期刊
PESQUISA AGROPECUARIA BRASILEIRA
卷 38, 期 11, 页码 1329-1335出版社
EMPRESA BRASIL PESQ AGROPEC
DOI: 10.1590/S0100-204X2003001100012
关键词
pesticide residues; mineralization; dehydrogenases; soil treatment
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 [C-14]-glyphosate or [C-14]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 (CO2)-C-14 production and dehydrogenase activity.
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