RELATIONS BETWEEN DRY MATTER YIELD AND THE AMOUNTS OF NUTRIENTS EXPORTED BY Brachiaria brizantha ON SOILS UNDER THE "BARREIRÃO" CROPPING SYSTEM

Detalhes bibliográficos
Autor(a) principal: Magalhães, Roberto Toledo de
Data de Publicação: 2007
Outros Autores: Oliveira, Itamar Pereira de, Kliemann, Huberto José
Tipo de documento: Artigo
Idioma: por
Título da fonte: Pesquisa Agropecuária Tropical (Online)
Texto Completo: https://revistas.ufg.br/pat/article/view/2435
Resumo: The relation between dry matter yield and the nutrients exported by Brachiaria brizantha on a dystrophic Oxisol (Goiás, Brazil) was assessed in a pasture established after clearing an original Cerrado area. This pasture was established by applying 1.5 t/ha of calcitic lime and direct sowing of Brachiaria decumbens. After ten years, this pasture was renewed using the “Barreirão System”. In a single operation, rice was sowed at a depth of 3 cm to 5 cm together with B. brizantha, mixed with fertilizers, placed at a depth of 8 cm to10 cm. Areas where the system has been used from one to six years were compared with a native forest and a seventeen years-old traditional pasture as reference areas. Considering the amounts of exported nutrients from the system, the data allow us to conclude that to sustain productivity of the Barreirão System: a) nitrogen from soil organic matter, levels of exchangeable calcium, magnesium and potassium, and available phosphorus and zinc (extracted by Mehlich-1 method) are insufficient after four years of use; b) available iron, copper and manganese are sufficient to keep the system going longer than six years; c) no consistent relationship between potassium exported and dry matter yield was found.
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spelling RELATIONS BETWEEN DRY MATTER YIELD AND THE AMOUNTS OF NUTRIENTS EXPORTED BY Brachiaria brizantha ON SOILS UNDER THE "BARREIRÃO" CROPPING SYSTEMRELAÇÕES DA PRODUÇÃO DE MASSA SECA E AS QUANTIDADES DE NUTRIENTES EXPORTADOS POR Brachiaria brizantha EM SOLOS SOB O MANEJO PELO SISTEMA "BARREIRÃO"Pastagens tropicaisbraquiáriasmacro-nutrientesmicronutrientessistema Barreirãocerrado The relation between dry matter yield and the nutrients exported by Brachiaria brizantha on a dystrophic Oxisol (Goiás, Brazil) was assessed in a pasture established after clearing an original Cerrado area. This pasture was established by applying 1.5 t/ha of calcitic lime and direct sowing of Brachiaria decumbens. After ten years, this pasture was renewed using the “Barreirão System”. In a single operation, rice was sowed at a depth of 3 cm to 5 cm together with B. brizantha, mixed with fertilizers, placed at a depth of 8 cm to10 cm. Areas where the system has been used from one to six years were compared with a native forest and a seventeen years-old traditional pasture as reference areas. Considering the amounts of exported nutrients from the system, the data allow us to conclude that to sustain productivity of the Barreirão System: a) nitrogen from soil organic matter, levels of exchangeable calcium, magnesium and potassium, and available phosphorus and zinc (extracted by Mehlich-1 method) are insufficient after four years of use; b) available iron, copper and manganese are sufficient to keep the system going longer than six years; c) no consistent relationship between potassium exported and dry matter yield was found. Avaliaram-se as relações da produção de massa seca com a exportação de nutrientes num solo do tipo Latossolo Vermelho Escuro, distrófico, fase Cerrado, de textura franco-argilo-arenosa, em áreas de pastagem provenientes da abertura do cerrado original. Formou-se o pasto aplicando 1,5 t/ha de calcário calcítico e fazendo semeio direto com Brachiaria decumbens. Após dez anos de uso, renovou-se a pastagem através do “Sistema Barreirão”, corrigindo-a com 2,0 t/ha de calcário dolomítico. Numa única operação, semeou-se o arroz e a Brachiara brizantha e procedeu-se à adubação, nas profundidades de 3 a 5 cm e de 8 a 10 cm, respectivamente. Monitoraram-se áreas cujo tempo de implantação do sistema variava de um a seis anos, tendo como referências uma área de mata nativa e outra de dezessete anos de pastejo tradicional. Pelos dados obtidos conclui-se que, para manter a produtividade no sistema, em função dos nutrientes exportados pela pastagem: a) o nitrogênio da matéria orgânica do solo e os níveis de cálcio e magnésio e de fósforo e zinco disponíveis pelo extrator Mehlich-1 no solo são insuficientes a partir do quarto ano; b) o cobre, o ferro e o manganês disponíveis são suficientes por prazos maiores que seis anos; c) quanto à produção de massa seca e à exportação de potássio, não foi possível estabelecer relações coerentes entre ambas. PALAVRAS-CHAVE: Pastagens tropicais; braquiárias; macro-nutrientes; micronutrientes; sistema Barreirão; cerrado.Escola de Agronomia - Universidade Federal de Goiás2007-11-22info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionAvaliado por paresPesquisa experimentalapplication/savehttps://revistas.ufg.br/pat/article/view/2435Pesquisa Agropecuária Tropical [Agricultural Research in the Tropics]; v. 32, n. 1, Jan./Jun. 2002; 13-20Pesquisa Agropecuária Tropical (Agricultural Research in the Tropics); v. 32, n. 1, jan./jun. 2002; 13-20Pesquisa Agropecuária Tropical; v. 32, n. 1, jan./jun. 2002; 13-201983-4063reponame:Pesquisa Agropecuária Tropical (Online)instname:Universidade Federal de Goiás (UFG)instacron:UFGporhttps://revistas.ufg.br/pat/article/view/2435/2404Magalhães, Roberto Toledo deOliveira, Itamar Pereira deKliemann, Huberto Joséinfo:eu-repo/semantics/openAccess2020-02-26T23:56:43Zoai:ojs.revistas.ufg.br:article/2435Revistahttps://revistas.ufg.br/patPUBhttps://revistas.ufg.br/pat/oaiaseleguini.pat@gmail.com||mgoes@agro.ufg.br1983-40631517-6398opendoar:2024-05-21T19:55:09.223004Pesquisa Agropecuária Tropical (Online) - Universidade Federal de Goiás (UFG)true
dc.title.none.fl_str_mv RELATIONS BETWEEN DRY MATTER YIELD AND THE AMOUNTS OF NUTRIENTS EXPORTED BY Brachiaria brizantha ON SOILS UNDER THE "BARREIRÃO" CROPPING SYSTEM
RELAÇÕES DA PRODUÇÃO DE MASSA SECA E AS QUANTIDADES DE NUTRIENTES EXPORTADOS POR Brachiaria brizantha EM SOLOS SOB O MANEJO PELO SISTEMA "BARREIRÃO"
title RELATIONS BETWEEN DRY MATTER YIELD AND THE AMOUNTS OF NUTRIENTS EXPORTED BY Brachiaria brizantha ON SOILS UNDER THE "BARREIRÃO" CROPPING SYSTEM
spellingShingle RELATIONS BETWEEN DRY MATTER YIELD AND THE AMOUNTS OF NUTRIENTS EXPORTED BY Brachiaria brizantha ON SOILS UNDER THE "BARREIRÃO" CROPPING SYSTEM
Magalhães, Roberto Toledo de
Pastagens tropicais
braquiárias
macro-nutrientes
micronutrientes
sistema Barreirão
cerrado
title_short RELATIONS BETWEEN DRY MATTER YIELD AND THE AMOUNTS OF NUTRIENTS EXPORTED BY Brachiaria brizantha ON SOILS UNDER THE "BARREIRÃO" CROPPING SYSTEM
title_full RELATIONS BETWEEN DRY MATTER YIELD AND THE AMOUNTS OF NUTRIENTS EXPORTED BY Brachiaria brizantha ON SOILS UNDER THE "BARREIRÃO" CROPPING SYSTEM
title_fullStr RELATIONS BETWEEN DRY MATTER YIELD AND THE AMOUNTS OF NUTRIENTS EXPORTED BY Brachiaria brizantha ON SOILS UNDER THE "BARREIRÃO" CROPPING SYSTEM
title_full_unstemmed RELATIONS BETWEEN DRY MATTER YIELD AND THE AMOUNTS OF NUTRIENTS EXPORTED BY Brachiaria brizantha ON SOILS UNDER THE "BARREIRÃO" CROPPING SYSTEM
title_sort RELATIONS BETWEEN DRY MATTER YIELD AND THE AMOUNTS OF NUTRIENTS EXPORTED BY Brachiaria brizantha ON SOILS UNDER THE "BARREIRÃO" CROPPING SYSTEM
author Magalhães, Roberto Toledo de
author_facet Magalhães, Roberto Toledo de
Oliveira, Itamar Pereira de
Kliemann, Huberto José
author_role author
author2 Oliveira, Itamar Pereira de
Kliemann, Huberto José
author2_role author
author
dc.contributor.author.fl_str_mv Magalhães, Roberto Toledo de
Oliveira, Itamar Pereira de
Kliemann, Huberto José
dc.subject.por.fl_str_mv Pastagens tropicais
braquiárias
macro-nutrientes
micronutrientes
sistema Barreirão
cerrado
topic Pastagens tropicais
braquiárias
macro-nutrientes
micronutrientes
sistema Barreirão
cerrado
description The relation between dry matter yield and the nutrients exported by Brachiaria brizantha on a dystrophic Oxisol (Goiás, Brazil) was assessed in a pasture established after clearing an original Cerrado area. This pasture was established by applying 1.5 t/ha of calcitic lime and direct sowing of Brachiaria decumbens. After ten years, this pasture was renewed using the “Barreirão System”. In a single operation, rice was sowed at a depth of 3 cm to 5 cm together with B. brizantha, mixed with fertilizers, placed at a depth of 8 cm to10 cm. Areas where the system has been used from one to six years were compared with a native forest and a seventeen years-old traditional pasture as reference areas. Considering the amounts of exported nutrients from the system, the data allow us to conclude that to sustain productivity of the Barreirão System: a) nitrogen from soil organic matter, levels of exchangeable calcium, magnesium and potassium, and available phosphorus and zinc (extracted by Mehlich-1 method) are insufficient after four years of use; b) available iron, copper and manganese are sufficient to keep the system going longer than six years; c) no consistent relationship between potassium exported and dry matter yield was found.
publishDate 2007
dc.date.none.fl_str_mv 2007-11-22
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Avaliado por pares
Pesquisa experimental
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv https://revistas.ufg.br/pat/article/view/2435
url https://revistas.ufg.br/pat/article/view/2435
dc.language.iso.fl_str_mv por
language por
dc.relation.none.fl_str_mv https://revistas.ufg.br/pat/article/view/2435/2404
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/save
dc.publisher.none.fl_str_mv Escola de Agronomia - Universidade Federal de Goiás
publisher.none.fl_str_mv Escola de Agronomia - Universidade Federal de Goiás
dc.source.none.fl_str_mv Pesquisa Agropecuária Tropical [Agricultural Research in the Tropics]; v. 32, n. 1, Jan./Jun. 2002; 13-20
Pesquisa Agropecuária Tropical (Agricultural Research in the Tropics); v. 32, n. 1, jan./jun. 2002; 13-20
Pesquisa Agropecuária Tropical; v. 32, n. 1, jan./jun. 2002; 13-20
1983-4063
reponame:Pesquisa Agropecuária Tropical (Online)
instname:Universidade Federal de Goiás (UFG)
instacron:UFG
instname_str Universidade Federal de Goiás (UFG)
instacron_str UFG
institution UFG
reponame_str Pesquisa Agropecuária Tropical (Online)
collection Pesquisa Agropecuária Tropical (Online)
repository.name.fl_str_mv Pesquisa Agropecuária Tropical (Online) - Universidade Federal de Goiás (UFG)
repository.mail.fl_str_mv aseleguini.pat@gmail.com||mgoes@agro.ufg.br
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