Data/hora: 04/06/2024 18:02:50

Biblioteca(s): | Embrapa Meio Ambiente.
Data corrente: | 14/01/2008
Data da última atualização: | 25/03/2014
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: | --
Registro original: | Embrapa Meio Ambiente (CNPMA)
Exemplares: | CNPMA - (7162-1) - UPC - AP - -- - Aq5 G2 - PAT 2007 - 2008.00016 - DIS