Spatial variability of soil phosphorus of a low productivity Brachiaria brizantha pasture

Studies on soil phosphorus (P) of low productivity cultivated pastures in Cerrado (Brazilian Savanna) areas and surveys on other possible problems related to P are scarce. The spatial variability of soil phosphorus content of a Rhodic Ferralsol was studied in a low productivity pasture of Brachiaria...
Ausführliche Beschreibung

Gespeichert in:

Autor*in:	Edemar Joaquim Corazza [verfasserIn] Michel Brossard [verfasserIn] Takashi MuraokaI [verfasserIn] Maurício Antonio Coelho Filho [verfasserIn]

Format:	E-Artikel
Sprache:	Englisch ; Spanisch ; Portugiesisch

Erschienen:	2003

Schlagwörter:	resin-extractable P fertilization tussock isotopic exchange kinetics phosphate

Übergeordnetes Werk:	In: Scientia Agricola - Universidade de São Paulo, 2004, 60(2003), 3, Seite 559-564
Übergeordnetes Werk:	volume:60 ; year:2003 ; number:3 ; pages:559-564

Links:	Link aufrufen Link aufrufen Journal toc

Katalog-ID:	DOAJ07361873X

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language	English Spanish Portuguese
source	In Scientia Agricola 60(2003), 3, Seite 559-564 volume:60 year:2003 number:3 pages:559-564
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topic_facet	resin-extractable P fertilization tussock isotopic exchange kinetics phosphate Agriculture (General)
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authorswithroles_txt_mv	Edemar Joaquim Corazza @@aut@@ Michel Brossard @@aut@@ Takashi MuraokaI @@aut@@ Maurício Antonio Coelho Filho @@aut@@
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callnumber-first	S - Agriculture
author	Edemar Joaquim Corazza
spellingShingle	Edemar Joaquim Corazza misc S1-972 misc resin-extractable P misc fertilization misc tussock misc isotopic exchange kinetics misc phosphate misc Agriculture (General) Spatial variability of soil phosphorus of a low productivity Brachiaria brizantha pasture
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topic_title	S1-972 Spatial variability of soil phosphorus of a low productivity Brachiaria brizantha pasture resin-extractable P fertilization tussock isotopic exchange kinetics phosphate
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title	Spatial variability of soil phosphorus of a low productivity Brachiaria brizantha pasture
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title_full	Spatial variability of soil phosphorus of a low productivity Brachiaria brizantha pasture
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title_sort	spatial variability of soil phosphorus of a low productivity brachiaria brizantha pasture
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title_auth	Spatial variability of soil phosphorus of a low productivity Brachiaria brizantha pasture
abstract	Studies on soil phosphorus (P) of low productivity cultivated pastures in Cerrado (Brazilian Savanna) areas and surveys on other possible problems related to P are scarce. The spatial variability of soil phosphorus content of a Rhodic Ferralsol was studied in a low productivity pasture of Brachiaria brizantha (BB) grown for 10 years, without fertilizer application, in an experimental area at Planaltina (GO), Brazil. Soil samplings were performed on a regular grid of 10 by 10 meters, with 98 sampling points before (between tussocks and under tussocks) and after the establishment of the experiment (after fertilizing). On the same grid, forage plants were collected and separated into fractions for N and P content analyses. Soil available phosphate was determined by the resin method (Pr) and complemented by the 32P isotopic exchange kinetics analysis. Descriptive statistical and geostatistical analyses were utilized to describe the spatial variability. The Pr content on soil samples under tussocks presented mean and median values 45% larger than in soil samples taken between tussocks. The higher variation is probably related to the greater concentration of BB roots, soil organic matter content and soil P recycled through the plants tussocks. The spatial variability of Pr in this soil was high especially after fertilizer application. This variable did not present spatial dependence for the regular 10 m sampling. The generated knowledge on P variability of soils under low productivity cultivated pastures revealed problems related to the sampling methodology traditionally utilized and to P application.
abstractGer	Studies on soil phosphorus (P) of low productivity cultivated pastures in Cerrado (Brazilian Savanna) areas and surveys on other possible problems related to P are scarce. The spatial variability of soil phosphorus content of a Rhodic Ferralsol was studied in a low productivity pasture of Brachiaria brizantha (BB) grown for 10 years, without fertilizer application, in an experimental area at Planaltina (GO), Brazil. Soil samplings were performed on a regular grid of 10 by 10 meters, with 98 sampling points before (between tussocks and under tussocks) and after the establishment of the experiment (after fertilizing). On the same grid, forage plants were collected and separated into fractions for N and P content analyses. Soil available phosphate was determined by the resin method (Pr) and complemented by the 32P isotopic exchange kinetics analysis. Descriptive statistical and geostatistical analyses were utilized to describe the spatial variability. The Pr content on soil samples under tussocks presented mean and median values 45% larger than in soil samples taken between tussocks. The higher variation is probably related to the greater concentration of BB roots, soil organic matter content and soil P recycled through the plants tussocks. The spatial variability of Pr in this soil was high especially after fertilizer application. This variable did not present spatial dependence for the regular 10 m sampling. The generated knowledge on P variability of soils under low productivity cultivated pastures revealed problems related to the sampling methodology traditionally utilized and to P application.
abstract_unstemmed	Studies on soil phosphorus (P) of low productivity cultivated pastures in Cerrado (Brazilian Savanna) areas and surveys on other possible problems related to P are scarce. The spatial variability of soil phosphorus content of a Rhodic Ferralsol was studied in a low productivity pasture of Brachiaria brizantha (BB) grown for 10 years, without fertilizer application, in an experimental area at Planaltina (GO), Brazil. Soil samplings were performed on a regular grid of 10 by 10 meters, with 98 sampling points before (between tussocks and under tussocks) and after the establishment of the experiment (after fertilizing). On the same grid, forage plants were collected and separated into fractions for N and P content analyses. Soil available phosphate was determined by the resin method (Pr) and complemented by the 32P isotopic exchange kinetics analysis. Descriptive statistical and geostatistical analyses were utilized to describe the spatial variability. The Pr content on soil samples under tussocks presented mean and median values 45% larger than in soil samples taken between tussocks. The higher variation is probably related to the greater concentration of BB roots, soil organic matter content and soil P recycled through the plants tussocks. The spatial variability of Pr in this soil was high especially after fertilizer application. This variable did not present spatial dependence for the regular 10 m sampling. The generated knowledge on P variability of soils under low productivity cultivated pastures revealed problems related to the sampling methodology traditionally utilized and to P application.
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title_short	Spatial variability of soil phosphorus of a low productivity Brachiaria brizantha pasture
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Spatial variability of soil phosphorus of a low productivity Brachiaria brizantha pasture

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