ARGILA DISPERSA EM ÁGUA EM LATOSSOLOS APÓS LONGO TEMPO DE PLANTIO DIRETO

Detalhes bibliográficos
Autor(a) principal: Paula, Ariane Lentice de
Data de Publicação: 2017
Tipo de documento: Dissertação
Idioma: por
Título da fonte: Biblioteca Digital de Teses e Dissertações da UEPG
Texto Completo: http://tede2.uepg.br/jspui/handle/prefix/2308
Resumo: The water dispersible clay study contributes to monitoring possible improvements or deteriorations in soilstructure. This work aimed to evaluate water dispersible clay in Oxissols after a long time no tillage. The experiment was carried out at "Capão da Onça" School Farm, belonging to State University of Ponta Grossa-UEPG. A toposequence was identified in the area, and divided into three parts: upper third (UT), middle third (MT) Lower third (LT). In each toposequence, three systematic sampling was carried out, with a regular mesh of 5x4 m implantation, with 20 demarcated points, a meter distanced each other. The soil samples were collected with a metal cylinderin the superficial layer (0,00-0,05 m). The indicators of soil structural stability, readily dispersible clay (RDC), mechanically dispersed clay (MDC) and water dispersible clay (WDC) were determined. For RDC determination, the turbidimetry method was used. For MDC determination, the same procedure was followed for RDC, however, a longer sample shaking time was used. The WDC determination used the similar methodology for granulometric analysis determination, without chemical dispersant use. The RDC, MDC and WDC levels were correlated with physical and chemical soil attributes. The RDC showed correlation with clay, sand, P, K+, Ca2+ and Mg2+. MDC showed correlation with clay, sand, K+ and Mg2+, while WDC showed correlation only with Ca2+. The third toposequence components presented almost in RDC levels, and there was no difference between them. In these areas, when there is a brief increase in energy inputs, it was observed that the dispersion was approximately two or three times higher, when RDC and MDC levels are compared. However, MDC levels didn‟t differ in the proportions in the samples. When soil samples were subjected to high energy inputs, as in WDC case, the dispersion increased approximately fifteen times. These results suggest that, under field conditions, dispersion clay in these soil samples maybe primarily due to the effect external mechanical forces. It was concluded that these soils presented low clay dispersion. However, the dispersion can increase significantly if they are subjected to high energy inputs, for example the intense machine‟s traffic.
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spelling Giarola, Neyde Fabíola BalarezoCPF:92149014904http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4771980Y4Tormena, Cássio AntonioCPF:46127038987http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4765279H6Barbosa, Fabrício TondelloCPF:80357920082http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4730996A4CPF:044173259361http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K8578894H0Paula, Ariane Lentice de2017-07-25T19:31:04Z2017-07-132017-07-25T19:31:04Z2017-03-28PAULA, Ariane Lentice de. DISPERSIBLE CLAY IN OXISSOLS AFTER A LONG TIME OF NO TILLAGE. 2017. 68 f. Dissertação (Mestrado em Agricultura) - UNIVERSIDADE ESTADUAL DE PONTA GROSSA, Ponta Grossa, 2017.http://tede2.uepg.br/jspui/handle/prefix/2308The water dispersible clay study contributes to monitoring possible improvements or deteriorations in soilstructure. This work aimed to evaluate water dispersible clay in Oxissols after a long time no tillage. The experiment was carried out at "Capão da Onça" School Farm, belonging to State University of Ponta Grossa-UEPG. A toposequence was identified in the area, and divided into three parts: upper third (UT), middle third (MT) Lower third (LT). In each toposequence, three systematic sampling was carried out, with a regular mesh of 5x4 m implantation, with 20 demarcated points, a meter distanced each other. The soil samples were collected with a metal cylinderin the superficial layer (0,00-0,05 m). The indicators of soil structural stability, readily dispersible clay (RDC), mechanically dispersed clay (MDC) and water dispersible clay (WDC) were determined. For RDC determination, the turbidimetry method was used. For MDC determination, the same procedure was followed for RDC, however, a longer sample shaking time was used. The WDC determination used the similar methodology for granulometric analysis determination, without chemical dispersant use. The RDC, MDC and WDC levels were correlated with physical and chemical soil attributes. The RDC showed correlation with clay, sand, P, K+, Ca2+ and Mg2+. MDC showed correlation with clay, sand, K+ and Mg2+, while WDC showed correlation only with Ca2+. The third toposequence components presented almost in RDC levels, and there was no difference between them. In these areas, when there is a brief increase in energy inputs, it was observed that the dispersion was approximately two or three times higher, when RDC and MDC levels are compared. However, MDC levels didn‟t differ in the proportions in the samples. When soil samples were subjected to high energy inputs, as in WDC case, the dispersion increased approximately fifteen times. These results suggest that, under field conditions, dispersion clay in these soil samples maybe primarily due to the effect external mechanical forces. It was concluded that these soils presented low clay dispersion. However, the dispersion can increase significantly if they are subjected to high energy inputs, for example the intense machine‟s traffic.O estudo de argila dispersa em água contribui para o monitoramento de possíveis melhorias ou deteriorações na estrutura do solo. Este trabalho teve como objetivo avaliar argila dispersa em água em Latossolo após longo tempo de plantio direto. O experimento foi realizado na Fazenda Escola “Capão da Onça” pertencente a Universidade Estadual de Ponta Grossa-UEPG. Na área foi identificada uma topossequência quefoi dividida em três partes: Terço Superior (TS), Terço Médio (TM) e Terço Inferior (TI). Em cada terço realizou-se amostragem sistemática, com a implantação de uma malha regular de 5x4m, com 20 pontos demarcados, distanciados a cada metro. As amostras de solo foram coletadas na camada superficial (0,00–0,05 m), com auxílio de um cilindro metálico. Os indicadores de estabilidade estrutural do solo, argila prontamente dispersa em água (APDA), argila mecanicamente dispersa em água (AMDA) e argila dispersa em água (ADA) foram determinados. Para a determinação da APDA utilizou-se o método da turbidimetria. Para a determinação da AMDA seguiu-se o mesmo procedimento da APDA, com tempo maior para a agitação das amostras. A determinação da ADA utilizou a metodologia semelhante para a determinação da análise granulométrica, sem uso de dispersante químico.Os teores de APDA, AMDA e ADA foram correlacionados com atributos físicos e químicos do solo. A APDA apresentou correlação com a argila, areia, P, K+, Ca2+ e Mg2+. A AMDA apresentou correlação com argila, areia, K+ e Mg2+ enquanto que a ADA apresentou correlação apenas com o Ca2+. Os terços componentes da topossequência apresentaram teores quase nulos de APDA, não havendo diferença entre eles. Nestas áreas, quando se teve um breve aumento nas entradas de energia, observou-se que a dispersão foi aproximadamente duas a três vezes mais elevada, quando se compara os teores de APDA e AMDA. Contudo, os teores de AMDA não diferiram nas proporções amostradas. Quando se submeteu as amostras de solo a altas entradas de energias, como no caso da ADA, a dispersão aumentou aproximadamente quinze vezes. Estes resultados sugerem que, sob condições de campo, a dispersão de argila nestas amostras de solo, podem ser primeiramente advindas do efeito de forças mecânicas externas. Conclui-se que estes solos apresentam baixa dispersão de argila. No entanto, a dispersão pode aumentar significativamente se os mesmos forem submetidos a altas entradas de energias, a exemplo do intenso tráfego de máquinas.Made available in DSpace on 2017-07-25T19:31:04Z (GMT). No. of bitstreams: 1 Ariane Lentice de Paula.pdf: 1722376 bytes, checksum: c8624e6fac60c0feeda5de3290e79f6b (MD5) Previous issue date: 2017-03-28Coordenação de Aperfeiçoamento de Pessoal de Nível Superiorapplication/pdfporUNIVERSIDADE ESTADUAL DE PONTA GROSSAPrograma de Pós-Graduação em AgronomiaUEPGBRAgriculturaagregadosdispersãoestruturaaggregatesdispersionstructureCNPQ::CIENCIAS AGRARIAS::AGRONOMIAARGILA DISPERSA EM ÁGUA EM LATOSSOLOS APÓS LONGO TEMPO DE PLANTIO DIRETODISPERSIBLE CLAY IN OXISSOLS AFTER A LONG TIME OF NO TILLAGEinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisinfo:eu-repo/semantics/openAccessreponame:Biblioteca Digital de Teses e Dissertações da UEPGinstname:Universidade Estadual de Ponta Grossa (UEPG)instacron:UEPGORIGINALAriane Lentice de Paula.pdfapplication/pdf1722376http://tede2.uepg.br/jspui/bitstream/prefix/2308/1/Ariane%20Lentice%20de%20Paula.pdfc8624e6fac60c0feeda5de3290e79f6bMD51prefix/23082017-07-25 16:31:04.905oai:tede2.uepg.br:prefix/2308Biblioteca Digital de Teses e Dissertaçõeshttps://tede2.uepg.br/jspui/PUBhttp://tede2.uepg.br/oai/requestbicen@uepg.br||mv_fidelis@yahoo.com.bropendoar:2017-07-25T19:31:04Biblioteca Digital de Teses e Dissertações da UEPG - Universidade Estadual de Ponta Grossa (UEPG)false
dc.title.por.fl_str_mv ARGILA DISPERSA EM ÁGUA EM LATOSSOLOS APÓS LONGO TEMPO DE PLANTIO DIRETO
dc.title.alternative.eng.fl_str_mv DISPERSIBLE CLAY IN OXISSOLS AFTER A LONG TIME OF NO TILLAGE
title ARGILA DISPERSA EM ÁGUA EM LATOSSOLOS APÓS LONGO TEMPO DE PLANTIO DIRETO
spellingShingle ARGILA DISPERSA EM ÁGUA EM LATOSSOLOS APÓS LONGO TEMPO DE PLANTIO DIRETO
Paula, Ariane Lentice de
agregados
dispersão
estrutura
aggregates
dispersion
structure
CNPQ::CIENCIAS AGRARIAS::AGRONOMIA
title_short ARGILA DISPERSA EM ÁGUA EM LATOSSOLOS APÓS LONGO TEMPO DE PLANTIO DIRETO
title_full ARGILA DISPERSA EM ÁGUA EM LATOSSOLOS APÓS LONGO TEMPO DE PLANTIO DIRETO
title_fullStr ARGILA DISPERSA EM ÁGUA EM LATOSSOLOS APÓS LONGO TEMPO DE PLANTIO DIRETO
title_full_unstemmed ARGILA DISPERSA EM ÁGUA EM LATOSSOLOS APÓS LONGO TEMPO DE PLANTIO DIRETO
title_sort ARGILA DISPERSA EM ÁGUA EM LATOSSOLOS APÓS LONGO TEMPO DE PLANTIO DIRETO
author Paula, Ariane Lentice de
author_facet Paula, Ariane Lentice de
author_role author
dc.contributor.advisor1.fl_str_mv Giarola, Neyde Fabíola Balarezo
dc.contributor.advisor1ID.fl_str_mv CPF:92149014904
dc.contributor.advisor1Lattes.fl_str_mv http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4771980Y4
dc.contributor.referee1.fl_str_mv Tormena, Cássio Antonio
dc.contributor.referee1ID.fl_str_mv CPF:46127038987
dc.contributor.referee1Lattes.fl_str_mv http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4765279H6
dc.contributor.referee2.fl_str_mv Barbosa, Fabrício Tondello
dc.contributor.referee2ID.fl_str_mv CPF:80357920082
dc.contributor.referee2Lattes.fl_str_mv http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4730996A4
dc.contributor.authorID.fl_str_mv CPF:044173259361
dc.contributor.authorLattes.fl_str_mv http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K8578894H0
dc.contributor.author.fl_str_mv Paula, Ariane Lentice de
contributor_str_mv Giarola, Neyde Fabíola Balarezo
Tormena, Cássio Antonio
Barbosa, Fabrício Tondello
dc.subject.por.fl_str_mv agregados
dispersão
estrutura
topic agregados
dispersão
estrutura
aggregates
dispersion
structure
CNPQ::CIENCIAS AGRARIAS::AGRONOMIA
dc.subject.eng.fl_str_mv aggregates
dispersion
structure
dc.subject.cnpq.fl_str_mv CNPQ::CIENCIAS AGRARIAS::AGRONOMIA
description The water dispersible clay study contributes to monitoring possible improvements or deteriorations in soilstructure. This work aimed to evaluate water dispersible clay in Oxissols after a long time no tillage. The experiment was carried out at "Capão da Onça" School Farm, belonging to State University of Ponta Grossa-UEPG. A toposequence was identified in the area, and divided into three parts: upper third (UT), middle third (MT) Lower third (LT). In each toposequence, three systematic sampling was carried out, with a regular mesh of 5x4 m implantation, with 20 demarcated points, a meter distanced each other. The soil samples were collected with a metal cylinderin the superficial layer (0,00-0,05 m). The indicators of soil structural stability, readily dispersible clay (RDC), mechanically dispersed clay (MDC) and water dispersible clay (WDC) were determined. For RDC determination, the turbidimetry method was used. For MDC determination, the same procedure was followed for RDC, however, a longer sample shaking time was used. The WDC determination used the similar methodology for granulometric analysis determination, without chemical dispersant use. The RDC, MDC and WDC levels were correlated with physical and chemical soil attributes. The RDC showed correlation with clay, sand, P, K+, Ca2+ and Mg2+. MDC showed correlation with clay, sand, K+ and Mg2+, while WDC showed correlation only with Ca2+. The third toposequence components presented almost in RDC levels, and there was no difference between them. In these areas, when there is a brief increase in energy inputs, it was observed that the dispersion was approximately two or three times higher, when RDC and MDC levels are compared. However, MDC levels didn‟t differ in the proportions in the samples. When soil samples were subjected to high energy inputs, as in WDC case, the dispersion increased approximately fifteen times. These results suggest that, under field conditions, dispersion clay in these soil samples maybe primarily due to the effect external mechanical forces. It was concluded that these soils presented low clay dispersion. However, the dispersion can increase significantly if they are subjected to high energy inputs, for example the intense machine‟s traffic.
publishDate 2017
dc.date.accessioned.fl_str_mv 2017-07-25T19:31:04Z
dc.date.available.fl_str_mv 2017-07-13
2017-07-25T19:31:04Z
dc.date.issued.fl_str_mv 2017-03-28
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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dc.identifier.citation.fl_str_mv PAULA, Ariane Lentice de. DISPERSIBLE CLAY IN OXISSOLS AFTER A LONG TIME OF NO TILLAGE. 2017. 68 f. Dissertação (Mestrado em Agricultura) - UNIVERSIDADE ESTADUAL DE PONTA GROSSA, Ponta Grossa, 2017.
dc.identifier.uri.fl_str_mv http://tede2.uepg.br/jspui/handle/prefix/2308
identifier_str_mv PAULA, Ariane Lentice de. DISPERSIBLE CLAY IN OXISSOLS AFTER A LONG TIME OF NO TILLAGE. 2017. 68 f. Dissertação (Mestrado em Agricultura) - UNIVERSIDADE ESTADUAL DE PONTA GROSSA, Ponta Grossa, 2017.
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dc.publisher.program.fl_str_mv Programa de Pós-Graduação em Agronomia
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dc.publisher.department.fl_str_mv Agricultura
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