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KMID : 0903519900330020138
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Journal of the Korean Society of Agricultural Chemistry and Biotechnology
1990 Volume.33 No. 2 p.138 ~ p.142
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Effects of heavy metals on the degradation of fenitrothion , IBP , butachlor in flooded soil
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Abstract
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The effects of heavy metals Cd. Cu, Cr, Ni, and Zn on the degradation of the insecticide Fenitrothion (O, O-dimethyl O-4-nitro-m-tolyl phosphorothioate), the fungicide IBP (S-benzyl O, O-diisopropyl phosphorothioate), and the herbicide butachlor (N-butoxymetyl-2-chloro-2´, 6´-diethylacetanilide) in flooded soils were examined in the laboratory. The degradation of the 3 pesticides in soil was greatly inhibited by the amendment of the 5 heavy metals. The inhibition rate was high in the order of butachlor$gt;IBP$gt;fenitrothion. Populations of fenitrothion-and butachlor-degrading microbes, which were counted by the MPN method, were lower in heavy metals added soil than in the control soil. The effect of heavy metals on the degradation of the 3 pesticides in soil varied with the kind and concentration of heavy metals and the kind of pesticides.
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