Effects of Chlorimuron-ethyl on Soil Microorganism Population and Soil Respiration Intensity

Effects of Chlorimuron-ethyl on soil microorganism population and soil respiration intensity was investigated.Results showed that bacteria and fungi growth were stimulated and actinomycetes growth was inhibited by Chlorimuron-ethyl.Fungi was dominant species by Chlorimuron-ethyl intimidation.Effect of Chlorimuron-ethyl on soil respiration was tested with closed or direct absorption method.The results showed that soil respiration intensity was slightly inhibited with the concentrations of 0.01,0.1,1,10g g-1 dried soil of Chlorimuron-ethyl,but could be recovered except 10g g-1 treatment.Soil respiration intensity was stimulated with Chlorimuron-ethyl of 100g g-1 and could not be recovered to normal level.According to risk assessment,Chlorimuron-ethyl should belong to non-poisonous pesticide.