Abstract:

Abstract: The author of this article adopted an acute toxicity method to measurate the semi-lethal concentration (LC50) of Eisenis foetida that were disposed in dean with different concentrations. The variation of E. foetida antioxidant enzymes activities toxic was tested by means of enzyme activity in this paper.The results showed that LC50 of 48 hours was 81.371 mg L-1. Compared with comparative groups, dean drugs had a significant effect on E. foetida SOD,CAT and POD activities (p＜0.05). The SOD and CAT activities in the animal specimen increased when they were disposed in low concentration dean (60.342-75.044 mg L-1). But SOD and CAT activities in the animal specimen decreased at different levels when concentrations of dean increased to 83.691 mg L-1.But it could bring out a decrease in the activities of POD firstly and then an increase. A conclusion was achieved that within certain range of concentrations, dean pouring into natural soil could cause coercion to E. foetida ,have an effect on normal behavior of animal individuals and even cause death of them, and they could also lead to direct and indirect influence on soil ecosystems and the subspecies which were fed by E.foetida.