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| - Influence of Microbial Inoculation (Pseudomonas Sp. StrainADP), the Enzyme Atrazine Chlorohydrolase, and Vegetation onthe Degradation of Atrazine and Metolachlor in Soil
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| - The concentrations of atrazine in the freshly added soils and the soils that had been incubated for 50days significantly decreased 1 day after the addition of the enzyme atrazine chlorohydrolase or thesoil bacterium Pseudomonas sp. strain ADP as compared with those in the uninoculated soils. Atrazinechlorohydrolase or ADP had no effect on the degradation of metolachlor. The half-lives of atrazine inthe freshly added soils and in the aged soils after the treatment with atrazine chlorohydrolase orADP markedly decreased as compared with those in the uninoculated soils. The half-lives ofmetolachlor in the aged soils were much longer than those of freshly added metolachlor. Thepercentage atrazine degraded in the freshly treated soils was much higher than that in the agedsoils. This indicates that aging significantly decreased the bioavailability of atrazine. Vegetationsignificantly decreased the concentration of metolachlor. However, vegetation showed no effect onthe degradation of atrazine. Keywords: Atrazine; metolachlor; atrazine chlorohydrolase; Pseudomonas sp. strain ADP; vegetation;bioavailability
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