Escarificação e gessagem na descompactação do solo sob sistema plantio direto
Autor(a) principal: | |
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Data de Publicação: | 2017 |
Tipo de documento: | Dissertação |
Idioma: | por |
Título da fonte: | Repositório Institucional da UFG |
Texto Completo: | http://repositorio.bc.ufg.br/tede/handle/tede/6991 |
Resumo: | In areas under no-tillage system in Brazil’s Cerrado, compaction is becoming increasingly frequent. It is noticeable because there are changes in soil physical properties and in the root system as well as reduction in crop yields. The practices of scarification and gypsum application are alternatives to mitigate compaction. In this sense, the objective of this work was to evaluate the effects and length of scarification and gypsum application on soil physical and chemical properties and on soybean yield under a no-tillage system deployed 15 years ago. The study was divided into two steps. The first step consisted of the diagnosis of soil compaction in an area of 315 ha divided into a 63-point sampling grid, where each point represented five hectares in Joviânia, GO. In this area, moisture samples were collected and a penetrometer was used at each point of the mesh, in the 0.0-0.20 m and 0.20-0.40 m layers, in three periods: 1) prior to the scarification; 2) at 60 days after soil scarification; and 3) at 390 days after scarification. Based on the results found in the first step, one of the points of this area was selected to perform the second step of the work, which consisted in setting up 24 plots, divided into six randomized blocks, composed of four treatments: (C) = Control, (S) = Scarification, (G) = Gypsum application, (G+S) = Gypsum application and scarification. The following properties were determined: soil fertility (MOS, pH, H+Al, P, K, Ca and Mg), gravimetric moisture and physical indicators in four soil layers, in addition to soybean yield. The data were submitted to analysis of variance and when they were significant, Dunnet’s test was applied for comparison of treatments at the level of probability of 5% of error (p<0.05). These results show that scarification offered short-lasting benefits, because although there was a reduction in resistance to penetration at 60 days after scarification, these values already showed a significant increase in resistance to penetration at 390 days after scarification. Scarification affected macroporosity and total porosity positively in the 0-0,10 m layer. Macroporosity is a physical indicator of great influence in determining soybean yield under a no-tillage system. The use of agricultural gypsum resulted in increased root volume and deeper root systems. |
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Correchel, Vladiahttp://lattes.cnpq.br/4781536691286837Correchel, Vladiahttp://lattes.cnpq.br/4781536691286837Ribon, Adriana AparecidaLeandro, Wilson Mozenahttp://lattes.cnpq.br/7301700321026417Barros, Leonardo Rodrigues2017-03-22T12:40:14Z2017-02-21BARROS, L. R. Escarificação e gessagem na descompactação do solo sob sistema plantio direto. 2017. 62 f. Dissertação (Mestrado em Agronomia) - Universidade Federal de Goiás, Goiânia, 2017.http://repositorio.bc.ufg.br/tede/handle/tede/6991In areas under no-tillage system in Brazil’s Cerrado, compaction is becoming increasingly frequent. It is noticeable because there are changes in soil physical properties and in the root system as well as reduction in crop yields. The practices of scarification and gypsum application are alternatives to mitigate compaction. In this sense, the objective of this work was to evaluate the effects and length of scarification and gypsum application on soil physical and chemical properties and on soybean yield under a no-tillage system deployed 15 years ago. The study was divided into two steps. The first step consisted of the diagnosis of soil compaction in an area of 315 ha divided into a 63-point sampling grid, where each point represented five hectares in Joviânia, GO. In this area, moisture samples were collected and a penetrometer was used at each point of the mesh, in the 0.0-0.20 m and 0.20-0.40 m layers, in three periods: 1) prior to the scarification; 2) at 60 days after soil scarification; and 3) at 390 days after scarification. Based on the results found in the first step, one of the points of this area was selected to perform the second step of the work, which consisted in setting up 24 plots, divided into six randomized blocks, composed of four treatments: (C) = Control, (S) = Scarification, (G) = Gypsum application, (G+S) = Gypsum application and scarification. The following properties were determined: soil fertility (MOS, pH, H+Al, P, K, Ca and Mg), gravimetric moisture and physical indicators in four soil layers, in addition to soybean yield. The data were submitted to analysis of variance and when they were significant, Dunnet’s test was applied for comparison of treatments at the level of probability of 5% of error (p<0.05). These results show that scarification offered short-lasting benefits, because although there was a reduction in resistance to penetration at 60 days after scarification, these values already showed a significant increase in resistance to penetration at 390 days after scarification. Scarification affected macroporosity and total porosity positively in the 0-0,10 m layer. Macroporosity is a physical indicator of great influence in determining soybean yield under a no-tillage system. The use of agricultural gypsum resulted in increased root volume and deeper root systems.Nas áreas sob sistema plantio direto no Cerrado o processo de compactação vem se tornando cada vez mais frequente, sendo perceptível por alterações nos atributos físicos do solo, no sistema radicular e pela redução na produtividade das culturas. As práticas de escarificação e gessagem são alternativas para reduzir esta compactação. Nesse sentido, o presente trabalho teve por objetivo avaliar os efeitos e duração da escarificação e da gessagem nos atributos físicos e químicos do solo e na produtividade da soja cultivada em sistema plantio direto implantado há quinze anos. O estudo foi dividido em duas etapas. Na primeira etapa foi feito o diagnóstico da compactação do solo em uma área de 315 ha dividida em uma malha amostral com 63 pontos, onde cada ponto respresentava cinco hectares em Joviânia, GO. Nessa área foram coletadas amostras de umidade gravimétrica e realizadas penetrometrias em cada ponto da malha, nas camadas 0,0-0,20 m e 0,20-0,40 m, em três épocas: 1) antes da escarificação; 2) 60 dias após a escarificação do solo; e 3) 390 dias após a escarificação. Com base nos resultados obtidos na primeira etapa, foi selecionado um dos pontos dessa área para realização da segunda etapa do trabalho, que consistiu em instalar 24 parcelas, divididas em seis blocos casualizados, compostos por quatro tratamentos: (T) = Testemunha, (E) = Escarificação, (G) = Gessagem, (G+E) = Gessagem e escarificação, nos quais foram determinadas a fertilidade do solo (MOS, pH, H+Al, P, K, Ca e Mg ), umidade gravimétrica e indicadores físicos, em quatro camadas de solo, além da produtividade da soja. Os dados foram analisados por meio da análise de variância e quando significativo aplicou-se o teste de Dunnet para comparação dos tratamentos ao nível de probabilidade de 5% de erro (p<0,05). Os resultados mostram que os benefícios da escarificação foram de curto prazo, pois embora 60 dias após a escarificação tenha sido observada uma redução da resistência a penetração, aos 390 dias após a escarificação estes valores já apresentaram um incremento significativo da resistência a penetração. A escarificação afetou de forma positiva a macroporosidade e a porosidade total na camada 0-0,10 m. A macroporosidade é um indicador físico de grande influência na determinação da produtividade da soja em plantio direto. O uso do gesso agricola proporcionou um aumento no volume das raízes assim como sistemas radiculares mais profundos.Submitted by JÚLIO HEBER SILVA (julioheber@yahoo.com.br) on 2017-03-21T18:46:52Z No. of bitstreams: 2 Dissertação - Leonardo Rodrigues Barros - 2017.pdf: 2170703 bytes, checksum: 536c80600024e0977209454f08eebcd1 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5)Approved for entry into archive by Luciana Ferreira (lucgeral@gmail.com) on 2017-03-22T12:40:14Z (GMT) No. of bitstreams: 2 Dissertação - Leonardo Rodrigues Barros - 2017.pdf: 2170703 bytes, checksum: 536c80600024e0977209454f08eebcd1 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5)Made available in DSpace on 2017-03-22T12:40:14Z (GMT). No. of bitstreams: 2 Dissertação - Leonardo Rodrigues Barros - 2017.pdf: 2170703 bytes, checksum: 536c80600024e0977209454f08eebcd1 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Previous issue date: 2017-02-21Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPESapplication/pdfporUniversidade Federal de GoiásPrograma de Pós-graduação em Agronomia (EAEA)UFGBrasilEscola de Agronomia e Engenharia de Alimentos - EAEA (RG)http://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/openAccessDescompactaçãoImpedimento mecânicoSulfatoDecompressionMechanical impedimentSulphateAGRONOMIA::CIENCIA DO SOLOEscarificação e gessagem na descompactação do solo sob sistema plantio diretoScarification and gypsum application in soil decompaction under no-tillage systeminfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesis8421195611339883816006006006004500684695727928426-59198405272323756712075167498588264571reponame:Repositório Institucional da UFGinstname:Universidade Federal de Goiás (UFG)instacron:UFGLICENSElicense.txtlicense.txttext/plain; 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dc.title.por.fl_str_mv |
Escarificação e gessagem na descompactação do solo sob sistema plantio direto |
dc.title.alternative.eng.fl_str_mv |
Scarification and gypsum application in soil decompaction under no-tillage system |
title |
Escarificação e gessagem na descompactação do solo sob sistema plantio direto |
spellingShingle |
Escarificação e gessagem na descompactação do solo sob sistema plantio direto Barros, Leonardo Rodrigues Descompactação Impedimento mecânico Sulfato Decompression Mechanical impediment Sulphate AGRONOMIA::CIENCIA DO SOLO |
title_short |
Escarificação e gessagem na descompactação do solo sob sistema plantio direto |
title_full |
Escarificação e gessagem na descompactação do solo sob sistema plantio direto |
title_fullStr |
Escarificação e gessagem na descompactação do solo sob sistema plantio direto |
title_full_unstemmed |
Escarificação e gessagem na descompactação do solo sob sistema plantio direto |
title_sort |
Escarificação e gessagem na descompactação do solo sob sistema plantio direto |
author |
Barros, Leonardo Rodrigues |
author_facet |
Barros, Leonardo Rodrigues |
author_role |
author |
dc.contributor.advisor1.fl_str_mv |
Correchel, Vladia |
dc.contributor.advisor1Lattes.fl_str_mv |
http://lattes.cnpq.br/4781536691286837 |
dc.contributor.referee1.fl_str_mv |
Correchel, Vladia |
dc.contributor.referee1Lattes.fl_str_mv |
http://lattes.cnpq.br/4781536691286837 |
dc.contributor.referee2.fl_str_mv |
Ribon, Adriana Aparecida |
dc.contributor.referee3.fl_str_mv |
Leandro, Wilson Mozena |
dc.contributor.authorLattes.fl_str_mv |
http://lattes.cnpq.br/7301700321026417 |
dc.contributor.author.fl_str_mv |
Barros, Leonardo Rodrigues |
contributor_str_mv |
Correchel, Vladia Correchel, Vladia Ribon, Adriana Aparecida Leandro, Wilson Mozena |
dc.subject.por.fl_str_mv |
Descompactação Impedimento mecânico Sulfato |
topic |
Descompactação Impedimento mecânico Sulfato Decompression Mechanical impediment Sulphate AGRONOMIA::CIENCIA DO SOLO |
dc.subject.eng.fl_str_mv |
Decompression Mechanical impediment Sulphate |
dc.subject.cnpq.fl_str_mv |
AGRONOMIA::CIENCIA DO SOLO |
description |
In areas under no-tillage system in Brazil’s Cerrado, compaction is becoming increasingly frequent. It is noticeable because there are changes in soil physical properties and in the root system as well as reduction in crop yields. The practices of scarification and gypsum application are alternatives to mitigate compaction. In this sense, the objective of this work was to evaluate the effects and length of scarification and gypsum application on soil physical and chemical properties and on soybean yield under a no-tillage system deployed 15 years ago. The study was divided into two steps. The first step consisted of the diagnosis of soil compaction in an area of 315 ha divided into a 63-point sampling grid, where each point represented five hectares in Joviânia, GO. In this area, moisture samples were collected and a penetrometer was used at each point of the mesh, in the 0.0-0.20 m and 0.20-0.40 m layers, in three periods: 1) prior to the scarification; 2) at 60 days after soil scarification; and 3) at 390 days after scarification. Based on the results found in the first step, one of the points of this area was selected to perform the second step of the work, which consisted in setting up 24 plots, divided into six randomized blocks, composed of four treatments: (C) = Control, (S) = Scarification, (G) = Gypsum application, (G+S) = Gypsum application and scarification. The following properties were determined: soil fertility (MOS, pH, H+Al, P, K, Ca and Mg), gravimetric moisture and physical indicators in four soil layers, in addition to soybean yield. The data were submitted to analysis of variance and when they were significant, Dunnet’s test was applied for comparison of treatments at the level of probability of 5% of error (p<0.05). These results show that scarification offered short-lasting benefits, because although there was a reduction in resistance to penetration at 60 days after scarification, these values already showed a significant increase in resistance to penetration at 390 days after scarification. Scarification affected macroporosity and total porosity positively in the 0-0,10 m layer. Macroporosity is a physical indicator of great influence in determining soybean yield under a no-tillage system. The use of agricultural gypsum resulted in increased root volume and deeper root systems. |
publishDate |
2017 |
dc.date.accessioned.fl_str_mv |
2017-03-22T12:40:14Z |
dc.date.issued.fl_str_mv |
2017-02-21 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/masterThesis |
format |
masterThesis |
status_str |
publishedVersion |
dc.identifier.citation.fl_str_mv |
BARROS, L. R. Escarificação e gessagem na descompactação do solo sob sistema plantio direto. 2017. 62 f. Dissertação (Mestrado em Agronomia) - Universidade Federal de Goiás, Goiânia, 2017. |
dc.identifier.uri.fl_str_mv |
http://repositorio.bc.ufg.br/tede/handle/tede/6991 |
identifier_str_mv |
BARROS, L. R. Escarificação e gessagem na descompactação do solo sob sistema plantio direto. 2017. 62 f. Dissertação (Mestrado em Agronomia) - Universidade Federal de Goiás, Goiânia, 2017. |
url |
http://repositorio.bc.ufg.br/tede/handle/tede/6991 |
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por |
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http://creativecommons.org/licenses/by-nc-nd/4.0/ info:eu-repo/semantics/openAccess |
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Universidade Federal de Goiás |
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UFG |
dc.publisher.country.fl_str_mv |
Brasil |
dc.publisher.department.fl_str_mv |
Escola de Agronomia e Engenharia de Alimentos - EAEA (RG) |
publisher.none.fl_str_mv |
Universidade Federal de Goiás |
dc.source.none.fl_str_mv |
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MD5 MD5 MD5 MD5 MD5 |
repository.name.fl_str_mv |
Repositório Institucional da UFG - Universidade Federal de Goiás (UFG) |
repository.mail.fl_str_mv |
tasesdissertacoes.bc@ufg.br |
_version_ |
1798044398644101120 |