Dinâmica de íons em solo ácido lixiviado com extratos de resíduos de adubos verdes e soluções puras de ácidos orgânicos Dynamic of ions in acid soil leached with green manure residues extracts and pure solutions of organic acids
A influência da aplicação de resíduos vegetais na dinâmica de íons em solos ácidos é pouco conhecida. Neste estudo, a mobilidade de íons em amostra do horizonte Bw de um Latossolo Vermelho-Escuro álico lixiviado com soluções puras de ácidos cítrico e succínico e extratos aquosos de resíduos de nabo...
Ausführliche Beschreibung
Autor*in: |
Júlio Cezar Franchini [verfasserIn] Mario Miyazawa [verfasserIn] Marcos Antonio Pavan [verfasserIn] Euripedes Malavolta [verfasserIn] |
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Format: |
E-Artikel |
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Sprache: |
Englisch ; Spanisch ; Portugiesisch |
Erschienen: |
1999 |
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Schlagwörter: |
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Übergeordnetes Werk: |
In: Pesquisa Agropecuária Brasileira - Embrapa Informação Tecnológica, 2004, 34(1999), 12, Seite 2267-2276 |
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Übergeordnetes Werk: |
volume:34 ; year:1999 ; number:12 ; pages:2267-2276 |
Links: |
Link aufrufen |
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DOI / URN: |
10.1590/S0100-204X1999001200014 |
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Katalog-ID: |
DOAJ030792215 |
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520 | |a A influência da aplicação de resíduos vegetais na dinâmica de íons em solos ácidos é pouco conhecida. Neste estudo, a mobilidade de íons em amostra do horizonte Bw de um Latossolo Vermelho-Escuro álico lixiviado com soluções puras de ácidos cítrico e succínico e extratos aquosos de resíduos de nabo forrageiro (Raphanus sativus) e aveia-preta (Avena strigosa) foi avaliada em colunas de solo (5, 10, 20 e 40 cm de altura por 4 cm de diâmetro). Após a percolação das soluções e extratos pelas colunas de solo determinaram-se, nas soluções efluentes, os teores de Ca (Ca s), Mg (Mg s), K (Ks), Al total (Al st), orgânico (Al so), monomérico (Al sm) e carbono orgânico dissolvido. No solo, foram determinados os teores trocáveis de Ca (Ca tr), Mg (Mg tr), K (Ktr) e Al (Al tr) e o pH (CaCl2). Os ácidos cítrico e succínico aumentaram os teores de Al st e Ca s, respectivamente, causando reduções nas frações trocáveis desses elementos no solo. O extrato de aveia-preta foi mais efetivo na remoção do Ca tr e o de nabo forrageiro na do Al tr. O decréscimo de Ca tr e Al tr foi seguido do aumento do Ktr. A formação de complexos entre Ca s e Al tr com compostos orgânicos de baixo peso molecular foi sugerida como o provável mecanismo responsável pela mobilidade dos íons polivalentes no subsolo de solos ácidos após a aplicação dos extratos de resíduos vegetais e das soluções puras de ácidos orgânicos.<br<The influence of green manure residues addition in the dynamic of ions in acid soils is not well known. In this study, ion mobility in a sample of the Bw horizon of an Dark-Red Latosol (Oxisol), leached with citric and succinic acid pure solutions and with aqueous residue extracts of black oats (Avena strigosa) and oil seed radish (Raphanus sativus) were evaluated in soil columns (5, 10, 20, and 40 cm long by 4 cm diameter). After the solutions and extracts passed through the soil columns, the following parameters were determined: solubles contents of Ca s, Mg s, Ks, Al st (total), Al so (organic), Al sm (monomeric) and dissolved organic carbon. In soil, the parameters evaluated were the exchangeable contents of Ca ex, Mg ex, Kex, and Al ex and pH (CaCl2). Citric and succinic acids increased Al st and Ca s contents, respectively, resulting in decreasing exchangeable fractions of these elements in soil. Black oats extract was more effective to extract Ca ex and oil seed radish to extract Al ex. The decrease in Ca ex and Al ex was followed by an increase in Kex. Organic complexes formed with low molecular organic ligands and Ca s and Al ex were suggested to play a role in the mobility of ions in subsoils of acid soils after the addition of both crop residues extracts and pure organic acid solutions. | ||
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10.1590/S0100-204X1999001200014 doi (DE-627)DOAJ030792215 (DE-599)DOAJ38999ac134a5488b97c251b0b78f25e7 DE-627 ger DE-627 rakwb eng spa por S1-972 Júlio Cezar Franchini verfasserin aut Dinâmica de íons em solo ácido lixiviado com extratos de resíduos de adubos verdes e soluções puras de ácidos orgânicos Dynamic of ions in acid soil leached with green manure residues extracts and pure solutions of organic acids 1999 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier A influência da aplicação de resíduos vegetais na dinâmica de íons em solos ácidos é pouco conhecida. Neste estudo, a mobilidade de íons em amostra do horizonte Bw de um Latossolo Vermelho-Escuro álico lixiviado com soluções puras de ácidos cítrico e succínico e extratos aquosos de resíduos de nabo forrageiro (Raphanus sativus) e aveia-preta (Avena strigosa) foi avaliada em colunas de solo (5, 10, 20 e 40 cm de altura por 4 cm de diâmetro). Após a percolação das soluções e extratos pelas colunas de solo determinaram-se, nas soluções efluentes, os teores de Ca (Ca s), Mg (Mg s), K (Ks), Al total (Al st), orgânico (Al so), monomérico (Al sm) e carbono orgânico dissolvido. No solo, foram determinados os teores trocáveis de Ca (Ca tr), Mg (Mg tr), K (Ktr) e Al (Al tr) e o pH (CaCl2). Os ácidos cítrico e succínico aumentaram os teores de Al st e Ca s, respectivamente, causando reduções nas frações trocáveis desses elementos no solo. O extrato de aveia-preta foi mais efetivo na remoção do Ca tr e o de nabo forrageiro na do Al tr. O decréscimo de Ca tr e Al tr foi seguido do aumento do Ktr. A formação de complexos entre Ca s e Al tr com compostos orgânicos de baixo peso molecular foi sugerida como o provável mecanismo responsável pela mobilidade dos íons polivalentes no subsolo de solos ácidos após a aplicação dos extratos de resíduos vegetais e das soluções puras de ácidos orgânicos.<br<The influence of green manure residues addition in the dynamic of ions in acid soils is not well known. In this study, ion mobility in a sample of the Bw horizon of an Dark-Red Latosol (Oxisol), leached with citric and succinic acid pure solutions and with aqueous residue extracts of black oats (Avena strigosa) and oil seed radish (Raphanus sativus) were evaluated in soil columns (5, 10, 20, and 40 cm long by 4 cm diameter). After the solutions and extracts passed through the soil columns, the following parameters were determined: solubles contents of Ca s, Mg s, Ks, Al st (total), Al so (organic), Al sm (monomeric) and dissolved organic carbon. In soil, the parameters evaluated were the exchangeable contents of Ca ex, Mg ex, Kex, and Al ex and pH (CaCl2). Citric and succinic acids increased Al st and Ca s contents, respectively, resulting in decreasing exchangeable fractions of these elements in soil. Black oats extract was more effective to extract Ca ex and oil seed radish to extract Al ex. The decrease in Ca ex and Al ex was followed by an increase in Kex. Organic complexes formed with low molecular organic ligands and Ca s and Al ex were suggested to play a role in the mobility of ions in subsoils of acid soils after the addition of both crop residues extracts and pure organic acid solutions. complexos orgânicos mobilidade de cátions cálcio alumínio organic complexes cation mobility calcium aluminum Agriculture (General) Mario Miyazawa verfasserin aut Marcos Antonio Pavan verfasserin aut Euripedes Malavolta verfasserin aut In Pesquisa Agropecuária Brasileira Embrapa Informação Tecnológica, 2004 34(1999), 12, Seite 2267-2276 (DE-627)331758326 (DE-600)2053197-7 16783921 nnns volume:34 year:1999 number:12 pages:2267-2276 https://doi.org/10.1590/S0100-204X1999001200014 kostenfrei https://doaj.org/article/38999ac134a5488b97c251b0b78f25e7 kostenfrei http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X1999001200014 kostenfrei https://doaj.org/toc/0100-204X Journal toc kostenfrei https://doaj.org/toc/1678-3921 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 34 1999 12 2267-2276 |
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10.1590/S0100-204X1999001200014 doi (DE-627)DOAJ030792215 (DE-599)DOAJ38999ac134a5488b97c251b0b78f25e7 DE-627 ger DE-627 rakwb eng spa por S1-972 Júlio Cezar Franchini verfasserin aut Dinâmica de íons em solo ácido lixiviado com extratos de resíduos de adubos verdes e soluções puras de ácidos orgânicos Dynamic of ions in acid soil leached with green manure residues extracts and pure solutions of organic acids 1999 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier A influência da aplicação de resíduos vegetais na dinâmica de íons em solos ácidos é pouco conhecida. Neste estudo, a mobilidade de íons em amostra do horizonte Bw de um Latossolo Vermelho-Escuro álico lixiviado com soluções puras de ácidos cítrico e succínico e extratos aquosos de resíduos de nabo forrageiro (Raphanus sativus) e aveia-preta (Avena strigosa) foi avaliada em colunas de solo (5, 10, 20 e 40 cm de altura por 4 cm de diâmetro). Após a percolação das soluções e extratos pelas colunas de solo determinaram-se, nas soluções efluentes, os teores de Ca (Ca s), Mg (Mg s), K (Ks), Al total (Al st), orgânico (Al so), monomérico (Al sm) e carbono orgânico dissolvido. No solo, foram determinados os teores trocáveis de Ca (Ca tr), Mg (Mg tr), K (Ktr) e Al (Al tr) e o pH (CaCl2). Os ácidos cítrico e succínico aumentaram os teores de Al st e Ca s, respectivamente, causando reduções nas frações trocáveis desses elementos no solo. O extrato de aveia-preta foi mais efetivo na remoção do Ca tr e o de nabo forrageiro na do Al tr. O decréscimo de Ca tr e Al tr foi seguido do aumento do Ktr. A formação de complexos entre Ca s e Al tr com compostos orgânicos de baixo peso molecular foi sugerida como o provável mecanismo responsável pela mobilidade dos íons polivalentes no subsolo de solos ácidos após a aplicação dos extratos de resíduos vegetais e das soluções puras de ácidos orgânicos.<br<The influence of green manure residues addition in the dynamic of ions in acid soils is not well known. In this study, ion mobility in a sample of the Bw horizon of an Dark-Red Latosol (Oxisol), leached with citric and succinic acid pure solutions and with aqueous residue extracts of black oats (Avena strigosa) and oil seed radish (Raphanus sativus) were evaluated in soil columns (5, 10, 20, and 40 cm long by 4 cm diameter). After the solutions and extracts passed through the soil columns, the following parameters were determined: solubles contents of Ca s, Mg s, Ks, Al st (total), Al so (organic), Al sm (monomeric) and dissolved organic carbon. In soil, the parameters evaluated were the exchangeable contents of Ca ex, Mg ex, Kex, and Al ex and pH (CaCl2). Citric and succinic acids increased Al st and Ca s contents, respectively, resulting in decreasing exchangeable fractions of these elements in soil. Black oats extract was more effective to extract Ca ex and oil seed radish to extract Al ex. The decrease in Ca ex and Al ex was followed by an increase in Kex. Organic complexes formed with low molecular organic ligands and Ca s and Al ex were suggested to play a role in the mobility of ions in subsoils of acid soils after the addition of both crop residues extracts and pure organic acid solutions. complexos orgânicos mobilidade de cátions cálcio alumínio organic complexes cation mobility calcium aluminum Agriculture (General) Mario Miyazawa verfasserin aut Marcos Antonio Pavan verfasserin aut Euripedes Malavolta verfasserin aut In Pesquisa Agropecuária Brasileira Embrapa Informação Tecnológica, 2004 34(1999), 12, Seite 2267-2276 (DE-627)331758326 (DE-600)2053197-7 16783921 nnns volume:34 year:1999 number:12 pages:2267-2276 https://doi.org/10.1590/S0100-204X1999001200014 kostenfrei https://doaj.org/article/38999ac134a5488b97c251b0b78f25e7 kostenfrei http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X1999001200014 kostenfrei https://doaj.org/toc/0100-204X Journal toc kostenfrei https://doaj.org/toc/1678-3921 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 34 1999 12 2267-2276 |
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10.1590/S0100-204X1999001200014 doi (DE-627)DOAJ030792215 (DE-599)DOAJ38999ac134a5488b97c251b0b78f25e7 DE-627 ger DE-627 rakwb eng spa por S1-972 Júlio Cezar Franchini verfasserin aut Dinâmica de íons em solo ácido lixiviado com extratos de resíduos de adubos verdes e soluções puras de ácidos orgânicos Dynamic of ions in acid soil leached with green manure residues extracts and pure solutions of organic acids 1999 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier A influência da aplicação de resíduos vegetais na dinâmica de íons em solos ácidos é pouco conhecida. Neste estudo, a mobilidade de íons em amostra do horizonte Bw de um Latossolo Vermelho-Escuro álico lixiviado com soluções puras de ácidos cítrico e succínico e extratos aquosos de resíduos de nabo forrageiro (Raphanus sativus) e aveia-preta (Avena strigosa) foi avaliada em colunas de solo (5, 10, 20 e 40 cm de altura por 4 cm de diâmetro). Após a percolação das soluções e extratos pelas colunas de solo determinaram-se, nas soluções efluentes, os teores de Ca (Ca s), Mg (Mg s), K (Ks), Al total (Al st), orgânico (Al so), monomérico (Al sm) e carbono orgânico dissolvido. No solo, foram determinados os teores trocáveis de Ca (Ca tr), Mg (Mg tr), K (Ktr) e Al (Al tr) e o pH (CaCl2). Os ácidos cítrico e succínico aumentaram os teores de Al st e Ca s, respectivamente, causando reduções nas frações trocáveis desses elementos no solo. O extrato de aveia-preta foi mais efetivo na remoção do Ca tr e o de nabo forrageiro na do Al tr. O decréscimo de Ca tr e Al tr foi seguido do aumento do Ktr. A formação de complexos entre Ca s e Al tr com compostos orgânicos de baixo peso molecular foi sugerida como o provável mecanismo responsável pela mobilidade dos íons polivalentes no subsolo de solos ácidos após a aplicação dos extratos de resíduos vegetais e das soluções puras de ácidos orgânicos.<br<The influence of green manure residues addition in the dynamic of ions in acid soils is not well known. In this study, ion mobility in a sample of the Bw horizon of an Dark-Red Latosol (Oxisol), leached with citric and succinic acid pure solutions and with aqueous residue extracts of black oats (Avena strigosa) and oil seed radish (Raphanus sativus) were evaluated in soil columns (5, 10, 20, and 40 cm long by 4 cm diameter). After the solutions and extracts passed through the soil columns, the following parameters were determined: solubles contents of Ca s, Mg s, Ks, Al st (total), Al so (organic), Al sm (monomeric) and dissolved organic carbon. In soil, the parameters evaluated were the exchangeable contents of Ca ex, Mg ex, Kex, and Al ex and pH (CaCl2). Citric and succinic acids increased Al st and Ca s contents, respectively, resulting in decreasing exchangeable fractions of these elements in soil. Black oats extract was more effective to extract Ca ex and oil seed radish to extract Al ex. The decrease in Ca ex and Al ex was followed by an increase in Kex. Organic complexes formed with low molecular organic ligands and Ca s and Al ex were suggested to play a role in the mobility of ions in subsoils of acid soils after the addition of both crop residues extracts and pure organic acid solutions. complexos orgânicos mobilidade de cátions cálcio alumínio organic complexes cation mobility calcium aluminum Agriculture (General) Mario Miyazawa verfasserin aut Marcos Antonio Pavan verfasserin aut Euripedes Malavolta verfasserin aut In Pesquisa Agropecuária Brasileira Embrapa Informação Tecnológica, 2004 34(1999), 12, Seite 2267-2276 (DE-627)331758326 (DE-600)2053197-7 16783921 nnns volume:34 year:1999 number:12 pages:2267-2276 https://doi.org/10.1590/S0100-204X1999001200014 kostenfrei https://doaj.org/article/38999ac134a5488b97c251b0b78f25e7 kostenfrei http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X1999001200014 kostenfrei https://doaj.org/toc/0100-204X Journal toc kostenfrei https://doaj.org/toc/1678-3921 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 34 1999 12 2267-2276 |
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In Pesquisa Agropecuária Brasileira 34(1999), 12, Seite 2267-2276 volume:34 year:1999 number:12 pages:2267-2276 |
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S1-972 Dinâmica de íons em solo ácido lixiviado com extratos de resíduos de adubos verdes e soluções puras de ácidos orgânicos Dynamic of ions in acid soil leached with green manure residues extracts and pure solutions of organic acids complexos orgânicos mobilidade de cátions cálcio alumínio organic complexes cation mobility calcium aluminum |
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Dinâmica de íons em solo ácido lixiviado com extratos de resíduos de adubos verdes e soluções puras de ácidos orgânicos Dynamic of ions in acid soil leached with green manure residues extracts and pure solutions of organic acids |
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Dinâmica de íons em solo ácido lixiviado com extratos de resíduos de adubos verdes e soluções puras de ácidos orgânicos Dynamic of ions in acid soil leached with green manure residues extracts and pure solutions of organic acids |
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dinâmica de íons em solo ácido lixiviado com extratos de resíduos de adubos verdes e soluções puras de ácidos orgânicos dynamic of ions in acid soil leached with green manure residues extracts and pure solutions of organic acids |
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Dinâmica de íons em solo ácido lixiviado com extratos de resíduos de adubos verdes e soluções puras de ácidos orgânicos Dynamic of ions in acid soil leached with green manure residues extracts and pure solutions of organic acids |
abstract |
A influência da aplicação de resíduos vegetais na dinâmica de íons em solos ácidos é pouco conhecida. Neste estudo, a mobilidade de íons em amostra do horizonte Bw de um Latossolo Vermelho-Escuro álico lixiviado com soluções puras de ácidos cítrico e succínico e extratos aquosos de resíduos de nabo forrageiro (Raphanus sativus) e aveia-preta (Avena strigosa) foi avaliada em colunas de solo (5, 10, 20 e 40 cm de altura por 4 cm de diâmetro). Após a percolação das soluções e extratos pelas colunas de solo determinaram-se, nas soluções efluentes, os teores de Ca (Ca s), Mg (Mg s), K (Ks), Al total (Al st), orgânico (Al so), monomérico (Al sm) e carbono orgânico dissolvido. No solo, foram determinados os teores trocáveis de Ca (Ca tr), Mg (Mg tr), K (Ktr) e Al (Al tr) e o pH (CaCl2). Os ácidos cítrico e succínico aumentaram os teores de Al st e Ca s, respectivamente, causando reduções nas frações trocáveis desses elementos no solo. O extrato de aveia-preta foi mais efetivo na remoção do Ca tr e o de nabo forrageiro na do Al tr. O decréscimo de Ca tr e Al tr foi seguido do aumento do Ktr. A formação de complexos entre Ca s e Al tr com compostos orgânicos de baixo peso molecular foi sugerida como o provável mecanismo responsável pela mobilidade dos íons polivalentes no subsolo de solos ácidos após a aplicação dos extratos de resíduos vegetais e das soluções puras de ácidos orgânicos.<br<The influence of green manure residues addition in the dynamic of ions in acid soils is not well known. In this study, ion mobility in a sample of the Bw horizon of an Dark-Red Latosol (Oxisol), leached with citric and succinic acid pure solutions and with aqueous residue extracts of black oats (Avena strigosa) and oil seed radish (Raphanus sativus) were evaluated in soil columns (5, 10, 20, and 40 cm long by 4 cm diameter). After the solutions and extracts passed through the soil columns, the following parameters were determined: solubles contents of Ca s, Mg s, Ks, Al st (total), Al so (organic), Al sm (monomeric) and dissolved organic carbon. In soil, the parameters evaluated were the exchangeable contents of Ca ex, Mg ex, Kex, and Al ex and pH (CaCl2). Citric and succinic acids increased Al st and Ca s contents, respectively, resulting in decreasing exchangeable fractions of these elements in soil. Black oats extract was more effective to extract Ca ex and oil seed radish to extract Al ex. The decrease in Ca ex and Al ex was followed by an increase in Kex. Organic complexes formed with low molecular organic ligands and Ca s and Al ex were suggested to play a role in the mobility of ions in subsoils of acid soils after the addition of both crop residues extracts and pure organic acid solutions. |
abstractGer |
A influência da aplicação de resíduos vegetais na dinâmica de íons em solos ácidos é pouco conhecida. Neste estudo, a mobilidade de íons em amostra do horizonte Bw de um Latossolo Vermelho-Escuro álico lixiviado com soluções puras de ácidos cítrico e succínico e extratos aquosos de resíduos de nabo forrageiro (Raphanus sativus) e aveia-preta (Avena strigosa) foi avaliada em colunas de solo (5, 10, 20 e 40 cm de altura por 4 cm de diâmetro). Após a percolação das soluções e extratos pelas colunas de solo determinaram-se, nas soluções efluentes, os teores de Ca (Ca s), Mg (Mg s), K (Ks), Al total (Al st), orgânico (Al so), monomérico (Al sm) e carbono orgânico dissolvido. No solo, foram determinados os teores trocáveis de Ca (Ca tr), Mg (Mg tr), K (Ktr) e Al (Al tr) e o pH (CaCl2). Os ácidos cítrico e succínico aumentaram os teores de Al st e Ca s, respectivamente, causando reduções nas frações trocáveis desses elementos no solo. O extrato de aveia-preta foi mais efetivo na remoção do Ca tr e o de nabo forrageiro na do Al tr. O decréscimo de Ca tr e Al tr foi seguido do aumento do Ktr. A formação de complexos entre Ca s e Al tr com compostos orgânicos de baixo peso molecular foi sugerida como o provável mecanismo responsável pela mobilidade dos íons polivalentes no subsolo de solos ácidos após a aplicação dos extratos de resíduos vegetais e das soluções puras de ácidos orgânicos.<br<The influence of green manure residues addition in the dynamic of ions in acid soils is not well known. In this study, ion mobility in a sample of the Bw horizon of an Dark-Red Latosol (Oxisol), leached with citric and succinic acid pure solutions and with aqueous residue extracts of black oats (Avena strigosa) and oil seed radish (Raphanus sativus) were evaluated in soil columns (5, 10, 20, and 40 cm long by 4 cm diameter). After the solutions and extracts passed through the soil columns, the following parameters were determined: solubles contents of Ca s, Mg s, Ks, Al st (total), Al so (organic), Al sm (monomeric) and dissolved organic carbon. In soil, the parameters evaluated were the exchangeable contents of Ca ex, Mg ex, Kex, and Al ex and pH (CaCl2). Citric and succinic acids increased Al st and Ca s contents, respectively, resulting in decreasing exchangeable fractions of these elements in soil. Black oats extract was more effective to extract Ca ex and oil seed radish to extract Al ex. The decrease in Ca ex and Al ex was followed by an increase in Kex. Organic complexes formed with low molecular organic ligands and Ca s and Al ex were suggested to play a role in the mobility of ions in subsoils of acid soils after the addition of both crop residues extracts and pure organic acid solutions. |
abstract_unstemmed |
A influência da aplicação de resíduos vegetais na dinâmica de íons em solos ácidos é pouco conhecida. Neste estudo, a mobilidade de íons em amostra do horizonte Bw de um Latossolo Vermelho-Escuro álico lixiviado com soluções puras de ácidos cítrico e succínico e extratos aquosos de resíduos de nabo forrageiro (Raphanus sativus) e aveia-preta (Avena strigosa) foi avaliada em colunas de solo (5, 10, 20 e 40 cm de altura por 4 cm de diâmetro). Após a percolação das soluções e extratos pelas colunas de solo determinaram-se, nas soluções efluentes, os teores de Ca (Ca s), Mg (Mg s), K (Ks), Al total (Al st), orgânico (Al so), monomérico (Al sm) e carbono orgânico dissolvido. No solo, foram determinados os teores trocáveis de Ca (Ca tr), Mg (Mg tr), K (Ktr) e Al (Al tr) e o pH (CaCl2). Os ácidos cítrico e succínico aumentaram os teores de Al st e Ca s, respectivamente, causando reduções nas frações trocáveis desses elementos no solo. O extrato de aveia-preta foi mais efetivo na remoção do Ca tr e o de nabo forrageiro na do Al tr. O decréscimo de Ca tr e Al tr foi seguido do aumento do Ktr. A formação de complexos entre Ca s e Al tr com compostos orgânicos de baixo peso molecular foi sugerida como o provável mecanismo responsável pela mobilidade dos íons polivalentes no subsolo de solos ácidos após a aplicação dos extratos de resíduos vegetais e das soluções puras de ácidos orgânicos.<br<The influence of green manure residues addition in the dynamic of ions in acid soils is not well known. In this study, ion mobility in a sample of the Bw horizon of an Dark-Red Latosol (Oxisol), leached with citric and succinic acid pure solutions and with aqueous residue extracts of black oats (Avena strigosa) and oil seed radish (Raphanus sativus) were evaluated in soil columns (5, 10, 20, and 40 cm long by 4 cm diameter). After the solutions and extracts passed through the soil columns, the following parameters were determined: solubles contents of Ca s, Mg s, Ks, Al st (total), Al so (organic), Al sm (monomeric) and dissolved organic carbon. In soil, the parameters evaluated were the exchangeable contents of Ca ex, Mg ex, Kex, and Al ex and pH (CaCl2). Citric and succinic acids increased Al st and Ca s contents, respectively, resulting in decreasing exchangeable fractions of these elements in soil. Black oats extract was more effective to extract Ca ex and oil seed radish to extract Al ex. The decrease in Ca ex and Al ex was followed by an increase in Kex. Organic complexes formed with low molecular organic ligands and Ca s and Al ex were suggested to play a role in the mobility of ions in subsoils of acid soils after the addition of both crop residues extracts and pure organic acid solutions. |
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Dinâmica de íons em solo ácido lixiviado com extratos de resíduos de adubos verdes e soluções puras de ácidos orgânicos Dynamic of ions in acid soil leached with green manure residues extracts and pure solutions of organic acids |
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https://doi.org/10.1590/S0100-204X1999001200014 https://doaj.org/article/38999ac134a5488b97c251b0b78f25e7 http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X1999001200014 https://doaj.org/toc/0100-204X https://doaj.org/toc/1678-3921 |
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A formação de complexos entre Ca s e Al tr com compostos orgânicos de baixo peso molecular foi sugerida como o provável mecanismo responsável pela mobilidade dos íons polivalentes no subsolo de solos ácidos após a aplicação dos extratos de resíduos vegetais e das soluções puras de ácidos orgânicos.<br<The influence of green manure residues addition in the dynamic of ions in acid soils is not well known. In this study, ion mobility in a sample of the Bw horizon of an Dark-Red Latosol (Oxisol), leached with citric and succinic acid pure solutions and with aqueous residue extracts of black oats (Avena strigosa) and oil seed radish (Raphanus sativus) were evaluated in soil columns (5, 10, 20, and 40 cm long by 4 cm diameter). After the solutions and extracts passed through the soil columns, the following parameters were determined: solubles contents of Ca s, Mg s, Ks, Al st (total), Al so (organic), Al sm (monomeric) and dissolved organic carbon. In soil, the parameters evaluated were the exchangeable contents of Ca ex, Mg ex, Kex, and Al ex and pH (CaCl2). Citric and succinic acids increased Al st and Ca s contents, respectively, resulting in decreasing exchangeable fractions of these elements in soil. Black oats extract was more effective to extract Ca ex and oil seed radish to extract Al ex. The decrease in Ca ex and Al ex was followed by an increase in Kex. Organic complexes formed with low molecular organic ligands and Ca s and Al ex were suggested to play a role in the mobility of ions in subsoils of acid soils after the addition of both crop residues extracts and pure organic acid solutions.</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">complexos orgânicos</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">mobilidade de cátions</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">cálcio</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">alumínio</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">organic complexes</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">cation mobility</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">calcium</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield 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