Effects of pesticides metolachlor and S-metolachlor on soil microorganisms in aquisols of Southern China Ⅰ Catalase activity

Abstract

Abstract: This paper studied the effects of different concentrations (0,5,20,and 100 mg穔g^-1) metolachlor and its enantiomer S-metolachlor (Dual Gold) on soil catalase activity.The results showed that 20 mg穔g^-1 metolachlor had the most successive stimulating effect,5 mg穔g^-1 metolachlor had an inhibitory effect in the early period,while 100 mg穔g^-1 metolachlor had a stimulating effect in the late period.Different concentrations Dual Gold displayed a tendency stimulation-inhibition-stimulation.5 and 100 mg穔g^-1 metolachlor might have more damage on soil ecosystem than different concentrations Dual Gold.

Key words: Metolachlor, S-Metolachlor (Dual Gold), Chiral pesticide, Catalase activity, Soil microorganisms

CLC Number:

X131.1

References

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