Influence of repeated applications of glyphosate on its persistence and soil bioactivity

Pesquisa Agropecuária Brasileira

Mara Mercedes De Andréa¹  Terezinha Bonanho Peres¹  Luiz Carlos Luchini¹  Sheila Bazarin¹  Solange Papini¹  Marcus Barifouse Matallo¹  Vera Lucia Tedeschi Savoy¹ 

[1] ,Instituto BiológicoSão Paulo SP ,Brasil

关键词: pesticide residues;    mineralization;    dehydrogenases;    soil treatment;    resíduo de pesticida;    mineralização;    desidrogenase;    tratamento do solo;   

DOI  :  10.1590/S0100-204X2003001100012

来源: SciELO

【 摘 要 】

Pesticide degradation studies are essential to evaluate its impact in the environment and on non-target organisms. The effect of repeated soil applications of the herbicide glyphosate on its dissipation and on soil microorganisms was studied by radiometric and microbial techniques. Results indicated fast dissipation of the [14C]-glyphosate or [14C]metabolites extractable residues (half-life of 0.92±0.29 month), but increasing half-lives of total mineralization ranging from 2.2 to 3.4 months as the number of applications increased from 1 to 4. No significant correlation was found between 14CO2 production and dehydrogenase activity.

【 授权许可】

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