Propriedades físico-hídricas de solos siltosos sob plantio direto
Ano de defesa: | 2016 |
---|---|
Autor(a) principal: | |
Orientador(a): | |
Banca de defesa: | |
Tipo de documento: | Dissertação |
Tipo de acesso: | Acesso aberto |
Idioma: | por |
Instituição de defesa: |
Universidade de Passo Fundo
|
Programa de Pós-Graduação: |
Programa de Pós-Graduação em Agronomia
|
Departamento: |
Faculdade de Agronomia e Medicina Veterinária – FAMV
|
País: |
Brasil
|
Palavras-chave em Português: | |
Área do conhecimento CNPq: | |
Link de acesso: | http://tede.upf.br/jspui/handle/tede/1294 |
Resumo: | Compression is one of the causes of physical degradation in agricultural soils. To measure the soil’s compaction degree, only its density analysis (DS) is insufficient. This is explained on the grounds that its granulometric composition and its organic matter content (OM) are very variable. The soil relative density (RD) is an indicator that allows the compaction degree identification, and, therefore, enables comparison of soil and handlings. The DR is obtained by the ratio between the DS and its maximum density (DSMax). The objective is to verify the influence of silt on physical and hydraulic properties in Neossolos. Were collected samples with preserved and not preserved structure from 18 soil under no-tillage system of Rio Grande do Sul. It was determined the granulometric composition, MO content, DS, DSMax, DR, moisture in the field capacity (FC) and, in permanent wilting point (PWP), the porosity and pore diameter distribution. The results showed that DSMax reduced with the addition of silt and OM and that the clay and the clay+silt had no significant effect. The OM content influenced upon density of soil solids (DSS) and upon the optimum moisture content (OMC). The PDS decreased with silt and OM increasing. PAIN was not influenced by granulometric composition and OM content, and there was noticed differences among the DR determined from the real DSMax and the DR calculated by Dmax estimated by the clay content. The increase in DS reduced the total porosity, macroporosity and the microporosity and increased cryptoporosity. The silt content affects the silty soil physical and hydraulic properties differently than what is perceived in clayey soils. |
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Klein, Vilson Antonio38060809091http://lattes.cnpq.br/846928624103584002051025061http://lattes.cnpq.br/1024508885284708Broch, Djulia Taís2018-05-11T17:54:52Z2016-04-20BROCH, Djulia Taís. Propriedades físico-hídricas de solos siltosos sob plantio direto. 2016. 84 f. Dissertação (Mestrado em Agronomia) - Universidade de Passo Fundo, Passo Fundo, RS, 2016.http://tede.upf.br/jspui/handle/tede/1294Compression is one of the causes of physical degradation in agricultural soils. To measure the soil’s compaction degree, only its density analysis (DS) is insufficient. This is explained on the grounds that its granulometric composition and its organic matter content (OM) are very variable. The soil relative density (RD) is an indicator that allows the compaction degree identification, and, therefore, enables comparison of soil and handlings. The DR is obtained by the ratio between the DS and its maximum density (DSMax). The objective is to verify the influence of silt on physical and hydraulic properties in Neossolos. Were collected samples with preserved and not preserved structure from 18 soil under no-tillage system of Rio Grande do Sul. It was determined the granulometric composition, MO content, DS, DSMax, DR, moisture in the field capacity (FC) and, in permanent wilting point (PWP), the porosity and pore diameter distribution. The results showed that DSMax reduced with the addition of silt and OM and that the clay and the clay+silt had no significant effect. The OM content influenced upon density of soil solids (DSS) and upon the optimum moisture content (OMC). The PDS decreased with silt and OM increasing. PAIN was not influenced by granulometric composition and OM content, and there was noticed differences among the DR determined from the real DSMax and the DR calculated by Dmax estimated by the clay content. The increase in DS reduced the total porosity, macroporosity and the microporosity and increased cryptoporosity. The silt content affects the silty soil physical and hydraulic properties differently than what is perceived in clayey soils.A compactação é uma das causas de degradação física em solos agrícolas. Para mensuração do grau de compactação de um solo, somente sua análise de densidade (DS) é insuficiente. Isso é justificado em razão de que sua composição granulométrica e seu teor de matéria orgânica (MO) são muito variáveis. A densidade relativa (DR) do solo é um indicador que permite a identificação do grau de compactação e, por conseguinte, possibilita a comparação de solos e manejos. A DR é obtida pelo quociente entre a DS e a sua densidade máxima (Dsmáx). O objetivo do trabalho consiste em verificar a influência do silte nas propriedaTdes físico-hídricas em Neossolos. Foram coletadas amostras com estrutura preservada e não preservada de 18 solos do Rio Grande do Sul, sob sistema plantio direto. Determinaram-se a composição granulométrica, o teor de MO, a DS, a Dsmáx, a DR, a umidade na capacidade de campo (CC) e, no ponto de murcha permanente (PMP), a porosidade e a distribuição do diâmetro dos poros. Os resultados mostraram que a Dsmáx decresceu com o acréscimo de silte e de MO e que a argila e a argila+silte não apresentaram efeito significativo. O teor de MO exerceu influência sobre a densidade dos sólidos do solo (DSS) e a umidade ótima de compactação (UOC). A DS diminuiu com o aumento de silte e MO. A DR não foi influenciada pela composição granulométrica e teor de MO, tendo havido diferença entre a DR determinada a partir da Dsmáx real e a calculada pela Dsmáx estimada pelo teor de argila. O aumento da DS reduziu a porosidade total, macroporosidade e microporosidade e aumentou a criptoporosidade. O teor de silte afeta as propriedades físico-hídricas de solos siltosos de forma distinta do que o que se percebe em solos argilosos.Submitted by Aline Rezende (alinerezende@upf.br) on 2018-05-11T17:54:52Z No. of bitstreams: 1 2016DjuliaTaisBroch.pdf: 847744 bytes, checksum: a5f6f955403c915f4713434e91106463 (MD5)Made available in DSpace on 2018-05-11T17:54:52Z (GMT). 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dc.title.por.fl_str_mv |
Propriedades físico-hídricas de solos siltosos sob plantio direto |
dc.title.alternative.eng.fl_str_mv |
Physical and hydraulic properties of silt under no-till |
title |
Propriedades físico-hídricas de solos siltosos sob plantio direto |
spellingShingle |
Propriedades físico-hídricas de solos siltosos sob plantio direto Broch, Djulia Taís Solos - Degradação Solos CIENCIAS AGRARIAS::AGRONOMIA |
title_short |
Propriedades físico-hídricas de solos siltosos sob plantio direto |
title_full |
Propriedades físico-hídricas de solos siltosos sob plantio direto |
title_fullStr |
Propriedades físico-hídricas de solos siltosos sob plantio direto |
title_full_unstemmed |
Propriedades físico-hídricas de solos siltosos sob plantio direto |
title_sort |
Propriedades físico-hídricas de solos siltosos sob plantio direto |
author |
Broch, Djulia Taís |
author_facet |
Broch, Djulia Taís |
author_role |
author |
dc.contributor.advisor1.fl_str_mv |
Klein, Vilson Antonio |
dc.contributor.advisor1ID.fl_str_mv |
38060809091 |
dc.contributor.advisor1Lattes.fl_str_mv |
http://lattes.cnpq.br/8469286241035840 |
dc.contributor.authorID.fl_str_mv |
02051025061 |
dc.contributor.authorLattes.fl_str_mv |
http://lattes.cnpq.br/1024508885284708 |
dc.contributor.author.fl_str_mv |
Broch, Djulia Taís |
contributor_str_mv |
Klein, Vilson Antonio |
dc.subject.por.fl_str_mv |
Solos - Degradação Solos |
topic |
Solos - Degradação Solos CIENCIAS AGRARIAS::AGRONOMIA |
dc.subject.cnpq.fl_str_mv |
CIENCIAS AGRARIAS::AGRONOMIA |
description |
Compression is one of the causes of physical degradation in agricultural soils. To measure the soil’s compaction degree, only its density analysis (DS) is insufficient. This is explained on the grounds that its granulometric composition and its organic matter content (OM) are very variable. The soil relative density (RD) is an indicator that allows the compaction degree identification, and, therefore, enables comparison of soil and handlings. The DR is obtained by the ratio between the DS and its maximum density (DSMax). The objective is to verify the influence of silt on physical and hydraulic properties in Neossolos. Were collected samples with preserved and not preserved structure from 18 soil under no-tillage system of Rio Grande do Sul. It was determined the granulometric composition, MO content, DS, DSMax, DR, moisture in the field capacity (FC) and, in permanent wilting point (PWP), the porosity and pore diameter distribution. The results showed that DSMax reduced with the addition of silt and OM and that the clay and the clay+silt had no significant effect. The OM content influenced upon density of soil solids (DSS) and upon the optimum moisture content (OMC). The PDS decreased with silt and OM increasing. PAIN was not influenced by granulometric composition and OM content, and there was noticed differences among the DR determined from the real DSMax and the DR calculated by Dmax estimated by the clay content. The increase in DS reduced the total porosity, macroporosity and the microporosity and increased cryptoporosity. The silt content affects the silty soil physical and hydraulic properties differently than what is perceived in clayey soils. |
publishDate |
2016 |
dc.date.issued.fl_str_mv |
2016-04-20 |
dc.date.accessioned.fl_str_mv |
2018-05-11T17:54:52Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/masterThesis |
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masterThesis |
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publishedVersion |
dc.identifier.citation.fl_str_mv |
BROCH, Djulia Taís. Propriedades físico-hídricas de solos siltosos sob plantio direto. 2016. 84 f. Dissertação (Mestrado em Agronomia) - Universidade de Passo Fundo, Passo Fundo, RS, 2016. |
dc.identifier.uri.fl_str_mv |
http://tede.upf.br/jspui/handle/tede/1294 |
identifier_str_mv |
BROCH, Djulia Taís. Propriedades físico-hídricas de solos siltosos sob plantio direto. 2016. 84 f. Dissertação (Mestrado em Agronomia) - Universidade de Passo Fundo, Passo Fundo, RS, 2016. |
url |
http://tede.upf.br/jspui/handle/tede/1294 |
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por |
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por |
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openAccess |
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Universidade de Passo Fundo |
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Programa de Pós-Graduação em Agronomia |
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UPF |
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Brasil |
dc.publisher.department.fl_str_mv |
Faculdade de Agronomia e Medicina Veterinária – FAMV |
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Universidade de Passo Fundo |
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