Cu^2+、Pb^2+与2种除草剂单一及复合污染对蚯蚓的急性毒性  

Acute Toxicity of Single and Compound Pollution of Cu2+,Pb2+and Two Herbicides to Earthworm

作　　者：王冰洁 姜蕾[1] 潘波[1] 林勇[1] WANG Bing-jie;JIANG Lei;PAN Bo;LIN Yong(Key Laboratory of Integrated Pest Management of Tropical Crops,Ministry of Agriculture and Rural Affairs,Environment and Plant Protection Institute,Chinese Academy of Tropical Agricultural Sciences,Haikou 571101,China)

机构地区：[1]中国热带农业科学院环境与植物保护研究所农业农村部热带作物病虫害综合治理重点实验室,海口5771101

出　　处：《农药》2020年第6期425-429,454,共6页Agrochemicals

基　　金：海南省重点研发计划项目(ZDYF2018056);中国热带农业科学院基本科研业务费专项资金(1630042017018)。

摘　　要：[目的]旨在探讨Cu^2+、Pb^2+与2种除草剂单一及复合污染对蚯蚓的急性毒性。[方法]以赤子爱胜蚓为材料,采用滤纸法测定不同浓度Cu^2+、Pb^2+与草甘膦、草铵膦单一及复合污染对蚯蚓的急性毒性。[结果]单一污染试验结果显示:Cu^2+、Pb^2+、草甘膦和草铵膦对蚯蚓急性毒性48 h-LC50分别为1.287、16.344、118.311、238.713μg/cm^2。Cu^2+和Pb^2+对蚯蚓的毒性比草甘膦和草铵膦更大,草甘膦和草铵膦对赤子爱胜蚓表现为低毒。复合污染试验结果显示,在低浓度草甘膦、草铵膦胁迫下,草甘膦、草铵膦可以降低Cu^2+、Pb^2+对蚯蚓的毒性;在高浓度草甘膦、草铵膦胁迫下,添加Cu^2+、Pb^2+可以降低草甘膦、草铵膦对蚯蚓的毒性。[结论]Cu^2+、Pb^2+与草甘膦、草铵膦复合后对蚯蚓的毒性降低是由于拮抗作用。[Aims]This study aims to reveal the effect of acute toxicity of single and compound pollution of Cu^2+,Pb^2+,and glyphosate,glufosinate-ammonium to earthworms(Eisenia fetida).[Methods]The single and joint acute toxicity of Cu^2+,Pb^2+,glyphosate and glufosinate-ammonium to earthworms was determined by filter paper method.[Results]The results of single pollution experiment showed that the 48 h-LC50 of Cu^2+,Pb^2+,glyphosate and glufosinate-ammonium to earthworms were 1.287,16.344,118.311 and 238.713μg/cm^2,respectively.The toxicity of Cu^2+and Pb^2+to earthworms is higher than those of glyphosate and glufosinate-ammonium,indicating that the acute toxicity of glyphosate and glufosinate-ammonium was low to earthworms.The results of compound pollution experiment showed that under the stress of low concentration of glyphosate and glufosinate-ammonium,glyphosate and glufosinate-ammonium could reduce the toxicity of Cu^2+and Pb^2+.Under the stress of high concentration of glyphosate and glufosinate-ammonium,the added Cu^2+and Pb^2+could decrease the toxicity of glyphosate and glufosinate-ammonium,to earthworms.[Conclusions]The toxicity decrease of Cu^2+,Pb^2+combined with glyphosate and glufosinate-ammonium is ascribed to antagonism.

关 键 词：CU^2+ PB^2+ 草甘膦 草铵膦 蚯蚓 急性毒性 

分 类 号：TQ450.2[化学工程—农药化工]