克无踪除草剂对农田生态系统土壤动物的影响

Effects of Paraquat Herbicide on Soil Animal in Agroecosystem

应用克无踪农药对农田生态系统土壤动物进行污染模拟实验。本次实验共获得土壤动物 1 2 91个 ,隶属 3门、7纲。结果表明 ,克无踪农药对土壤动物有明显影响 ,并随着克无踪溶液处理浓度的增加 ,土壤动物的种类和数量显著减少 ,但上、下层动物随染毒历时递减规律有所不同。染毒实验中土壤动物种类的减少主要由于常见类群和稀有类群的减少 ,土壤动物的数量变化则主要由于优势类群弹尾类和蜱螨类的数量消长所致。

Paraquat polluted experiment on the agricultural soil animal be taken in this project. 1 291 soil animal ind. belonging to 3 Phylums and 7 Classes were collected. The result indicated that: with the increasing of Paraquat concentration, the species and quantities of soil animals decreased remarkably. But with the time of treating prolonged, there was little difference between topsoil animal and subsoil animal in decreasing trend. In this polluted experiment, the species of soil animals were decreased with decreasing of common population and rare population, while the amount change of soil animal was associated with the amount change of the dominant populations of Collembola and Acarina.