Abstract
To investigate the effects of different concentrations of chlorpyrifos on soil ecological environment and on soil respiration, catalase, urease, and levansucrase activity, studied by laboratory simulation methods. The results showed that: different concentrations of chlorpyrifos on soil respiration has a significant activation effect only at the first day, and a positive correlation with the concentration; different concentrations of chlorpyrifos on soil catalase activity is not significant; the inhibition of soil urease is not significant at the concentration of 10mg/kg, while the inhibition is significant at 100mg/kg and 500mg/kg; no significant effects on the soil levansucrase activity when the concentration is 10mg/kg in the first 10 days, but significant in the later days and the situation is contrary to the above when the chlorpyrifos concentration is 100mg/kg and 500mg/kg.
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