Revista Brasileira De Herbicidas 2005; 4(2)
ADSORÇÃO DE ATRAZINA, DESETILATRAZINA E HIDROXIATRAZINA EM LATOSSOLO VERMELHO ESCURO SOB CERRADO E SOB PLANTIO DIRETO NO DISTRITO FEDERAL
DOI: 10.7824/rbh.v4i2.26
The environmental fate of a pesticide depends on many factors, among them the soil characteristics as mineralogy, soil chemistry and organic matter content. This study aims to verify how the adaptation of chemical and mineralogical properties of a dark red latosol from the Brazilian savanna under the continuous use of no till practice can affect its affinity to atrazine and two metabolites (deethylatrazine and hydroxyatrazine). Therefore, beyond the characterization of the cited parameters, batch studies were performed with both no till and native vegetation soils. The comparison between them showed that the changes in some soil properties due to agriculture use of it were enough to change significantly its affinity for the studied compounds. Atrazine and deethylatrazine showed significant affinity to the high organic matter content horizon, while deeper horizons with smaller amounts of organic matter atrazine sorption was neglectible, deethylatrazine was present, but in smaller amounts.
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