Structural changes in latosols of the cerrado region: I - relationships between soil physical properties and least limiting water range

Detalhes bibliográficos
Autor(a) principal: Severiano, Eduardo da Costa
Data de Publicação: 2011
Outros Autores: Oliveira, Geraldo César de, Dias Júnior, Moacir de Souza, Costa, Katia Aparecida de Pinho, Silva, Fabiano Guimarães, Ferreira Filho, Silvio Marcos
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFLA
Texto Completo: http://repositorio.ufla.br/jspui/handle/1/37248
Resumo: The agricultural potential of Latosols of the Brazilian Cerrado region is high, but when intensively cultivated under inappropriate management systems, the porosity can be seriously reduced, leading to rapid soil degradation. Consequently, accelerated erosion and sedimentation of springs and creeks have been observed. Therefore, the objective of this study was to evaluate structural changes of Latosols in Rio Verde, Goiás, based on the Least Limiting Water Range (LLWR), and relationships between LLWR and other physical properties. Soil samples were collected from the B horizons of five oxidic Latosols representing the textural variability of the Latosols of the Cerrado biome. LLWR and other soil physical properties were determined at various soil compaction degrees induced by uniaxial compression. Soil compaction caused effects varying from enhanced plant growth due to higher water retention, to severe restriction of edaphic functions. Also, inverse relationships were observed between clay content and bulk density values (Bd) under different structural conditions. Bd values corresponding to critical soil macroporosity (BdcMAC) were more restrictive to a sustainable use of the studied Latosols than the critical Bd corresponding to LLWR (BdcLLWR). The high tolerable compression potential of these oxidic Latosols was related to the high aeration porosity associated to the granular structure.
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spelling Structural changes in latosols of the cerrado region: I - relationships between soil physical properties and least limiting water rangeAlterações estruturais de latossolos representativos da região do cerrado: I - relações entre propriedades físicas do solo e intervalo hídrico ótimoSoil compactionDegradation of agricultural soilsWater availabilitySoil textureCompactação do soloDegradação estruturalDisponibilidade hídricaTextura do soloThe agricultural potential of Latosols of the Brazilian Cerrado region is high, but when intensively cultivated under inappropriate management systems, the porosity can be seriously reduced, leading to rapid soil degradation. Consequently, accelerated erosion and sedimentation of springs and creeks have been observed. Therefore, the objective of this study was to evaluate structural changes of Latosols in Rio Verde, Goiás, based on the Least Limiting Water Range (LLWR), and relationships between LLWR and other physical properties. Soil samples were collected from the B horizons of five oxidic Latosols representing the textural variability of the Latosols of the Cerrado biome. LLWR and other soil physical properties were determined at various soil compaction degrees induced by uniaxial compression. Soil compaction caused effects varying from enhanced plant growth due to higher water retention, to severe restriction of edaphic functions. Also, inverse relationships were observed between clay content and bulk density values (Bd) under different structural conditions. Bd values corresponding to critical soil macroporosity (BdcMAC) were more restrictive to a sustainable use of the studied Latosols than the critical Bd corresponding to LLWR (BdcLLWR). The high tolerable compression potential of these oxidic Latosols was related to the high aeration porosity associated to the granular structure.Apesar do elevado potencial agrícola dos Latossolos da região do Cerrado brasileiro, quando inseridos no processo produtivo sob sistemas de manejo inadequados, o seu espaço poroso pode ser seriamente alterado, levando à sua rápida degradação. Como consequência, tem-se observado aceleração do processo erosivo e assoreamento dos mananciais associados na paisagem. Dessa forma, o presente trabalho teve por objetivo avaliar as alterações estruturais de Latossolos do município de Rio Verde, GO, por meio da caracterização do intervalo hídrico ótimo (IHO), e as relações entre IHO e demais propriedades físicas desses solos. O estudo foi conduzido utilizando-se amostras coletadas no horizonte Bw de cinco Latossolos oxídicos representativos da variabilidade textural observada nos Latossolos ocorrentes no bioma Cerrado. Foram determinados o IHO e os atributos físico-hídricos dos solos em diversos estados de compactação induzidos por compressão uniaxial. Os resultados indicaram que a compactação do solo resultou desde benefícios ao crescimento das plantas, relacionados ao aumento na retenção de água, até condições de severas restrições às suas funções edáficas, sendo observadas relações inversas entre o conteúdo de argila e os valores de densidade do solo (Ds) nas diversas condições estruturais. A Ds correspondente à macroporosidade crítica do solo (DscMAC) foi mais restritiva ao manejo sustentável dos Latossolos estudados que a Ds crítica correspondente ao IHO (DscIHO). A maior compactação permissível observada nesses Latossolos oxídicos deve-se à elevada porosidade de aeração conferida pela estrutura do tipo granular.Sociedade Brasileira de Ciência do Solo2019-10-16T13:39:57Z2019-10-16T13:39:57Z2011info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfSEVERIANO, E. da C. et al. Structural changes in latosols of the cerrado region: I - relationships between soil physical properties and least limiting water range. Revista Brasileira de Ciência do Solo, Viçosa, MG, v. 35, n. 3, May/June 2011.http://repositorio.ufla.br/jspui/handle/1/37248Revista Brasileira de Ciência do Soloreponame:Repositório Institucional da UFLAinstname:Universidade Federal de Lavras (UFLA)instacron:UFLAAttribution-NonCommercial 4.0 Internationalhttp://creativecommons.org/licenses/by-nc/4.0/info:eu-repo/semantics/openAccessSeveriano, Eduardo da CostaOliveira, Geraldo César deDias Júnior, Moacir de SouzaCosta, Katia Aparecida de PinhoSilva, Fabiano GuimarãesFerreira Filho, Silvio Marcoseng2019-10-16T13:40:29Zoai:localhost:1/37248Repositório InstitucionalPUBhttp://repositorio.ufla.br/oai/requestnivaldo@ufla.br || repositorio.biblioteca@ufla.bropendoar:2019-10-16T13:40:29Repositório Institucional da UFLA - Universidade Federal de Lavras (UFLA)false
dc.title.none.fl_str_mv Structural changes in latosols of the cerrado region: I - relationships between soil physical properties and least limiting water range
Alterações estruturais de latossolos representativos da região do cerrado: I - relações entre propriedades físicas do solo e intervalo hídrico ótimo
title Structural changes in latosols of the cerrado region: I - relationships between soil physical properties and least limiting water range
spellingShingle Structural changes in latosols of the cerrado region: I - relationships between soil physical properties and least limiting water range
Severiano, Eduardo da Costa
Soil compaction
Degradation of agricultural soils
Water availability
Soil texture
Compactação do solo
Degradação estrutural
Disponibilidade hídrica
Textura do solo
title_short Structural changes in latosols of the cerrado region: I - relationships between soil physical properties and least limiting water range
title_full Structural changes in latosols of the cerrado region: I - relationships between soil physical properties and least limiting water range
title_fullStr Structural changes in latosols of the cerrado region: I - relationships between soil physical properties and least limiting water range
title_full_unstemmed Structural changes in latosols of the cerrado region: I - relationships between soil physical properties and least limiting water range
title_sort Structural changes in latosols of the cerrado region: I - relationships between soil physical properties and least limiting water range
author Severiano, Eduardo da Costa
author_facet Severiano, Eduardo da Costa
Oliveira, Geraldo César de
Dias Júnior, Moacir de Souza
Costa, Katia Aparecida de Pinho
Silva, Fabiano Guimarães
Ferreira Filho, Silvio Marcos
author_role author
author2 Oliveira, Geraldo César de
Dias Júnior, Moacir de Souza
Costa, Katia Aparecida de Pinho
Silva, Fabiano Guimarães
Ferreira Filho, Silvio Marcos
author2_role author
author
author
author
author
dc.contributor.author.fl_str_mv Severiano, Eduardo da Costa
Oliveira, Geraldo César de
Dias Júnior, Moacir de Souza
Costa, Katia Aparecida de Pinho
Silva, Fabiano Guimarães
Ferreira Filho, Silvio Marcos
dc.subject.por.fl_str_mv Soil compaction
Degradation of agricultural soils
Water availability
Soil texture
Compactação do solo
Degradação estrutural
Disponibilidade hídrica
Textura do solo
topic Soil compaction
Degradation of agricultural soils
Water availability
Soil texture
Compactação do solo
Degradação estrutural
Disponibilidade hídrica
Textura do solo
description The agricultural potential of Latosols of the Brazilian Cerrado region is high, but when intensively cultivated under inappropriate management systems, the porosity can be seriously reduced, leading to rapid soil degradation. Consequently, accelerated erosion and sedimentation of springs and creeks have been observed. Therefore, the objective of this study was to evaluate structural changes of Latosols in Rio Verde, Goiás, based on the Least Limiting Water Range (LLWR), and relationships between LLWR and other physical properties. Soil samples were collected from the B horizons of five oxidic Latosols representing the textural variability of the Latosols of the Cerrado biome. LLWR and other soil physical properties were determined at various soil compaction degrees induced by uniaxial compression. Soil compaction caused effects varying from enhanced plant growth due to higher water retention, to severe restriction of edaphic functions. Also, inverse relationships were observed between clay content and bulk density values (Bd) under different structural conditions. Bd values corresponding to critical soil macroporosity (BdcMAC) were more restrictive to a sustainable use of the studied Latosols than the critical Bd corresponding to LLWR (BdcLLWR). The high tolerable compression potential of these oxidic Latosols was related to the high aeration porosity associated to the granular structure.
publishDate 2011
dc.date.none.fl_str_mv 2011
2019-10-16T13:39:57Z
2019-10-16T13:39:57Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv SEVERIANO, E. da C. et al. Structural changes in latosols of the cerrado region: I - relationships between soil physical properties and least limiting water range. Revista Brasileira de Ciência do Solo, Viçosa, MG, v. 35, n. 3, May/June 2011.
http://repositorio.ufla.br/jspui/handle/1/37248
identifier_str_mv SEVERIANO, E. da C. et al. Structural changes in latosols of the cerrado region: I - relationships between soil physical properties and least limiting water range. Revista Brasileira de Ciência do Solo, Viçosa, MG, v. 35, n. 3, May/June 2011.
url http://repositorio.ufla.br/jspui/handle/1/37248
dc.language.iso.fl_str_mv eng
language eng
dc.rights.driver.fl_str_mv Attribution-NonCommercial 4.0 International
http://creativecommons.org/licenses/by-nc/4.0/
info:eu-repo/semantics/openAccess
rights_invalid_str_mv Attribution-NonCommercial 4.0 International
http://creativecommons.org/licenses/by-nc/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Sociedade Brasileira de Ciência do Solo
publisher.none.fl_str_mv Sociedade Brasileira de Ciência do Solo
dc.source.none.fl_str_mv Revista Brasileira de Ciência do Solo
reponame:Repositório Institucional da UFLA
instname:Universidade Federal de Lavras (UFLA)
instacron:UFLA
instname_str Universidade Federal de Lavras (UFLA)
instacron_str UFLA
institution UFLA
reponame_str Repositório Institucional da UFLA
collection Repositório Institucional da UFLA
repository.name.fl_str_mv Repositório Institucional da UFLA - Universidade Federal de Lavras (UFLA)
repository.mail.fl_str_mv nivaldo@ufla.br || repositorio.biblioteca@ufla.br
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