农业环境科学学报2011，Vol.30Issue(5)：855-859,5.
5种杀虫剂在水-人工底泥系统中对大型溞的急性毒性及其比较
Acute Toxicity of Five Insecticides to Daphnia magna in Water-sediment System
摘要
Abstract
A water-sediment system consisting of culture medium of M4 and artificial soil was established in this study.Acute toxicity of five insecticides, i.e.chlorpyrifos, fipronil, fenvalerate, cyfluthrin, and bifenthrin, towards water flea, Daphnia magna, was tested with this system.The insecticides were added by spiking stock solution of the standard or the technical materials into the water columns and the daphnia were introduced thereafter.Result of the study showed that 48 h-LC50 values for the five insecticides were determined to be 9.01, 88.1, 0.142,0.097 6 a.i.μg· L-1, and 0.050 4 a.i.μg· L-1 The corresponding values of 48 h-LC50 derived from sediment-free systems were determined to be 3.31,238, 0.459, 0.050 7 a.i.μg·L-1 and 0.030 4 a.i.μg·L-1.To compare the LC50 values from the two systems, we could see that toxicity of chlorpyriflos, cyfluthrin, and bifenthrin enhanced in water-sediment system, whereas the toxicity of fipronil and fenvalerate declined.It seems that pattern of change of LC50 did not accord well with fluctuation of lg Kow values among the insecticides involved.This study revealed that it was difficulty to predict toxicity declination for pesticides being applied in water-sediment system merely by hydrophobic nature because the declinations were determined by multi factors.关键词
毒死蜱/氰戊菊酯/氟氯氰菊酯/联苯菊酯/氟虫腈/大型溞/人工底泥/急性毒性/KowKey words
chlorpyrifos/ fipronil/ fenvalerate/ cyfluthrin/ bifenthrin/ Daphnia magna/ artifical sediment/ acute toxicity/ Kow分类
资源环境引用本文复制引用
徐燕,边文杰,李少南,朱国念..5种杀虫剂在水-人工底泥系统中对大型溞的急性毒性及其比较[J].农业环境科学学报,2011,30(5):855-859,5.基金项目
浙江省教育厅科研项目(20070138) （20070138）
