Structural changes and compressive behavior of a dystrophic clayey Red Latosol under different use and management systems

Detalhes bibliográficos
Autor(a) principal: Oliveira, Geraldo César de
Data de Publicação: 2003
Outros Autores: Junior, Moacir de Sousa Dias, Resck, Dimas Vital Siqueira, Curi, Nilton
Tipo de documento: Artigo
Idioma: por
Título da fonte: Pesquisa Agropecuária Brasileira (Online)
Texto Completo: https://seer.sct.embrapa.br/index.php/pab/article/view/6573
Resumo: One of the consequences of inadequate soil management is its compaction that causes the loss of its sustainability and reduction of its productivity. The objective of this study was to evaluate the structural changes and the compressive behavior of a Latosol (Oxisol) under native vegetation, "Cerrado" (C), no-till (NT) and conventional till (CT) system, after two decades of use. The undisturbed soil samples were used to characterize the soil bulk density, the porous space and to perform the uniaxial compression test. The disturbed soil samples were used for soil physical and chemical characterization analyses in the analyzed depth. The bulk density varied in the following order: NT = CT > C (0 to 5 cm) and CT > NT > C (20 to 30 cm). Organic matter data showed that in the C = NT > CT (0 to 5 cm) and C = NT = CT (20 to 30 cm), showing the NT capacity of increasing organic matter. The preconsolidation pressure changed in the following order: NT = C > CT (0 to 5 cm; tension -1,500 kPa), and CT > C = NT (20 to 30 cm; tension -1,500 kPa).
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spelling Structural changes and compressive behavior of a dystrophic clayey Red Latosol under different use and management systemsAlterações estruturais e comportamento compressivo de um Latossolo Vermelho distrófico argiloso sob diferentes sistemas de uso e manejodirect sowing; disc ploughs; soil density; soil pore system; pressureplantio direto; arado de disco; densidade do solo; porosidade do solo; pressãoOne of the consequences of inadequate soil management is its compaction that causes the loss of its sustainability and reduction of its productivity. The objective of this study was to evaluate the structural changes and the compressive behavior of a Latosol (Oxisol) under native vegetation, "Cerrado" (C), no-till (NT) and conventional till (CT) system, after two decades of use. The undisturbed soil samples were used to characterize the soil bulk density, the porous space and to perform the uniaxial compression test. The disturbed soil samples were used for soil physical and chemical characterization analyses in the analyzed depth. The bulk density varied in the following order: NT = CT > C (0 to 5 cm) and CT > NT > C (20 to 30 cm). Organic matter data showed that in the C = NT > CT (0 to 5 cm) and C = NT = CT (20 to 30 cm), showing the NT capacity of increasing organic matter. The preconsolidation pressure changed in the following order: NT = C > CT (0 to 5 cm; tension -1,500 kPa), and CT > C = NT (20 to 30 cm; tension -1,500 kPa).Uma das principais conseqüências do manejo inadequado do solo é a compactação, que leva à perda da sua sustentabilidade e à redução da produtividade. O objetivo deste estudo foi avaliar as alterações estruturais e o comportamento compressivo de um Latossolo Vermelho distrófico sob Cerrado (C), plantio direto (PD) e preparo com arado de discos (AD), após duas décadas de uso e manejo. Nas profundidades de 0-5 cm e 20-30 cm coletaram-se amostras indeformadas para medir a pressão de preconsolidação, densidade do solo e a sua porosidade, e amostras deformadas para a caracterização física e química do solo. A densidade do solo variou na seguinte ordem: PD = AD > C (0-5 cm) e AD > PD > C (20-30 cm). Os dados de matéria orgânica mostraram que C = PD > AD (0-5 cm) e C = PD = AD (20-30 cm), demonstrando a capacidade de incremento da matéria orgânica pelo PD. A pressão de preconsolidação variou na seguinte ordem: PD = C > AD (0-5 cm; tensão de -1.500 kPa), e AD > C = PD (20-30 cm; tensão de -1.500 kPa).Pesquisa Agropecuaria BrasileiraPesquisa Agropecuária BrasileiraOliveira, Geraldo César deJunior, Moacir de Sousa DiasResck, Dimas Vital SiqueiraCuri, Nilton2003-02-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://seer.sct.embrapa.br/index.php/pab/article/view/6573Pesquisa Agropecuaria Brasileira; v.38, n.2, fev. 2003; 291-299Pesquisa Agropecuária Brasileira; v.38, n.2, fev. 2003; 291-2991678-39210100-104xreponame:Pesquisa Agropecuária Brasileira (Online)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPAporhttps://seer.sct.embrapa.br/index.php/pab/article/view/6573/3630info:eu-repo/semantics/openAccess2010-08-16T18:00:18Zoai:ojs.seer.sct.embrapa.br:article/6573Revistahttp://seer.sct.embrapa.br/index.php/pabPRIhttps://old.scielo.br/oai/scielo-oai.phppab@sct.embrapa.br || sct.pab@embrapa.br1678-39210100-204Xopendoar:2010-08-16T18:00:18Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false
dc.title.none.fl_str_mv Structural changes and compressive behavior of a dystrophic clayey Red Latosol under different use and management systems
Alterações estruturais e comportamento compressivo de um Latossolo Vermelho distrófico argiloso sob diferentes sistemas de uso e manejo
title Structural changes and compressive behavior of a dystrophic clayey Red Latosol under different use and management systems
spellingShingle Structural changes and compressive behavior of a dystrophic clayey Red Latosol under different use and management systems
Oliveira, Geraldo César de
direct sowing; disc ploughs; soil density; soil pore system; pressure
plantio direto; arado de disco; densidade do solo; porosidade do solo; pressão
title_short Structural changes and compressive behavior of a dystrophic clayey Red Latosol under different use and management systems
title_full Structural changes and compressive behavior of a dystrophic clayey Red Latosol under different use and management systems
title_fullStr Structural changes and compressive behavior of a dystrophic clayey Red Latosol under different use and management systems
title_full_unstemmed Structural changes and compressive behavior of a dystrophic clayey Red Latosol under different use and management systems
title_sort Structural changes and compressive behavior of a dystrophic clayey Red Latosol under different use and management systems
author Oliveira, Geraldo César de
author_facet Oliveira, Geraldo César de
Junior, Moacir de Sousa Dias
Resck, Dimas Vital Siqueira
Curi, Nilton
author_role author
author2 Junior, Moacir de Sousa Dias
Resck, Dimas Vital Siqueira
Curi, Nilton
author2_role author
author
author
dc.contributor.none.fl_str_mv

dc.contributor.author.fl_str_mv Oliveira, Geraldo César de
Junior, Moacir de Sousa Dias
Resck, Dimas Vital Siqueira
Curi, Nilton
dc.subject.por.fl_str_mv direct sowing; disc ploughs; soil density; soil pore system; pressure
plantio direto; arado de disco; densidade do solo; porosidade do solo; pressão
topic direct sowing; disc ploughs; soil density; soil pore system; pressure
plantio direto; arado de disco; densidade do solo; porosidade do solo; pressão
description One of the consequences of inadequate soil management is its compaction that causes the loss of its sustainability and reduction of its productivity. The objective of this study was to evaluate the structural changes and the compressive behavior of a Latosol (Oxisol) under native vegetation, "Cerrado" (C), no-till (NT) and conventional till (CT) system, after two decades of use. The undisturbed soil samples were used to characterize the soil bulk density, the porous space and to perform the uniaxial compression test. The disturbed soil samples were used for soil physical and chemical characterization analyses in the analyzed depth. The bulk density varied in the following order: NT = CT > C (0 to 5 cm) and CT > NT > C (20 to 30 cm). Organic matter data showed that in the C = NT > CT (0 to 5 cm) and C = NT = CT (20 to 30 cm), showing the NT capacity of increasing organic matter. The preconsolidation pressure changed in the following order: NT = C > CT (0 to 5 cm; tension -1,500 kPa), and CT > C = NT (20 to 30 cm; tension -1,500 kPa).
publishDate 2003
dc.date.none.fl_str_mv 2003-02-01
dc.type.none.fl_str_mv
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv https://seer.sct.embrapa.br/index.php/pab/article/view/6573
url https://seer.sct.embrapa.br/index.php/pab/article/view/6573
dc.language.iso.fl_str_mv por
language por
dc.relation.none.fl_str_mv https://seer.sct.embrapa.br/index.php/pab/article/view/6573/3630
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Pesquisa Agropecuaria Brasileira
Pesquisa Agropecuária Brasileira
publisher.none.fl_str_mv Pesquisa Agropecuaria Brasileira
Pesquisa Agropecuária Brasileira
dc.source.none.fl_str_mv Pesquisa Agropecuaria Brasileira; v.38, n.2, fev. 2003; 291-299
Pesquisa Agropecuária Brasileira; v.38, n.2, fev. 2003; 291-299
1678-3921
0100-104x
reponame:Pesquisa Agropecuária Brasileira (Online)
instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
instacron:EMBRAPA
instname_str Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
instacron_str EMBRAPA
institution EMBRAPA
reponame_str Pesquisa Agropecuária Brasileira (Online)
collection Pesquisa Agropecuária Brasileira (Online)
repository.name.fl_str_mv Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
repository.mail.fl_str_mv pab@sct.embrapa.br || sct.pab@embrapa.br
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