铜和阿特拉津对瓯江彩鲤的联合毒性研究

Joint Toxicity of Cu^(2+) and Atrazine on C.carpio var.color

以瓯江彩鲤为试验材料,采用联合指数相加法,研究了铜和阿特拉津对瓯江彩鲤的急性毒性和联合毒性效应.实验结果表明:Cu2+的毒性大于阿特拉津毒性;Cu2+对瓯江彩鲤24、48、72和96 h的LC50分别为0.74、0.40、0.34和0.29 mg.L-1,阿特拉津对瓯江彩鲤24、48、72和96 h的LC50分别为68.16、52.14、48.33和42.37 mg.L-1.联合毒性实验结果表明,24、48、72、96 h的相加指数分别为2.17、1.35、1.59、2.08,Cu2+和阿特拉津共存时对瓯江彩鲤的毒性为协同作用.

The paper has researched on the acute and joint toxic effects of Cu2＋and atrazine on C.carpio var.color by the additive index method.The results have showed that the acute toxic effect of Cu2＋ is higher than that of atrazine.The 24,48,72 and 96 h median lethal levers of copper are 0.74,0.40,0.34 and 0.29 mg·L-1 respectively.The 24,48,72 and 96 h median lethal levers of atrazine are 68.16,52.14,48.33,42.37 mg·L-1.The 24,48,72 and 96 h additive indexes estimated from the joint toxicity test datas are 2.17,1.35,1.59 and 2.08 respectively.These results have demonstrated that Cu2＋and atrazine have joint toxic effects on C.carpio var.color when they coexist.