPONIBILIDADE DE ENXOFRE EM SOLOS BRASILEIROS: AVALIAÇÃO DO ENXOFRE-SULFATO DISPONÍVEL POR EXTRATORES QUÍMICOS 2007 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier <!-- page { margin: 2cm } --> <p class="western" align="justify">A greenhouse experiment was carried out with surface samples of 12 soils from the States of São Paulo, Minas Gerais and Goiás (Brazil), with carbon contents ranging from 0.5 to 3.03%, sulphur from 0.0104 to 0.0319% and clay from 8 to 60%. The available S-SO<sub>4</sub>= was evaluated by four chemical extractants: Ca(H<sub>2</sub>PO<sub>4</sub>,.H<sub>2</sub>O-500 ppm P in 2.0 N acetic acid: 0.5 N ammonium acetate in 0.25 N acetic acid; CaCl<sub>2</sub> 0.15% and 0.05 M HCI. Corn (<em>Zea</em> <em>mays</em> L.) was grown in two successive crops in the presence of three rates of S (0, 20 and 40 ppm S), in absence and presence of liming. Among the chemical extractants, calcium phosphate in 2.0 N acetic acid provided the best performance both in operational terms and with respect to correlation with dry matter yield and S uptake. Dilute 0.05 M HCl proved to be thoroughly inadequate due to the impossibility of giving clear uncolored extracts suitable for the turbidimetric determination of S-SO<sub>4</sub>= thereof. The critical levels were, in ppm of S: a) Ca(H<sub>2</sub>PO<sub>4</sub>)2 H<sub>2</sub>O-500 ppm P in 2.0 N acetic acid - 11; b) 0.5 N NH<sub>4</sub>OAc in 0.25 N acetic acid- 17; c) CaCl<sub>2</sub> 0.15% - 19. The critical levels of available S-SO<sub>4</sub>= in soils would be overestimated if evaluated by relative uptake of available sulphur. Turbidimetric determinations of S-SO<sub>4</sub>= have small sensibility in low concentrations of sulphates in soil extracts. One suggest the refining of analytical techniques for sulphates, including several soil/solution ratios.</p><br<<!-- @page { margin: 2cm } --> <p class="western" align="justify">Conduziu-se um experimento em casa de vegetação com amostras superficiais de 12 solos, provenientes dos Estados de São Paulo, Minas Gerais e Goiás (Brasil), com teores de carbono variando entre 0,5 e 3,03%, de enxofre entre 0,014 e 0,0319% e de argila entre 8 e 60%. Avaliou-se o S-SO<sub>4</sub>= disponível por 4 extratores químicos, Ca(H<sub>2</sub>PO<sub>4</sub>) 2.H<sub>2</sub>O-500 ppm P em ácido acético 2,0 N, NH<sub>4</sub>OAc 0,5 N em ácido acético 0,25 N, CaCl<sub>2</sub> 0,15% e HCl 0,05 M. Os solos foram submetidos a 2 cultivos sucessivos com milho (<em>Zea</em> <em>mays</em> L.) com os tratamentos: 3 doses de gesso (0, 20 e 40 ppm S), na ausência e presença de calagem. Dentre os extratores estudados, Ca(H<sub>2</sub>PO<sub>4</sub>)-500 ppm P em ácido acético 2,0 N apresentou o melhor desempenho tanto em termos operacionais quanto na correlação com a absorção de enxofre pelo milho. O extrator HCl 0,01M revelou-se inadequado por não se terem obtido extratos límpidos para a determinação turbidimétrica de S-SO<sub>4</sub>=. Os níveis críticos de S-SO4= nos solos foram: a) Ca(H<sub>2</sub>PO<sub>4</sub>)2.H2O-500 ppm P em ácido acético 2,0 N: 11 ppm; b) NH<sub>4</sub>OAc 0,5 N em ácido acético 0,25 N: 17 ppm; c) CaCl<sub>2</sub> 0,15%: 19 ppm. Os níveis críticos de S-SO<sub>4</sub>= disponíveis são superestimados quando avaliados pela absorção relativa de enxofre. A determinação turbidimétrica de S-SO<sub>4</sub>= apresenta pequena sensibilidade em baixas concentrações de sulfatos nos solos. Sugere-se o refinamento das técnicas de determinação analítica de sulfatos em solos, incluindo várias relações solo/solução de extratores.</p> Agriculture (General) Huberto José Kliemann verfasserin aut In Pesquisa Agropecuária Tropical Universidade Federal de Goiás, 2010 23(2007), 1, Seite 165-186 (DE-627)518258823 (DE-600)2251415-6 19834063 nnns volume:23 year:2007 number:1 pages:165-186 https://doi.org/10.5216/pat.v23i1.2639 kostenfrei https://doaj.org/article/22eb0055062944daa81f8b8073aaf675 kostenfrei http://www.revistas.ufg.br/index.php/pat/article/view/2639 kostenfrei https://doaj.org/toc/1983-4063 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4367 GBV_ILN_4700 AR 23 2007 1 165-186 |
allfieldsGer |
10.5216/pat.v23i1.2639 doi (DE-627)DOAJ024523992 (DE-599)DOAJ22eb0055062944daa81f8b8073aaf675 DE-627 ger DE-627 rakwb eng por S1-972 Eurípedes Malavolta verfasserin aut SULPHUR AVAILABILITY IN BRAZILIAN SOILS: AVAILABLE SULPHATE-SULPHUR EVALUATION BY CHEMICAL EXTRACTANTS DISPONIBILIDADE DE ENXOFRE EM SOLOS BRASILEIROS: AVALIAÇÃO DO ENXOFRE-SULFATO DISPONÍVEL POR EXTRATORES QUÍMICOS 2007 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier <!-- page { margin: 2cm } --> <p class="western" align="justify">A greenhouse experiment was carried out with surface samples of 12 soils from the States of São Paulo, Minas Gerais and Goiás (Brazil), with carbon contents ranging from 0.5 to 3.03%, sulphur from 0.0104 to 0.0319% and clay from 8 to 60%. The available S-SO<sub>4</sub>= was evaluated by four chemical extractants: Ca(H<sub>2</sub>PO<sub>4</sub>,.H<sub>2</sub>O-500 ppm P in 2.0 N acetic acid: 0.5 N ammonium acetate in 0.25 N acetic acid; CaCl<sub>2</sub> 0.15% and 0.05 M HCI. Corn (<em>Zea</em> <em>mays</em> L.) was grown in two successive crops in the presence of three rates of S (0, 20 and 40 ppm S), in absence and presence of liming. Among the chemical extractants, calcium phosphate in 2.0 N acetic acid provided the best performance both in operational terms and with respect to correlation with dry matter yield and S uptake. Dilute 0.05 M HCl proved to be thoroughly inadequate due to the impossibility of giving clear uncolored extracts suitable for the turbidimetric determination of S-SO<sub>4</sub>= thereof. The critical levels were, in ppm of S: a) Ca(H<sub>2</sub>PO<sub>4</sub>)2 H<sub>2</sub>O-500 ppm P in 2.0 N acetic acid - 11; b) 0.5 N NH<sub>4</sub>OAc in 0.25 N acetic acid- 17; c) CaCl<sub>2</sub> 0.15% - 19. The critical levels of available S-SO<sub>4</sub>= in soils would be overestimated if evaluated by relative uptake of available sulphur. Turbidimetric determinations of S-SO<sub>4</sub>= have small sensibility in low concentrations of sulphates in soil extracts. One suggest the refining of analytical techniques for sulphates, including several soil/solution ratios.</p><br<<!-- @page { margin: 2cm } --> <p class="western" align="justify">Conduziu-se um experimento em casa de vegetação com amostras superficiais de 12 solos, provenientes dos Estados de São Paulo, Minas Gerais e Goiás (Brasil), com teores de carbono variando entre 0,5 e 3,03%, de enxofre entre 0,014 e 0,0319% e de argila entre 8 e 60%. Avaliou-se o S-SO<sub>4</sub>= disponível por 4 extratores químicos, Ca(H<sub>2</sub>PO<sub>4</sub>) 2.H<sub>2</sub>O-500 ppm P em ácido acético 2,0 N, NH<sub>4</sub>OAc 0,5 N em ácido acético 0,25 N, CaCl<sub>2</sub> 0,15% e HCl 0,05 M. Os solos foram submetidos a 2 cultivos sucessivos com milho (<em>Zea</em> <em>mays</em> L.) com os tratamentos: 3 doses de gesso (0, 20 e 40 ppm S), na ausência e presença de calagem. Dentre os extratores estudados, Ca(H<sub>2</sub>PO<sub>4</sub>)-500 ppm P em ácido acético 2,0 N apresentou o melhor desempenho tanto em termos operacionais quanto na correlação com a absorção de enxofre pelo milho. O extrator HCl 0,01M revelou-se inadequado por não se terem obtido extratos límpidos para a determinação turbidimétrica de S-SO<sub>4</sub>=. Os níveis críticos de S-SO4= nos solos foram: a) Ca(H<sub>2</sub>PO<sub>4</sub>)2.H2O-500 ppm P em ácido acético 2,0 N: 11 ppm; b) NH<sub>4</sub>OAc 0,5 N em ácido acético 0,25 N: 17 ppm; c) CaCl<sub>2</sub> 0,15%: 19 ppm. Os níveis críticos de S-SO<sub>4</sub>= disponíveis são superestimados quando avaliados pela absorção relativa de enxofre. A determinação turbidimétrica de S-SO<sub>4</sub>= apresenta pequena sensibilidade em baixas concentrações de sulfatos nos solos. Sugere-se o refinamento das técnicas de determinação analítica de sulfatos em solos, incluindo várias relações solo/solução de extratores.</p> Agriculture (General) Huberto José Kliemann verfasserin aut In Pesquisa Agropecuária Tropical Universidade Federal de Goiás, 2010 23(2007), 1, Seite 165-186 (DE-627)518258823 (DE-600)2251415-6 19834063 nnns volume:23 year:2007 number:1 pages:165-186 https://doi.org/10.5216/pat.v23i1.2639 kostenfrei https://doaj.org/article/22eb0055062944daa81f8b8073aaf675 kostenfrei http://www.revistas.ufg.br/index.php/pat/article/view/2639 kostenfrei https://doaj.org/toc/1983-4063 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4367 GBV_ILN_4700 AR 23 2007 1 165-186 |
allfieldsSound |
10.5216/pat.v23i1.2639 doi (DE-627)DOAJ024523992 (DE-599)DOAJ22eb0055062944daa81f8b8073aaf675 DE-627 ger DE-627 rakwb eng por S1-972 Eurípedes Malavolta verfasserin aut SULPHUR AVAILABILITY IN BRAZILIAN SOILS: AVAILABLE SULPHATE-SULPHUR EVALUATION BY CHEMICAL EXTRACTANTS DISPONIBILIDADE DE ENXOFRE EM SOLOS BRASILEIROS: AVALIAÇÃO DO ENXOFRE-SULFATO DISPONÍVEL POR EXTRATORES QUÍMICOS 2007 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier <!-- page { margin: 2cm } --> <p class="western" align="justify">A greenhouse experiment was carried out with surface samples of 12 soils from the States of São Paulo, Minas Gerais and Goiás (Brazil), with carbon contents ranging from 0.5 to 3.03%, sulphur from 0.0104 to 0.0319% and clay from 8 to 60%. The available S-SO<sub>4</sub>= was evaluated by four chemical extractants: Ca(H<sub>2</sub>PO<sub>4</sub>,.H<sub>2</sub>O-500 ppm P in 2.0 N acetic acid: 0.5 N ammonium acetate in 0.25 N acetic acid; CaCl<sub>2</sub> 0.15% and 0.05 M HCI. Corn (<em>Zea</em> <em>mays</em> L.) was grown in two successive crops in the presence of three rates of S (0, 20 and 40 ppm S), in absence and presence of liming. Among the chemical extractants, calcium phosphate in 2.0 N acetic acid provided the best performance both in operational terms and with respect to correlation with dry matter yield and S uptake. Dilute 0.05 M HCl proved to be thoroughly inadequate due to the impossibility of giving clear uncolored extracts suitable for the turbidimetric determination of S-SO<sub>4</sub>= thereof. The critical levels were, in ppm of S: a) Ca(H<sub>2</sub>PO<sub>4</sub>)2 H<sub>2</sub>O-500 ppm P in 2.0 N acetic acid - 11; b) 0.5 N NH<sub>4</sub>OAc in 0.25 N acetic acid- 17; c) CaCl<sub>2</sub> 0.15% - 19. The critical levels of available S-SO<sub>4</sub>= in soils would be overestimated if evaluated by relative uptake of available sulphur. Turbidimetric determinations of S-SO<sub>4</sub>= have small sensibility in low concentrations of sulphates in soil extracts. One suggest the refining of analytical techniques for sulphates, including several soil/solution ratios.</p><br<<!-- @page { margin: 2cm } --> <p class="western" align="justify">Conduziu-se um experimento em casa de vegetação com amostras superficiais de 12 solos, provenientes dos Estados de São Paulo, Minas Gerais e Goiás (Brasil), com teores de carbono variando entre 0,5 e 3,03%, de enxofre entre 0,014 e 0,0319% e de argila entre 8 e 60%. Avaliou-se o S-SO<sub>4</sub>= disponível por 4 extratores químicos, Ca(H<sub>2</sub>PO<sub>4</sub>) 2.H<sub>2</sub>O-500 ppm P em ácido acético 2,0 N, NH<sub>4</sub>OAc 0,5 N em ácido acético 0,25 N, CaCl<sub>2</sub> 0,15% e HCl 0,05 M. Os solos foram submetidos a 2 cultivos sucessivos com milho (<em>Zea</em> <em>mays</em> L.) com os tratamentos: 3 doses de gesso (0, 20 e 40 ppm S), na ausência e presença de calagem. Dentre os extratores estudados, Ca(H<sub>2</sub>PO<sub>4</sub>)-500 ppm P em ácido acético 2,0 N apresentou o melhor desempenho tanto em termos operacionais quanto na correlação com a absorção de enxofre pelo milho. O extrator HCl 0,01M revelou-se inadequado por não se terem obtido extratos límpidos para a determinação turbidimétrica de S-SO<sub>4</sub>=. Os níveis críticos de S-SO4= nos solos foram: a) Ca(H<sub>2</sub>PO<sub>4</sub>)2.H2O-500 ppm P em ácido acético 2,0 N: 11 ppm; b) NH<sub>4</sub>OAc 0,5 N em ácido acético 0,25 N: 17 ppm; c) CaCl<sub>2</sub> 0,15%: 19 ppm. Os níveis críticos de S-SO<sub>4</sub>= disponíveis são superestimados quando avaliados pela absorção relativa de enxofre. A determinação turbidimétrica de S-SO<sub>4</sub>= apresenta pequena sensibilidade em baixas concentrações de sulfatos nos solos. Sugere-se o refinamento das técnicas de determinação analítica de sulfatos em solos, incluindo várias relações solo/solução de extratores.</p> Agriculture (General) Huberto José Kliemann verfasserin aut In Pesquisa Agropecuária Tropical Universidade Federal de Goiás, 2010 23(2007), 1, Seite 165-186 (DE-627)518258823 (DE-600)2251415-6 19834063 nnns volume:23 year:2007 number:1 pages:165-186 https://doi.org/10.5216/pat.v23i1.2639 kostenfrei https://doaj.org/article/22eb0055062944daa81f8b8073aaf675 kostenfrei http://www.revistas.ufg.br/index.php/pat/article/view/2639 kostenfrei https://doaj.org/toc/1983-4063 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4367 GBV_ILN_4700 AR 23 2007 1 165-186 |
language |
English Portuguese |
source |
In Pesquisa Agropecuária Tropical 23(2007), 1, Seite 165-186 volume:23 year:2007 number:1 pages:165-186 |
sourceStr |
In Pesquisa Agropecuária Tropical 23(2007), 1, Seite 165-186 volume:23 year:2007 number:1 pages:165-186 |
format_phy_str_mv |
Article |
institution |
findex.gbv.de |
topic_facet |
Agriculture (General) |
isfreeaccess_bool |
true |
container_title |
Pesquisa Agropecuária Tropical |
authorswithroles_txt_mv |
Eurípedes Malavolta @@aut@@ Huberto José Kliemann @@aut@@ |
publishDateDaySort_date |
2007-01-01T00:00:00Z |
hierarchy_top_id |
518258823 |
id |
DOAJ024523992 |
language_de |
englisch portugiesisch |
fullrecord |
<?xml version="1.0" encoding="UTF-8"?><collection xmlns="http://www.loc.gov/MARC21/slim"><record><leader>01000caa a22002652 4500</leader><controlfield tag="001">DOAJ024523992</controlfield><controlfield tag="003">DE-627</controlfield><controlfield tag="005">20230307074942.0</controlfield><controlfield tag="007">cr uuu---uuuuu</controlfield><controlfield tag="008">230226s2007 xx |||||o 00| ||eng c</controlfield><datafield tag="024" ind1="7" ind2=" "><subfield code="a">10.5216/pat.v23i1.2639</subfield><subfield code="2">doi</subfield></datafield><datafield tag="035" ind1=" " ind2=" "><subfield code="a">(DE-627)DOAJ024523992</subfield></datafield><datafield tag="035" ind1=" " ind2=" "><subfield code="a">(DE-599)DOAJ22eb0055062944daa81f8b8073aaf675</subfield></datafield><datafield tag="040" ind1=" " ind2=" "><subfield code="a">DE-627</subfield><subfield code="b">ger</subfield><subfield code="c">DE-627</subfield><subfield code="e">rakwb</subfield></datafield><datafield tag="041" ind1=" " ind2=" "><subfield code="a">eng</subfield><subfield code="a">por</subfield></datafield><datafield tag="050" ind1=" " ind2="0"><subfield code="a">S1-972</subfield></datafield><datafield tag="100" ind1="0" ind2=" "><subfield code="a">Eurípedes Malavolta</subfield><subfield code="e">verfasserin</subfield><subfield code="4">aut</subfield></datafield><datafield tag="245" ind1="1" ind2="0"><subfield code="a">SULPHUR AVAILABILITY IN BRAZILIAN SOILS: AVAILABLE SULPHATE-SULPHUR EVALUATION BY CHEMICAL EXTRACTANTS DISPONIBILIDADE DE ENXOFRE EM SOLOS BRASILEIROS: AVALIAÇÃO DO ENXOFRE-SULFATO DISPONÍVEL POR EXTRATORES QUÍMICOS</subfield></datafield><datafield tag="264" ind1=" " ind2="1"><subfield code="c">2007</subfield></datafield><datafield tag="336" ind1=" " ind2=" "><subfield code="a">Text</subfield><subfield code="b">txt</subfield><subfield code="2">rdacontent</subfield></datafield><datafield tag="337" ind1=" " ind2=" "><subfield code="a">Computermedien</subfield><subfield code="b">c</subfield><subfield code="2">rdamedia</subfield></datafield><datafield tag="338" ind1=" " ind2=" "><subfield code="a">Online-Ressource</subfield><subfield code="b">cr</subfield><subfield code="2">rdacarrier</subfield></datafield><datafield tag="520" ind1=" " ind2=" "><subfield code="a">&lt;!-- page { margin: 2cm } --&gt; &lt;p class="western" align="justify"&gt;A greenhouse experiment was carried out with surface samples of 12 soils from the States of São Paulo, Minas Gerais and Goiás (Brazil), with carbon contents ranging from 0.5 to 3.03%, sulphur from 0.0104 to 0.0319% and clay from 8 to 60%. The available S-SO&lt;sub&gt;4&lt;/sub&gt;= was evaluated by four chemical extractants: Ca(H&lt;sub&gt;2&lt;/sub&gt;PO&lt;sub&gt;4&lt;/sub&gt;,.H&lt;sub&gt;2&lt;/sub&gt;O-500 ppm P in 2.0 N acetic acid: 0.5 N ammonium acetate in 0.25 N acetic acid; CaCl&lt;sub&gt;2&lt;/sub&gt; 0.15% and 0.05 M HCI. Corn (&lt;em&gt;Zea&lt;/em&gt; &lt;em&gt;mays&lt;/em&gt; L.) was grown in two successive crops in the presence of three rates of S (0, 20 and 40 ppm S), in absence and presence of liming. Among the chemical extractants, calcium phosphate in 2.0 N acetic acid provided the best performance both in operational terms and with respect to correlation with dry matter yield and S uptake. Dilute 0.05 M HCl proved to be thoroughly inadequate due to the impossibility of giving clear uncolored extracts suitable for the turbidimetric determination of S-SO&lt;sub&gt;4&lt;/sub&gt;= thereof. The critical levels were, in ppm of S: a) Ca(H&lt;sub&gt;2&lt;/sub&gt;PO&lt;sub&gt;4&lt;/sub&gt;)2 H&lt;sub&gt;2&lt;/sub&gt;O-500 ppm P in 2.0 N acetic acid - 11; b) 0.5 N NH&lt;sub&gt;4&lt;/sub&gt;OAc in 0.25 N acetic acid- 17; c) CaCl&lt;sub&gt;2&lt;/sub&gt; 0.15% - 19. The critical levels of available S-SO&lt;sub&gt;4&lt;/sub&gt;= in soils would be overestimated if evaluated by relative uptake of available sulphur. Turbidimetric determinations of S-SO&lt;sub&gt;4&lt;/sub&gt;= have small sensibility in low concentrations of sulphates in soil extracts. One suggest the refining of analytical techniques for sulphates, including several soil/solution ratios.&lt;/p&gt;<br<&lt;!-- @page { margin: 2cm } --&gt; &lt;p class="western" align="justify"&gt;Conduziu-se um experimento em casa de vegetação com amostras superficiais de 12 solos, provenientes dos Estados de São Paulo, Minas Gerais e Goiás (Brasil), com teores de carbono variando entre 0,5 e 3,03%, de enxofre entre 0,014 e 0,0319% e de argila entre 8 e 60%. Avaliou-se o S-SO&lt;sub&gt;4&lt;/sub&gt;= disponível por 4 extratores químicos, Ca(H&lt;sub&gt;2&lt;/sub&gt;PO&lt;sub&gt;4&lt;/sub&gt;) 2.H&lt;sub&gt;2&lt;/sub&gt;O-500 ppm P em ácido acético 2,0 N, NH&lt;sub&gt;4&lt;/sub&gt;OAc 0,5 N em ácido acético 0,25 N, CaCl&lt;sub&gt;2&lt;/sub&gt; 0,15% e HCl 0,05 M. Os solos foram submetidos a 2 cultivos sucessivos com milho (&lt;em&gt;Zea&lt;/em&gt; &lt;em&gt;mays&lt;/em&gt; L.) com os tratamentos: 3 doses de gesso (0, 20 e 40 ppm S), na ausência e presença de calagem. Dentre os extratores estudados, Ca(H&lt;sub&gt;2&lt;/sub&gt;PO&lt;sub&gt;4&lt;/sub&gt;)-500 ppm P em ácido acético 2,0 N apresentou o melhor desempenho tanto em termos operacionais quanto na correlação com a absorção de enxofre pelo milho. O extrator HCl 0,01M revelou-se inadequado por não se terem obtido extratos límpidos para a determinação turbidimétrica de S-SO&lt;sub&gt;4&lt;/sub&gt;=. Os níveis críticos de S-SO4= nos solos foram: a) Ca(H&lt;sub&gt;2&lt;/sub&gt;PO&lt;sub&gt;4&lt;/sub&gt;)2.H2O-500 ppm P em ácido acético 2,0 N: 11 ppm; b) NH&lt;sub&gt;4&lt;/sub&gt;OAc 0,5 N em ácido acético 0,25 N: 17 ppm; c) CaCl&lt;sub&gt;2&lt;/sub&gt; 0,15%: 19 ppm. Os níveis críticos de S-SO&lt;sub&gt;4&lt;/sub&gt;= disponíveis são superestimados quando avaliados pela absorção relativa de enxofre. A determinação turbidimétrica de S-SO&lt;sub&gt;4&lt;/sub&gt;= apresenta pequena sensibilidade em baixas concentrações de sulfatos nos solos. Sugere-se o refinamento das técnicas de determinação analítica de sulfatos em solos, incluindo várias relações solo/solução de extratores.&lt;/p&gt;</subfield></datafield><datafield tag="653" ind1=" " ind2="0"><subfield code="a">Agriculture (General)</subfield></datafield><datafield tag="700" ind1="0" ind2=" "><subfield code="a">Huberto José Kliemann</subfield><subfield code="e">verfasserin</subfield><subfield code="4">aut</subfield></datafield><datafield tag="773" ind1="0" ind2="8"><subfield code="i">In</subfield><subfield code="t">Pesquisa Agropecuária Tropical</subfield><subfield code="d">Universidade Federal de Goiás, 2010</subfield><subfield code="g">23(2007), 1, Seite 165-186</subfield><subfield code="w">(DE-627)518258823</subfield><subfield code="w">(DE-600)2251415-6</subfield><subfield code="x">19834063</subfield><subfield code="7">nnns</subfield></datafield><datafield tag="773" ind1="1" ind2="8"><subfield code="g">volume:23</subfield><subfield code="g">year:2007</subfield><subfield code="g">number:1</subfield><subfield code="g">pages:165-186</subfield></datafield><datafield tag="856" ind1="4" ind2="0"><subfield code="u">https://doi.org/10.5216/pat.v23i1.2639</subfield><subfield code="z">kostenfrei</subfield></datafield><datafield tag="856" ind1="4" ind2="0"><subfield code="u">https://doaj.org/article/22eb0055062944daa81f8b8073aaf675</subfield><subfield code="z">kostenfrei</subfield></datafield><datafield tag="856" ind1="4" ind2="0"><subfield code="u">http://www.revistas.ufg.br/index.php/pat/article/view/2639</subfield><subfield code="z">kostenfrei</subfield></datafield><datafield tag="856" ind1="4" ind2="2"><subfield code="u">https://doaj.org/toc/1983-4063</subfield><subfield code="y">Journal toc</subfield><subfield code="z">kostenfrei</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_USEFLAG_A</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">SYSFLAG_A</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_DOAJ</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_20</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_22</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_24</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_31</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_39</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_40</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_60</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_62</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_63</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_65</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_69</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_70</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_73</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_95</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_105</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_110</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_151</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_161</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_213</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_230</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_285</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_293</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_602</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2014</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4012</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4037</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4112</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4125</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4126</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4249</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4305</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4306</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4307</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4313</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4322</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4323</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4324</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4325</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4367</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4700</subfield></datafield><datafield tag="951" ind1=" " ind2=" "><subfield code="a">AR</subfield></datafield><datafield tag="952" ind1=" " ind2=" "><subfield code="d">23</subfield><subfield code="j">2007</subfield><subfield code="e">1</subfield><subfield code="h">165-186</subfield></datafield></record></collection>
|
callnumber-first |
S - Agriculture |
author |
Eurípedes Malavolta |
spellingShingle |
Eurípedes Malavolta misc S1-972 misc Agriculture (General) SULPHUR AVAILABILITY IN BRAZILIAN SOILS: AVAILABLE SULPHATE-SULPHUR EVALUATION BY CHEMICAL EXTRACTANTS DISPONIBILIDADE DE ENXOFRE EM SOLOS BRASILEIROS: AVALIAÇÃO DO ENXOFRE-SULFATO DISPONÍVEL POR EXTRATORES QUÍMICOS |
authorStr |
Eurípedes Malavolta |
ppnlink_with_tag_str_mv |
@@773@@(DE-627)518258823 |
format |
electronic Article |
delete_txt_mv |
keep |
author_role |
aut aut |
collection |
DOAJ |
remote_str |
true |
callnumber-label |
S1-972 |
illustrated |
Not Illustrated |
issn |
19834063 |
topic_title |
S1-972 SULPHUR AVAILABILITY IN BRAZILIAN SOILS: AVAILABLE SULPHATE-SULPHUR EVALUATION BY CHEMICAL EXTRACTANTS DISPONIBILIDADE DE ENXOFRE EM SOLOS BRASILEIROS: AVALIAÇÃO DO ENXOFRE-SULFATO DISPONÍVEL POR EXTRATORES QUÍMICOS |
topic |
misc S1-972 misc Agriculture (General) |
topic_unstemmed |
misc S1-972 misc Agriculture (General) |
topic_browse |
misc S1-972 misc Agriculture (General) |
format_facet |
Elektronische Aufsätze Aufsätze Elektronische Ressource |
format_main_str_mv |
Text Zeitschrift/Artikel |
carriertype_str_mv |
cr |
hierarchy_parent_title |
Pesquisa Agropecuária Tropical |
hierarchy_parent_id |
518258823 |
hierarchy_top_title |
Pesquisa Agropecuária Tropical |
isfreeaccess_txt |
true |
familylinks_str_mv |
(DE-627)518258823 (DE-600)2251415-6 |
title |
SULPHUR AVAILABILITY IN BRAZILIAN SOILS: AVAILABLE SULPHATE-SULPHUR EVALUATION BY CHEMICAL EXTRACTANTS DISPONIBILIDADE DE ENXOFRE EM SOLOS BRASILEIROS: AVALIAÇÃO DO ENXOFRE-SULFATO DISPONÍVEL POR EXTRATORES QUÍMICOS |
ctrlnum |
(DE-627)DOAJ024523992 (DE-599)DOAJ22eb0055062944daa81f8b8073aaf675 |
title_full |
SULPHUR AVAILABILITY IN BRAZILIAN SOILS: AVAILABLE SULPHATE-SULPHUR EVALUATION BY CHEMICAL EXTRACTANTS DISPONIBILIDADE DE ENXOFRE EM SOLOS BRASILEIROS: AVALIAÇÃO DO ENXOFRE-SULFATO DISPONÍVEL POR EXTRATORES QUÍMICOS |
author_sort |
Eurípedes Malavolta |
journal |
Pesquisa Agropecuária Tropical |
journalStr |
Pesquisa Agropecuária Tropical |
callnumber-first-code |
S |
lang_code |
eng por |
isOA_bool |
true |
recordtype |
marc |
publishDateSort |
2007 |
contenttype_str_mv |
txt |
container_start_page |
165 |
author_browse |
Eurípedes Malavolta Huberto José Kliemann |
container_volume |
23 |
class |
S1-972 |
format_se |
Elektronische Aufsätze |
author-letter |
Eurípedes Malavolta |
doi_str_mv |
10.5216/pat.v23i1.2639 |
author2-role |
verfasserin |
title_sort |
sulphur availability in brazilian soils: available sulphate-sulphur evaluation by chemical extractants disponibilidade de enxofre em solos brasileiros: avaliação do enxofre-sulfato disponível por extratores químicos |
callnumber |
S1-972 |
title_auth |
SULPHUR AVAILABILITY IN BRAZILIAN SOILS: AVAILABLE SULPHATE-SULPHUR EVALUATION BY CHEMICAL EXTRACTANTS DISPONIBILIDADE DE ENXOFRE EM SOLOS BRASILEIROS: AVALIAÇÃO DO ENXOFRE-SULFATO DISPONÍVEL POR EXTRATORES QUÍMICOS |
abstract |
<!-- page { margin: 2cm } --> <p class="western" align="justify">A greenhouse experiment was carried out with surface samples of 12 soils from the States of São Paulo, Minas Gerais and Goiás (Brazil), with carbon contents ranging from 0.5 to 3.03%, sulphur from 0.0104 to 0.0319% and clay from 8 to 60%. The available S-SO<sub>4</sub>= was evaluated by four chemical extractants: Ca(H<sub>2</sub>PO<sub>4</sub>,.H<sub>2</sub>O-500 ppm P in 2.0 N acetic acid: 0.5 N ammonium acetate in 0.25 N acetic acid; CaCl<sub>2</sub> 0.15% and 0.05 M HCI. Corn (<em>Zea</em> <em>mays</em> L.) was grown in two successive crops in the presence of three rates of S (0, 20 and 40 ppm S), in absence and presence of liming. Among the chemical extractants, calcium phosphate in 2.0 N acetic acid provided the best performance both in operational terms and with respect to correlation with dry matter yield and S uptake. Dilute 0.05 M HCl proved to be thoroughly inadequate due to the impossibility of giving clear uncolored extracts suitable for the turbidimetric determination of S-SO<sub>4</sub>= thereof. The critical levels were, in ppm of S: a) Ca(H<sub>2</sub>PO<sub>4</sub>)2 H<sub>2</sub>O-500 ppm P in 2.0 N acetic acid - 11; b) 0.5 N NH<sub>4</sub>OAc in 0.25 N acetic acid- 17; c) CaCl<sub>2</sub> 0.15% - 19. The critical levels of available S-SO<sub>4</sub>= in soils would be overestimated if evaluated by relative uptake of available sulphur. Turbidimetric determinations of S-SO<sub>4</sub>= have small sensibility in low concentrations of sulphates in soil extracts. One suggest the refining of analytical techniques for sulphates, including several soil/solution ratios.</p><br<<!-- @page { margin: 2cm } --> <p class="western" align="justify">Conduziu-se um experimento em casa de vegetação com amostras superficiais de 12 solos, provenientes dos Estados de São Paulo, Minas Gerais e Goiás (Brasil), com teores de carbono variando entre 0,5 e 3,03%, de enxofre entre 0,014 e 0,0319% e de argila entre 8 e 60%. Avaliou-se o S-SO<sub>4</sub>= disponível por 4 extratores químicos, Ca(H<sub>2</sub>PO<sub>4</sub>) 2.H<sub>2</sub>O-500 ppm P em ácido acético 2,0 N, NH<sub>4</sub>OAc 0,5 N em ácido acético 0,25 N, CaCl<sub>2</sub> 0,15% e HCl 0,05 M. Os solos foram submetidos a 2 cultivos sucessivos com milho (<em>Zea</em> <em>mays</em> L.) com os tratamentos: 3 doses de gesso (0, 20 e 40 ppm S), na ausência e presença de calagem. Dentre os extratores estudados, Ca(H<sub>2</sub>PO<sub>4</sub>)-500 ppm P em ácido acético 2,0 N apresentou o melhor desempenho tanto em termos operacionais quanto na correlação com a absorção de enxofre pelo milho. O extrator HCl 0,01M revelou-se inadequado por não se terem obtido extratos límpidos para a determinação turbidimétrica de S-SO<sub>4</sub>=. Os níveis críticos de S-SO4= nos solos foram: a) Ca(H<sub>2</sub>PO<sub>4</sub>)2.H2O-500 ppm P em ácido acético 2,0 N: 11 ppm; b) NH<sub>4</sub>OAc 0,5 N em ácido acético 0,25 N: 17 ppm; c) CaCl<sub>2</sub> 0,15%: 19 ppm. Os níveis críticos de S-SO<sub>4</sub>= disponíveis são superestimados quando avaliados pela absorção relativa de enxofre. A determinação turbidimétrica de S-SO<sub>4</sub>= apresenta pequena sensibilidade em baixas concentrações de sulfatos nos solos. Sugere-se o refinamento das técnicas de determinação analítica de sulfatos em solos, incluindo várias relações solo/solução de extratores.</p> |
abstractGer |
<!-- page { margin: 2cm } --> <p class="western" align="justify">A greenhouse experiment was carried out with surface samples of 12 soils from the States of São Paulo, Minas Gerais and Goiás (Brazil), with carbon contents ranging from 0.5 to 3.03%, sulphur from 0.0104 to 0.0319% and clay from 8 to 60%. The available S-SO<sub>4</sub>= was evaluated by four chemical extractants: Ca(H<sub>2</sub>PO<sub>4</sub>,.H<sub>2</sub>O-500 ppm P in 2.0 N acetic acid: 0.5 N ammonium acetate in 0.25 N acetic acid; CaCl<sub>2</sub> 0.15% and 0.05 M HCI. Corn (<em>Zea</em> <em>mays</em> L.) was grown in two successive crops in the presence of three rates of S (0, 20 and 40 ppm S), in absence and presence of liming. Among the chemical extractants, calcium phosphate in 2.0 N acetic acid provided the best performance both in operational terms and with respect to correlation with dry matter yield and S uptake. Dilute 0.05 M HCl proved to be thoroughly inadequate due to the impossibility of giving clear uncolored extracts suitable for the turbidimetric determination of S-SO<sub>4</sub>= thereof. The critical levels were, in ppm of S: a) Ca(H<sub>2</sub>PO<sub>4</sub>)2 H<sub>2</sub>O-500 ppm P in 2.0 N acetic acid - 11; b) 0.5 N NH<sub>4</sub>OAc in 0.25 N acetic acid- 17; c) CaCl<sub>2</sub> 0.15% - 19. The critical levels of available S-SO<sub>4</sub>= in soils would be overestimated if evaluated by relative uptake of available sulphur. Turbidimetric determinations of S-SO<sub>4</sub>= have small sensibility in low concentrations of sulphates in soil extracts. One suggest the refining of analytical techniques for sulphates, including several soil/solution ratios.</p><br<<!-- @page { margin: 2cm } --> <p class="western" align="justify">Conduziu-se um experimento em casa de vegetação com amostras superficiais de 12 solos, provenientes dos Estados de São Paulo, Minas Gerais e Goiás (Brasil), com teores de carbono variando entre 0,5 e 3,03%, de enxofre entre 0,014 e 0,0319% e de argila entre 8 e 60%. Avaliou-se o S-SO<sub>4</sub>= disponível por 4 extratores químicos, Ca(H<sub>2</sub>PO<sub>4</sub>) 2.H<sub>2</sub>O-500 ppm P em ácido acético 2,0 N, NH<sub>4</sub>OAc 0,5 N em ácido acético 0,25 N, CaCl<sub>2</sub> 0,15% e HCl 0,05 M. Os solos foram submetidos a 2 cultivos sucessivos com milho (<em>Zea</em> <em>mays</em> L.) com os tratamentos: 3 doses de gesso (0, 20 e 40 ppm S), na ausência e presença de calagem. Dentre os extratores estudados, Ca(H<sub>2</sub>PO<sub>4</sub>)-500 ppm P em ácido acético 2,0 N apresentou o melhor desempenho tanto em termos operacionais quanto na correlação com a absorção de enxofre pelo milho. O extrator HCl 0,01M revelou-se inadequado por não se terem obtido extratos límpidos para a determinação turbidimétrica de S-SO<sub>4</sub>=. Os níveis críticos de S-SO4= nos solos foram: a) Ca(H<sub>2</sub>PO<sub>4</sub>)2.H2O-500 ppm P em ácido acético 2,0 N: 11 ppm; b) NH<sub>4</sub>OAc 0,5 N em ácido acético 0,25 N: 17 ppm; c) CaCl<sub>2</sub> 0,15%: 19 ppm. Os níveis críticos de S-SO<sub>4</sub>= disponíveis são superestimados quando avaliados pela absorção relativa de enxofre. A determinação turbidimétrica de S-SO<sub>4</sub>= apresenta pequena sensibilidade em baixas concentrações de sulfatos nos solos. Sugere-se o refinamento das técnicas de determinação analítica de sulfatos em solos, incluindo várias relações solo/solução de extratores.</p> |
abstract_unstemmed |
<!-- page { margin: 2cm } --> <p class="western" align="justify">A greenhouse experiment was carried out with surface samples of 12 soils from the States of São Paulo, Minas Gerais and Goiás (Brazil), with carbon contents ranging from 0.5 to 3.03%, sulphur from 0.0104 to 0.0319% and clay from 8 to 60%. The available S-SO<sub>4</sub>= was evaluated by four chemical extractants: Ca(H<sub>2</sub>PO<sub>4</sub>,.H<sub>2</sub>O-500 ppm P in 2.0 N acetic acid: 0.5 N ammonium acetate in 0.25 N acetic acid; CaCl<sub>2</sub> 0.15% and 0.05 M HCI. Corn (<em>Zea</em> <em>mays</em> L.) was grown in two successive crops in the presence of three rates of S (0, 20 and 40 ppm S), in absence and presence of liming. Among the chemical extractants, calcium phosphate in 2.0 N acetic acid provided the best performance both in operational terms and with respect to correlation with dry matter yield and S uptake. Dilute 0.05 M HCl proved to be thoroughly inadequate due to the impossibility of giving clear uncolored extracts suitable for the turbidimetric determination of S-SO<sub>4</sub>= thereof. The critical levels were, in ppm of S: a) Ca(H<sub>2</sub>PO<sub>4</sub>)2 H<sub>2</sub>O-500 ppm P in 2.0 N acetic acid - 11; b) 0.5 N NH<sub>4</sub>OAc in 0.25 N acetic acid- 17; c) CaCl<sub>2</sub> 0.15% - 19. The critical levels of available S-SO<sub>4</sub>= in soils would be overestimated if evaluated by relative uptake of available sulphur. Turbidimetric determinations of S-SO<sub>4</sub>= have small sensibility in low concentrations of sulphates in soil extracts. One suggest the refining of analytical techniques for sulphates, including several soil/solution ratios.</p><br<<!-- @page { margin: 2cm } --> <p class="western" align="justify">Conduziu-se um experimento em casa de vegetação com amostras superficiais de 12 solos, provenientes dos Estados de São Paulo, Minas Gerais e Goiás (Brasil), com teores de carbono variando entre 0,5 e 3,03%, de enxofre entre 0,014 e 0,0319% e de argila entre 8 e 60%. Avaliou-se o S-SO<sub>4</sub>= disponível por 4 extratores químicos, Ca(H<sub>2</sub>PO<sub>4</sub>) 2.H<sub>2</sub>O-500 ppm P em ácido acético 2,0 N, NH<sub>4</sub>OAc 0,5 N em ácido acético 0,25 N, CaCl<sub>2</sub> 0,15% e HCl 0,05 M. Os solos foram submetidos a 2 cultivos sucessivos com milho (<em>Zea</em> <em>mays</em> L.) com os tratamentos: 3 doses de gesso (0, 20 e 40 ppm S), na ausência e presença de calagem. Dentre os extratores estudados, Ca(H<sub>2</sub>PO<sub>4</sub>)-500 ppm P em ácido acético 2,0 N apresentou o melhor desempenho tanto em termos operacionais quanto na correlação com a absorção de enxofre pelo milho. O extrator HCl 0,01M revelou-se inadequado por não se terem obtido extratos límpidos para a determinação turbidimétrica de S-SO<sub>4</sub>=. Os níveis críticos de S-SO4= nos solos foram: a) Ca(H<sub>2</sub>PO<sub>4</sub>)2.H2O-500 ppm P em ácido acético 2,0 N: 11 ppm; b) NH<sub>4</sub>OAc 0,5 N em ácido acético 0,25 N: 17 ppm; c) CaCl<sub>2</sub> 0,15%: 19 ppm. Os níveis críticos de S-SO<sub>4</sub>= disponíveis são superestimados quando avaliados pela absorção relativa de enxofre. A determinação turbidimétrica de S-SO<sub>4</sub>= apresenta pequena sensibilidade em baixas concentrações de sulfatos nos solos. Sugere-se o refinamento das técnicas de determinação analítica de sulfatos em solos, incluindo várias relações solo/solução de extratores.</p> |
collection_details |
GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4367 GBV_ILN_4700 |
container_issue |
1 |
title_short |
SULPHUR AVAILABILITY IN BRAZILIAN SOILS: AVAILABLE SULPHATE-SULPHUR EVALUATION BY CHEMICAL EXTRACTANTS DISPONIBILIDADE DE ENXOFRE EM SOLOS BRASILEIROS: AVALIAÇÃO DO ENXOFRE-SULFATO DISPONÍVEL POR EXTRATORES QUÍMICOS |
url |
https://doi.org/10.5216/pat.v23i1.2639 https://doaj.org/article/22eb0055062944daa81f8b8073aaf675 http://www.revistas.ufg.br/index.php/pat/article/view/2639 https://doaj.org/toc/1983-4063 |
remote_bool |
true |
author2 |
Huberto José Kliemann |
author2Str |
Huberto José Kliemann |
ppnlink |
518258823 |
callnumber-subject |
S - General Agriculture |
mediatype_str_mv |
c |
isOA_txt |
true |
hochschulschrift_bool |
false |
doi_str |
10.5216/pat.v23i1.2639 |
callnumber-a |
S1-972 |
up_date |
2024-07-03T23:19:27.900Z |
_version_ |
1803601856851607552 |
fullrecord_marcxml |
<?xml version="1.0" encoding="UTF-8"?><collection xmlns="http://www.loc.gov/MARC21/slim"><record><leader>01000caa a22002652 4500</leader><controlfield tag="001">DOAJ024523992</controlfield><controlfield tag="003">DE-627</controlfield><controlfield tag="005">20230307074942.0</controlfield><controlfield tag="007">cr uuu---uuuuu</controlfield><controlfield tag="008">230226s2007 xx |||||o 00| ||eng c</controlfield><datafield tag="024" ind1="7" ind2=" "><subfield code="a">10.5216/pat.v23i1.2639</subfield><subfield code="2">doi</subfield></datafield><datafield tag="035" ind1=" " ind2=" "><subfield code="a">(DE-627)DOAJ024523992</subfield></datafield><datafield tag="035" ind1=" " ind2=" "><subfield code="a">(DE-599)DOAJ22eb0055062944daa81f8b8073aaf675</subfield></datafield><datafield tag="040" ind1=" " ind2=" "><subfield code="a">DE-627</subfield><subfield code="b">ger</subfield><subfield code="c">DE-627</subfield><subfield code="e">rakwb</subfield></datafield><datafield tag="041" ind1=" " ind2=" "><subfield code="a">eng</subfield><subfield code="a">por</subfield></datafield><datafield tag="050" ind1=" " ind2="0"><subfield code="a">S1-972</subfield></datafield><datafield tag="100" ind1="0" ind2=" "><subfield code="a">Eurípedes Malavolta</subfield><subfield code="e">verfasserin</subfield><subfield code="4">aut</subfield></datafield><datafield tag="245" ind1="1" ind2="0"><subfield code="a">SULPHUR AVAILABILITY IN BRAZILIAN SOILS: AVAILABLE SULPHATE-SULPHUR EVALUATION BY CHEMICAL EXTRACTANTS DISPONIBILIDADE DE ENXOFRE EM SOLOS BRASILEIROS: AVALIAÇÃO DO ENXOFRE-SULFATO DISPONÍVEL POR EXTRATORES QUÍMICOS</subfield></datafield><datafield tag="264" ind1=" " ind2="1"><subfield code="c">2007</subfield></datafield><datafield tag="336" ind1=" " ind2=" "><subfield code="a">Text</subfield><subfield code="b">txt</subfield><subfield code="2">rdacontent</subfield></datafield><datafield tag="337" ind1=" " ind2=" "><subfield code="a">Computermedien</subfield><subfield code="b">c</subfield><subfield code="2">rdamedia</subfield></datafield><datafield tag="338" ind1=" " ind2=" "><subfield code="a">Online-Ressource</subfield><subfield code="b">cr</subfield><subfield code="2">rdacarrier</subfield></datafield><datafield tag="520" ind1=" " ind2=" "><subfield code="a">&lt;!-- page { margin: 2cm } --&gt; &lt;p class="western" align="justify"&gt;A greenhouse experiment was carried out with surface samples of 12 soils from the States of São Paulo, Minas Gerais and Goiás (Brazil), with carbon contents ranging from 0.5 to 3.03%, sulphur from 0.0104 to 0.0319% and clay from 8 to 60%. The available S-SO&lt;sub&gt;4&lt;/sub&gt;= was evaluated by four chemical extractants: Ca(H&lt;sub&gt;2&lt;/sub&gt;PO&lt;sub&gt;4&lt;/sub&gt;,.H&lt;sub&gt;2&lt;/sub&gt;O-500 ppm P in 2.0 N acetic acid: 0.5 N ammonium acetate in 0.25 N acetic acid; CaCl&lt;sub&gt;2&lt;/sub&gt; 0.15% and 0.05 M HCI. Corn (&lt;em&gt;Zea&lt;/em&gt; &lt;em&gt;mays&lt;/em&gt; L.) was grown in two successive crops in the presence of three rates of S (0, 20 and 40 ppm S), in absence and presence of liming. Among the chemical extractants, calcium phosphate in 2.0 N acetic acid provided the best performance both in operational terms and with respect to correlation with dry matter yield and S uptake. Dilute 0.05 M HCl proved to be thoroughly inadequate due to the impossibility of giving clear uncolored extracts suitable for the turbidimetric determination of S-SO&lt;sub&gt;4&lt;/sub&gt;= thereof. The critical levels were, in ppm of S: a) Ca(H&lt;sub&gt;2&lt;/sub&gt;PO&lt;sub&gt;4&lt;/sub&gt;)2 H&lt;sub&gt;2&lt;/sub&gt;O-500 ppm P in 2.0 N acetic acid - 11; b) 0.5 N NH&lt;sub&gt;4&lt;/sub&gt;OAc in 0.25 N acetic acid- 17; c) CaCl&lt;sub&gt;2&lt;/sub&gt; 0.15% - 19. The critical levels of available S-SO&lt;sub&gt;4&lt;/sub&gt;= in soils would be overestimated if evaluated by relative uptake of available sulphur. Turbidimetric determinations of S-SO&lt;sub&gt;4&lt;/sub&gt;= have small sensibility in low concentrations of sulphates in soil extracts. One suggest the refining of analytical techniques for sulphates, including several soil/solution ratios.&lt;/p&gt;<br<&lt;!-- @page { margin: 2cm } --&gt; &lt;p class="western" align="justify"&gt;Conduziu-se um experimento em casa de vegetação com amostras superficiais de 12 solos, provenientes dos Estados de São Paulo, Minas Gerais e Goiás (Brasil), com teores de carbono variando entre 0,5 e 3,03%, de enxofre entre 0,014 e 0,0319% e de argila entre 8 e 60%. Avaliou-se o S-SO&lt;sub&gt;4&lt;/sub&gt;= disponível por 4 extratores químicos, Ca(H&lt;sub&gt;2&lt;/sub&gt;PO&lt;sub&gt;4&lt;/sub&gt;) 2.H&lt;sub&gt;2&lt;/sub&gt;O-500 ppm P em ácido acético 2,0 N, NH&lt;sub&gt;4&lt;/sub&gt;OAc 0,5 N em ácido acético 0,25 N, CaCl&lt;sub&gt;2&lt;/sub&gt; 0,15% e HCl 0,05 M. Os solos foram submetidos a 2 cultivos sucessivos com milho (&lt;em&gt;Zea&lt;/em&gt; &lt;em&gt;mays&lt;/em&gt; L.) com os tratamentos: 3 doses de gesso (0, 20 e 40 ppm S), na ausência e presença de calagem. Dentre os extratores estudados, Ca(H&lt;sub&gt;2&lt;/sub&gt;PO&lt;sub&gt;4&lt;/sub&gt;)-500 ppm P em ácido acético 2,0 N apresentou o melhor desempenho tanto em termos operacionais quanto na correlação com a absorção de enxofre pelo milho. O extrator HCl 0,01M revelou-se inadequado por não se terem obtido extratos límpidos para a determinação turbidimétrica de S-SO&lt;sub&gt;4&lt;/sub&gt;=. Os níveis críticos de S-SO4= nos solos foram: a) Ca(H&lt;sub&gt;2&lt;/sub&gt;PO&lt;sub&gt;4&lt;/sub&gt;)2.H2O-500 ppm P em ácido acético 2,0 N: 11 ppm; b) NH&lt;sub&gt;4&lt;/sub&gt;OAc 0,5 N em ácido acético 0,25 N: 17 ppm; c) CaCl&lt;sub&gt;2&lt;/sub&gt; 0,15%: 19 ppm. Os níveis críticos de S-SO&lt;sub&gt;4&lt;/sub&gt;= disponíveis são superestimados quando avaliados pela absorção relativa de enxofre. A determinação turbidimétrica de S-SO&lt;sub&gt;4&lt;/sub&gt;= apresenta pequena sensibilidade em baixas concentrações de sulfatos nos solos. Sugere-se o refinamento das técnicas de determinação analítica de sulfatos em solos, incluindo várias relações solo/solução de extratores.&lt;/p&gt;</subfield></datafield><datafield tag="653" ind1=" " ind2="0"><subfield code="a">Agriculture (General)</subfield></datafield><datafield tag="700" ind1="0" ind2=" "><subfield code="a">Huberto José Kliemann</subfield><subfield code="e">verfasserin</subfield><subfield code="4">aut</subfield></datafield><datafield tag="773" ind1="0" ind2="8"><subfield code="i">In</subfield><subfield code="t">Pesquisa Agropecuária Tropical</subfield><subfield code="d">Universidade Federal de Goiás, 2010</subfield><subfield code="g">23(2007), 1, Seite 165-186</subfield><subfield code="w">(DE-627)518258823</subfield><subfield code="w">(DE-600)2251415-6</subfield><subfield code="x">19834063</subfield><subfield code="7">nnns</subfield></datafield><datafield tag="773" ind1="1" ind2="8"><subfield code="g">volume:23</subfield><subfield code="g">year:2007</subfield><subfield code="g">number:1</subfield><subfield code="g">pages:165-186</subfield></datafield><datafield tag="856" ind1="4" ind2="0"><subfield code="u">https://doi.org/10.5216/pat.v23i1.2639</subfield><subfield code="z">kostenfrei</subfield></datafield><datafield tag="856" ind1="4" ind2="0"><subfield code="u">https://doaj.org/article/22eb0055062944daa81f8b8073aaf675</subfield><subfield code="z">kostenfrei</subfield></datafield><datafield tag="856" ind1="4" ind2="0"><subfield code="u">http://www.revistas.ufg.br/index.php/pat/article/view/2639</subfield><subfield code="z">kostenfrei</subfield></datafield><datafield tag="856" ind1="4" ind2="2"><subfield code="u">https://doaj.org/toc/1983-4063</subfield><subfield code="y">Journal toc</subfield><subfield code="z">kostenfrei</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_USEFLAG_A</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">SYSFLAG_A</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_DOAJ</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_20</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_22</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_24</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_31</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_39</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_40</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_60</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_62</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_63</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_65</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_69</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_70</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_73</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_95</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_105</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_110</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_151</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_161</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_213</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_230</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_285</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_293</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_602</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2014</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4012</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4037</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4112</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4125</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4126</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4249</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4305</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4306</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4307</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4313</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4322</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4323</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4324</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4325</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4367</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_4700</subfield></datafield><datafield tag="951" ind1=" " ind2=" "><subfield code="a">AR</subfield></datafield><datafield tag="952" ind1=" " ind2=" "><subfield code="d">23</subfield><subfield code="j">2007</subfield><subfield code="e">1</subfield><subfield code="h">165-186</subfield></datafield></record></collection>
|
score |
7.400405 |