赤子爱胜蚓对不同盐分含量土壤的耐受性研究  

Salt Tolerance of Eisenia fetida in Soil

作　　者：伍玉鹏[1] 张宁[1] 孙振钧[1] 

机构地区：[1]中国农业大学资源与环境学院,北京100193

出　　处：《湖北农业科学》2012年第17期3722-3725,共4页Hubei Agricultural Sciences

基　　金：中央高校基本科研业务费专项资金

摘　　要：采用急性毒性试验和回避试验研究了赤子爱胜蚓(Eisenia fetida)对不同盐分含量土壤的耐受性。急性毒性试验显示,滤纸接触法下NaCl盐溶液对蚯蚓的48 h LC50为1.12%(质量分数);土壤法测得人工盐碱土壤和自然盐碱土壤电导率分别为2.23、2.62 mS/cm时,蚯蚓14 d后的死亡率为50%;回避试验表明,人工盐碱土壤电导率为1.67 mS/cm,自然盐碱土壤电导率为2.43 mS/cm时,蚯蚓具有回避反应。The salt-tolerance of Eisenia fetida was determined by acute toxicity test and avoidance test.The results showed that the LC50 of NaCl solution for E.fetida was 1.12%（mass ratio） according to the contact filter paper test.When the electric conductivity of artificial and natural saline soil was 2.23 mS/cm and 2.62 mS/cm,respectively,the death rate of earthworm was 50% after 14 d.Earthworm showed avoidance behavior when electric conductivity of artificial saline soil and natural saline soil was 1.67,2.43 mS/cm respectively.

关 键 词：赤子爱胜蚓(Eisenia fetida) 耐盐性 急性毒性 回避反应 

分 类 号：S156.4[农业科学—土壤学]