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Registro Completo |
Biblioteca(s): |
Embrapa Meio Ambiente. |
Data corrente: |
14/01/2008 |
Data da última atualização: |
25/03/2014 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
PARAÍBA, L. C. |
Afiliação: |
Lourival Costa Paraíba, Embrapa Meio Ambiente. |
Título: |
Pesticide bioconcentration modeling for fruit trees. |
Ano de publicação: |
2007 |
Fonte/Imprenta: |
Chemosphere, Oxford, v. 66, n. 8, p. 1468-1475, 2007. |
Idioma: |
Inglês |
Conteúdo: |
The model presented allows simulating the pesticide concentration evolution in fruit trees and estimating the pesticide bioconcentration factor in fruits. Pesticides are non-ionic organic compounds that are degraded in soils cropped with woody species, fruit trees and other perennials. The model allows estimating the pesticide uptake by plants through the water transpiration stream and also the time in which maximum pesticide concentration occur in the fruits. The equation proposed presents the relationships between bioconcentration factor (BCF) and the following variables: plant water transpiration volume (Q), pesticide transpiration stream concentration factor (TSCF), pesticide stem-water partition coefficient (KWood,W), stem dry biomass (M) and pesticide dissipation rate in the soil?plant system (kEGS). The modeling started and was developed from a previous model ?Fruit Tree Model? (FTM), reported by Trapp and collaborators in 2003, to which was added the hypothesis that the pesticide degradation in the soil follows a first order kinetic equation. The FTM model for pesticides (FTM-p) was applied to a hypothetic mango plant cropping (Mangifera indica) treated with paclobutrazol (growth regulator) added to the soil. The model fitness was evaluated through the sensitivity analysis of the pesticide BCF values in fruits with respect to the model entry data variability. |
Thesagro: |
Agrotóxico; Contaminação; Manga; Modelo Matemático; Regulador de Crescimento. |
Categoria do assunto: |
-- |
Marc: |
LEADER 01877naa a2200181 a 4500 001 1015981 005 2014-03-25 008 2007 bl uuuu u00u1 u #d 100 1 $aPARAÍBA, L. C. 245 $aPesticide bioconcentration modeling for fruit trees. 260 $c2007 520 $aThe model presented allows simulating the pesticide concentration evolution in fruit trees and estimating the pesticide bioconcentration factor in fruits. Pesticides are non-ionic organic compounds that are degraded in soils cropped with woody species, fruit trees and other perennials. The model allows estimating the pesticide uptake by plants through the water transpiration stream and also the time in which maximum pesticide concentration occur in the fruits. The equation proposed presents the relationships between bioconcentration factor (BCF) and the following variables: plant water transpiration volume (Q), pesticide transpiration stream concentration factor (TSCF), pesticide stem-water partition coefficient (KWood,W), stem dry biomass (M) and pesticide dissipation rate in the soil?plant system (kEGS). The modeling started and was developed from a previous model ?Fruit Tree Model? (FTM), reported by Trapp and collaborators in 2003, to which was added the hypothesis that the pesticide degradation in the soil follows a first order kinetic equation. The FTM model for pesticides (FTM-p) was applied to a hypothetic mango plant cropping (Mangifera indica) treated with paclobutrazol (growth regulator) added to the soil. The model fitness was evaluated through the sensitivity analysis of the pesticide BCF values in fruits with respect to the model entry data variability. 650 $aAgrotóxico 650 $aContaminação 650 $aManga 650 $aModelo Matemático 650 $aRegulador de Crescimento 773 $tChemosphere, Oxford$gv. 66, n. 8, p. 1468-1475, 2007.
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Embrapa Meio Ambiente (CNPMA) |
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Biblioteca(s): |
Embrapa Unidades Centrais. |
Data corrente: |
28/08/2001 |
Data da última atualização: |
20/09/2004 |
Autoria: |
ALMEIDA, F. S. de. |
Título: |
Herbicidas Residuais em Diferentes Sistemas de Preparo do Solo. |
Ano de publicação: |
1992 |
Fonte/Imprenta: |
Pesquisa Agropecuaria Brasileira, Brasilia, v.27, n.4, p.595-601, abr.1992 |
Idioma: |
Português |
Conteúdo: |
Estudou-se a eficacia de controle de ervas daninhas pelos herbicidas de pro-emergencia oryzalin + metribuzin e cyanazine + metolachlor utilizados em soja (Glycine max, Merril) em plantio direto, em preparo reduzido do solo e em preparo convencional. A producao de soja obtida em preparo convencional foi superior a do preparo reduzido e a do plantio direto. |
Palavras-Chave: |
preparo reduzido. |
Thesagro: |
Cobertura Morta; Plantio Direto; Soja. |
Categoria do assunto: |
-- |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/AI-SEDE/20675/1/pab08_abr_92.pdf
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Marc: |
LEADER 00839naa a2200169 a 4500 001 1105610 005 2004-09-20 008 1992 bl uuuu u00u1 u #d 100 1 $aALMEIDA, F. S. de 245 $aHerbicidas Residuais em Diferentes Sistemas de Preparo do Solo. 260 $c1992 520 $aEstudou-se a eficacia de controle de ervas daninhas pelos herbicidas de pro-emergencia oryzalin + metribuzin e cyanazine + metolachlor utilizados em soja (Glycine max, Merril) em plantio direto, em preparo reduzido do solo e em preparo convencional. A producao de soja obtida em preparo convencional foi superior a do preparo reduzido e a do plantio direto. 650 $aCobertura Morta 650 $aPlantio Direto 650 $aSoja 653 $apreparo reduzido 773 $tPesquisa Agropecuaria Brasileira, Brasilia$gv.27, n.4, p.595-601, abr.1992
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