【摘要】 采用人工土培养法,通过急性和亚急性暴露实验,研究了DDT和三氯杀螨醇对蚯蚓(赤子爱胜蚓)的存活、生长和繁殖能力的影响.结果表明,DDT在急性暴露期对蚯蚓存活具有一定的毒性,其14d的LC50为484.76mg·kg-1;三氯杀螨醇对蚯蚓的存活基本没有影响(LC50>4000mg·kg-1).DDT在急性和亚急性暴露期(10~28d)对蚯蚓的生长都具有显著的抑制作用(p<0.05),三氯杀螨醇在急性期对蚯蚓的生长没有抑制作用(p>0.05),在亚急性期对蚯蚓生长的影响尚不确定.DDT和三氯杀螨醇都显著抑制蚯蚓的繁殖能力(p<0.05).更多还原

【Abstract】 The artificial soil method was adopted to compare the toxicological effects of DDT and dicofol on earthworms after both acute and subtle exposure. The results showed that DDT had a lethal effect on earthworms, with LC_ 50 (14 d) =484.76 mg·kg~ -1 , while dicofol had no obvious lethal effect on earthworms with LC_ 50 >4000 mg·kg~ -1 . DDT significantly inhibited the growth of earthworms after both acute and subtle exposure (p<0.05). Dicofol had no inhibition to the growth of earthworms in acute test (p>0.05), and uncertain inhibition to the growth in the subtle test. Both DDT and dicofol significantly inhibited the reproduction ability of earthworms (p<0.05). The research results provided a good indication for assessing soil pollutions of both DDT and dicofol and eco-toxicity of pesticides.更多还原