异恶草酮与镉对蝌蚪的联合毒性研究

JOINT-TOXICITY OF CLOMAZONE AND CADMIUM ON RANA LIMNOCHARIS

研究了异恶草酮与镉共存时对蝌蚪的联合毒性。在常温20℃下,异恶草酮对蝌蚪的24h、48h、72h、96h LC50分别为15.62mg/L、14.27 mg/L、13.35 mg/L、13.30 mg/L;镉对蝌蚪的24h、48h、72h、96h LC50分别为5.63mg/L、3.54 mg/L、2.61 mg/L、2.06 mg/L;异恶草酮与镉共存对蝌蚪联合毒性的24h、48h、72h、96h的相加指数AI分别为0.25、0.21、0.19、0.14,均大于0,表现为协同作用。另随着处理温度的升高,异恶草酮对蝌蚪的毒性减弱,而镉对蝌蚪的毒性增强,两者的联合毒性仍表现为协同作用。

Joint—toxicity of Clomazone and Cadmium on Rana limnocharis was studied in the present investigation.It was demonstrated that LC_(50) of Clomazone on Rana limnocharis were 15.62mg/L、14.27 mg/L、13.35 mg/L、13.30 mg/L,while that of Cadmium were 5.63mg/L、3.54 mg/L、2.61 mg/L、2.06 mg/L,respectively.According to the addictive index method of Marking,it has been found that the addictive index(AI)were 0.25、0.21、0.19 and 0.14 in 24 h,48 h 72h and 96 h respectively,revealing that there is a clear synergism action.And with the temperature's increase,the toxicity of Clomazone on Rana limnocharis was weakened,while that of Cadmium on Rana limnocharis was strengthened, and the joint—toxicity of the two was still a synergism action.