论文部分内容阅读
应用敌百虫杀虫剂对南方农田土壤动物进行染毒模拟实验,共获得土壤动物679只,隶属1门20目1亚目,其中前气门亚目(Prostigmata)和弹尾目(Collembola)为优势类群,共占土壤动物全捕获量的54.93%,其余为常见类群和稀有类群。实验结果表明,随敌百虫处理浓度的增加,土壤动物的个体数量和类群数减少,Shannon-Wiener多样性指数(H’)和Pielou均匀度指数(E)均表现出递减趋势,而Simpson优势度指数(C)则递增。在一定的染毒历时(24~72 h)内,随着染毒时间的增加,所获得的土壤动物的类群数和个体数量呈下降趋势。
Applying trichlorfon pesticide to simulate soil animal activities in southern farmland, 679 soil animal species were obtained, belonging to a 20-order, 1-order subfamily, of which Prostigmata and Collembola were predominant Which accounted for 54.93% of the total catch of soil animals, with the rest being common and rare. The experimental results showed that Shannon-Wiener diversity index (H ’) and Pielou evenness index (E) showed a decreasing trend with the increase of trichlorfon concentration and the number of individuals and taxa of soil animals decreased, while Simpson’s advantage The degree index (C) is incremented. Within a certain period of exposure (24 ~ 72 h), the number of taxa and individuals of soil fauna decreased with the increase of exposure time.