The Influence of Carbosulfan Residue on Soil Enzymes Activity and Microbial
The effect of 4 different concentrations (2,8,20 and mg/kg) of Carbosulfan on soil microbial quantity,activity and functional diversity of communities were studied by incubation experiments.The results showed that actinomycetes in soil was significantly inhibited, bacteria and fungi in soil was slightly inhibited by carbosulfan residue.The activity of sucrose was promoted by 2,8 and 20 mg/kg concentration of carbosulfan residue, but it was restrained by 50 mg,/kg concentration.The activities of urease and alkaline phosphatase were inhibited by all the concentration of carbosulfan residue.The tendency of catalase activity was "suppression-promotion-suppression", which was treated by 2 mg/kg concentration of carbosulfan residue, however,it was greatly suppressed by 8,20,50 mg/kg concentration.After 7 d treatment,the AWCD value of low carbosulfan residual concentrations was lower than CK,but the AWCD value of high concentrations was higher than CK.After 14 d it returned to CK level.The Shannon indexes for each treatment group were different from CK at 7 d, and they went back to CK level at 14 d.The Simpson indexes were always same as CK at 7 d and 14 d.McIntosh value of 50 mg/kg concentration was higher than CK.
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万方数据
维普
