Sorção, dessorção, lixiviação e meia-vida do tebuthiuron em latosolos brasileiros
Autor(a) principal: | |
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Data de Publicação: | 2013 |
Tipo de documento: | Dissertação |
Idioma: | por |
Título da fonte: | LOCUS Repositório Institucional da UFV |
Texto Completo: | http://locus.ufv.br/handle/123456789/4626 |
Resumo: | In tropical conditions occurs variety of soil and climate. In this region there is little research on the behavior of herbicides in soils. Applications of these products without the knowledge of their interactions with soil properties and climatic conditions can be a cause of inefficiency agronomic observed infrequently, and the high risk of contamination of surface and groundwater. The tebuthiuron is one of the most commonly used herbicides in sugar cane in Brazil and its dynamics in tropical soils is poorly studied. Thus, it was held that this work was to evaluate the sorption, desorption, half-life and leaching of the herbicide tebuthiuron in Red -Yellow humic Latosol ( LVAh ), Typic. For this methods were used high performance liquid chromatography (HPLC ) and the results verified by biological methods . Three experiments were conducted, the first to determine the sorption and desorption of tebuthiuron latosols the second herbicide leaching in the soil profile and the third, the half -life in these soils. Sorption tebuthiuron followed the same trend in different soils, characterized in two phases. Initially, the sorption occurred more quickly, and then displaying a slower phase. The sorption was directly proportional to the amount of organic matter and clay soils. On the other hand, desorption was inversely proportional herbicide sorption. The leaching of tebuthiuron was higher in LV pH 5,0 and pH 6,2 and pH 6,3 LA , being reduced by higher levels of organic matter and clay . The degradation of tebuthiuron in soil followed an exponential model, and its half-life in soil is influenced by soil organic matter content, CEC and clay content. In LVA pH 5,0, the half -life of tebuthiuron was 155 days. On the same soil, with pH changed to 5,9, the half-life of this herbicide was 117 days after its application. It is concluded that the sorption, desorption and leaching half-life tebuthiuron are influenced by the chemical characteristics (CEC and organic matter) and physical (content of clay) soil. Organic matter increased the sorption and desorption and reduced leaching of tebuthiuron. On the other hand, in soils with higher CEC persistence tebuthiuron was reduced. Biological assays can be used to confirm the results of chromatography. |
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Faria, Autieres Teixeirahttp://lattes.cnpq.br/6064722550711181D'antonino, Leonardohttp://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4133365J5Queiroz, Maria Eliana Lopes Ribeiro dehttp://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4781671U3Silva, Antônio Alberto dahttp://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4787739T6Freitas, Francisco Cláudio Lopes dehttp://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4774458Z62015-03-26T13:40:02Z2014-05-152015-03-26T13:40:02Z2013-07-26FARIA, Autieres Teixeira. Sorption, desorption, leaching and half-life of tebuthiuron in Brazilian latosols. 2013. 71 f. Dissertação (Mestrado em Plantas daninhas, Alelopatia, Herbicidas e Resíduos; Fisiologia de culturas; Manejo pós-colheita de) - Universidade Federal de Viçosa, Viçosa, 2013.http://locus.ufv.br/handle/123456789/4626In tropical conditions occurs variety of soil and climate. In this region there is little research on the behavior of herbicides in soils. Applications of these products without the knowledge of their interactions with soil properties and climatic conditions can be a cause of inefficiency agronomic observed infrequently, and the high risk of contamination of surface and groundwater. The tebuthiuron is one of the most commonly used herbicides in sugar cane in Brazil and its dynamics in tropical soils is poorly studied. Thus, it was held that this work was to evaluate the sorption, desorption, half-life and leaching of the herbicide tebuthiuron in Red -Yellow humic Latosol ( LVAh ), Typic. For this methods were used high performance liquid chromatography (HPLC ) and the results verified by biological methods . Three experiments were conducted, the first to determine the sorption and desorption of tebuthiuron latosols the second herbicide leaching in the soil profile and the third, the half -life in these soils. Sorption tebuthiuron followed the same trend in different soils, characterized in two phases. Initially, the sorption occurred more quickly, and then displaying a slower phase. The sorption was directly proportional to the amount of organic matter and clay soils. On the other hand, desorption was inversely proportional herbicide sorption. The leaching of tebuthiuron was higher in LV pH 5,0 and pH 6,2 and pH 6,3 LA , being reduced by higher levels of organic matter and clay . The degradation of tebuthiuron in soil followed an exponential model, and its half-life in soil is influenced by soil organic matter content, CEC and clay content. In LVA pH 5,0, the half -life of tebuthiuron was 155 days. On the same soil, with pH changed to 5,9, the half-life of this herbicide was 117 days after its application. It is concluded that the sorption, desorption and leaching half-life tebuthiuron are influenced by the chemical characteristics (CEC and organic matter) and physical (content of clay) soil. Organic matter increased the sorption and desorption and reduced leaching of tebuthiuron. On the other hand, in soils with higher CEC persistence tebuthiuron was reduced. Biological assays can be used to confirm the results of chromatography.Nas condições tropicais ocorre grande variedade de solos e de clima. Nesta região são escassas as pesquisas sobre o comportamento dos herbicidas nos solos. Aplicações desses produtos sem o conhecimento de suas interações com os atributos dos solos e condições climáticas podem ser uma das causas da ineficiência agronômica, observadas com certa frequência, além dos elevados riscos de contaminação de águas superficiais e subterrâneas. O tebuthiuron é um dos herbicidas mais utilizados em cana-de-açúcar no Brasil e sua dinâmica nos solos tropicais é pouco estudada. Assim, realizou-se este trabalho que teve como objetivo avaliar a sorção, dessorção, meia-vida e lixiviação do herbicida tebuthiuron nos Latossolos Vermelho-Amarelo, Latossolo Vermelho-Amarelo húmico (LVAh), Latossolo Amarelo e Latossolo Vermelho. Para isso foram utilizados métodos de cromatografia liquida de alta eficiência (CLAE) sendo os resultados comprovados por métodos biológicos. Foram realizados três experimentos, sendo o primeiro para determinar a sorção e dessorção do tebuthiuron em latossolos, o segundo a lixiviação desse herbicida no perfil do solo e o terceiro, a sua meia-vida nesses solos. A sorção do tebuthiuron seguiu uma mesma tendência nos diferentes solos, caracterizando-se em duas fases. Numa fase inicial, a sorção ocorreu de forma mais rápida, e em seguida exibindo uma fase mais lenta. A sorção foi diretamente proporcional aos teores de matéria orgânica e argila nos solos. Por outro lado, a dessorção desse herbicida foi inversamente proporcional a sorção. A lixiviação do tebuthiuron foi maior nos LV pH 5,0 e pH 6,2 e LA pH 6,3, sendo reduzida por maiores teores de matéria orgânica e argila. A degradação do tebuthiuron no solo seguiu um modelo exponencial, e a sua meia-vida no solo foi influenciada pelo teor de matéria orgânica, CTC e teor de argila. No LVA pH 5,0, a meia-vida do tebuthiuron foi de 155 dias. No mesmo solo, com o pH alterado para 5,9, a meia-vida desse herbicida foi de 117 dias após sua aplicação. Conclui-se que a sorção, dessorção, meia-vida e lixiviação do tebuthiuron são influenciadas pelas características químicas (matéria orgânica e CTC) e físicas (teor de argila) do solo. A matéria orgânica aumentou a sorção e reduziu a dessorção e a lixiviação do tebuthiuron. Por outro lado em solos com maior CTC a persistência do tebuthiuron foi reduzida. Os ensaios biológicos podem ser utilizados na confirmação dos resultados da cromatografia.Coordenação de Aperfeiçoamento de Pessoal de Nível Superiorapplication/pdfporUniversidade Federal de ViçosaMestrado em FitotecniaUFVBRPlantas daninhas, Alelopatia, Herbicidas e Resíduos; Fisiologia de culturas; Manejo pós-colheita deHerbicidasDinâmica no soloCLAEBioensaio e eficiência técnica e ambientalHerbicidesDynamic soilCLAEBioassay and technical and environmental efficiencyCNPQ::CIENCIAS AGRARIAS::AGRONOMIA::FITOTECNIASorção, dessorção, lixiviação e meia-vida do tebuthiuron em latosolos brasileirosSorption, desorption, leaching and half-life of tebuthiuron in Brazilian latosolsinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisinfo:eu-repo/semantics/openAccessreponame:LOCUS Repositório Institucional da UFVinstname:Universidade Federal de Viçosa (UFV)instacron:UFVORIGINALtexto completo.pdfapplication/pdf725476https://locus.ufv.br//bitstream/123456789/4626/1/texto%20completo.pdf9dc70a80eac3e525b33e6bd8c01a137bMD51TEXTtexto completo.pdf.txttexto completo.pdf.txtExtracted texttext/plain120736https://locus.ufv.br//bitstream/123456789/4626/2/texto%20completo.pdf.txt4154033160783d23e3e1d4999957e49bMD52THUMBNAILtexto completo.pdf.jpgtexto completo.pdf.jpgIM Thumbnailimage/jpeg3574https://locus.ufv.br//bitstream/123456789/4626/3/texto%20completo.pdf.jpga321341918008d8ee6915870c8dc0b41MD53123456789/46262016-04-10 23:11:38.044oai:locus.ufv.br:123456789/4626Repositório InstitucionalPUBhttps://www.locus.ufv.br/oai/requestfabiojreis@ufv.bropendoar:21452016-04-11T02:11:38LOCUS Repositório Institucional da UFV - Universidade Federal de Viçosa (UFV)false |
dc.title.por.fl_str_mv |
Sorção, dessorção, lixiviação e meia-vida do tebuthiuron em latosolos brasileiros |
dc.title.alternative.eng.fl_str_mv |
Sorption, desorption, leaching and half-life of tebuthiuron in Brazilian latosols |
title |
Sorção, dessorção, lixiviação e meia-vida do tebuthiuron em latosolos brasileiros |
spellingShingle |
Sorção, dessorção, lixiviação e meia-vida do tebuthiuron em latosolos brasileiros Faria, Autieres Teixeira Herbicidas Dinâmica no solo CLAE Bioensaio e eficiência técnica e ambiental Herbicides Dynamic soil CLAE Bioassay and technical and environmental efficiency CNPQ::CIENCIAS AGRARIAS::AGRONOMIA::FITOTECNIA |
title_short |
Sorção, dessorção, lixiviação e meia-vida do tebuthiuron em latosolos brasileiros |
title_full |
Sorção, dessorção, lixiviação e meia-vida do tebuthiuron em latosolos brasileiros |
title_fullStr |
Sorção, dessorção, lixiviação e meia-vida do tebuthiuron em latosolos brasileiros |
title_full_unstemmed |
Sorção, dessorção, lixiviação e meia-vida do tebuthiuron em latosolos brasileiros |
title_sort |
Sorção, dessorção, lixiviação e meia-vida do tebuthiuron em latosolos brasileiros |
author |
Faria, Autieres Teixeira |
author_facet |
Faria, Autieres Teixeira |
author_role |
author |
dc.contributor.authorLattes.por.fl_str_mv |
http://lattes.cnpq.br/6064722550711181 |
dc.contributor.author.fl_str_mv |
Faria, Autieres Teixeira |
dc.contributor.advisor-co1.fl_str_mv |
D'antonino, Leonardo |
dc.contributor.advisor-co1Lattes.fl_str_mv |
http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4133365J5 |
dc.contributor.advisor-co2.fl_str_mv |
Queiroz, Maria Eliana Lopes Ribeiro de |
dc.contributor.advisor-co2Lattes.fl_str_mv |
http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4781671U3 |
dc.contributor.advisor1.fl_str_mv |
Silva, Antônio Alberto da |
dc.contributor.advisor1Lattes.fl_str_mv |
http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4787739T6 |
dc.contributor.referee1.fl_str_mv |
Freitas, Francisco Cláudio Lopes de |
dc.contributor.referee1Lattes.fl_str_mv |
http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4774458Z6 |
contributor_str_mv |
D'antonino, Leonardo Queiroz, Maria Eliana Lopes Ribeiro de Silva, Antônio Alberto da Freitas, Francisco Cláudio Lopes de |
dc.subject.por.fl_str_mv |
Herbicidas Dinâmica no solo CLAE Bioensaio e eficiência técnica e ambiental |
topic |
Herbicidas Dinâmica no solo CLAE Bioensaio e eficiência técnica e ambiental Herbicides Dynamic soil CLAE Bioassay and technical and environmental efficiency CNPQ::CIENCIAS AGRARIAS::AGRONOMIA::FITOTECNIA |
dc.subject.eng.fl_str_mv |
Herbicides Dynamic soil CLAE Bioassay and technical and environmental efficiency |
dc.subject.cnpq.fl_str_mv |
CNPQ::CIENCIAS AGRARIAS::AGRONOMIA::FITOTECNIA |
description |
In tropical conditions occurs variety of soil and climate. In this region there is little research on the behavior of herbicides in soils. Applications of these products without the knowledge of their interactions with soil properties and climatic conditions can be a cause of inefficiency agronomic observed infrequently, and the high risk of contamination of surface and groundwater. The tebuthiuron is one of the most commonly used herbicides in sugar cane in Brazil and its dynamics in tropical soils is poorly studied. Thus, it was held that this work was to evaluate the sorption, desorption, half-life and leaching of the herbicide tebuthiuron in Red -Yellow humic Latosol ( LVAh ), Typic. For this methods were used high performance liquid chromatography (HPLC ) and the results verified by biological methods . Three experiments were conducted, the first to determine the sorption and desorption of tebuthiuron latosols the second herbicide leaching in the soil profile and the third, the half -life in these soils. Sorption tebuthiuron followed the same trend in different soils, characterized in two phases. Initially, the sorption occurred more quickly, and then displaying a slower phase. The sorption was directly proportional to the amount of organic matter and clay soils. On the other hand, desorption was inversely proportional herbicide sorption. The leaching of tebuthiuron was higher in LV pH 5,0 and pH 6,2 and pH 6,3 LA , being reduced by higher levels of organic matter and clay . The degradation of tebuthiuron in soil followed an exponential model, and its half-life in soil is influenced by soil organic matter content, CEC and clay content. In LVA pH 5,0, the half -life of tebuthiuron was 155 days. On the same soil, with pH changed to 5,9, the half-life of this herbicide was 117 days after its application. It is concluded that the sorption, desorption and leaching half-life tebuthiuron are influenced by the chemical characteristics (CEC and organic matter) and physical (content of clay) soil. Organic matter increased the sorption and desorption and reduced leaching of tebuthiuron. On the other hand, in soils with higher CEC persistence tebuthiuron was reduced. Biological assays can be used to confirm the results of chromatography. |
publishDate |
2013 |
dc.date.issued.fl_str_mv |
2013-07-26 |
dc.date.available.fl_str_mv |
2014-05-15 2015-03-26T13:40:02Z |
dc.date.accessioned.fl_str_mv |
2015-03-26T13:40:02Z |
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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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dc.identifier.citation.fl_str_mv |
FARIA, Autieres Teixeira. Sorption, desorption, leaching and half-life of tebuthiuron in Brazilian latosols. 2013. 71 f. Dissertação (Mestrado em Plantas daninhas, Alelopatia, Herbicidas e Resíduos; Fisiologia de culturas; Manejo pós-colheita de) - Universidade Federal de Viçosa, Viçosa, 2013. |
dc.identifier.uri.fl_str_mv |
http://locus.ufv.br/handle/123456789/4626 |
identifier_str_mv |
FARIA, Autieres Teixeira. Sorption, desorption, leaching and half-life of tebuthiuron in Brazilian latosols. 2013. 71 f. Dissertação (Mestrado em Plantas daninhas, Alelopatia, Herbicidas e Resíduos; Fisiologia de culturas; Manejo pós-colheita de) - Universidade Federal de Viçosa, Viçosa, 2013. |
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Mestrado em Fitotecnia |
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UFV |
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BR |
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Plantas daninhas, Alelopatia, Herbicidas e Resíduos; Fisiologia de culturas; Manejo pós-colheita de |
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Universidade Federal de Viçosa |
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