利谷隆对穗状狐尾藻的毒性影响  

The Toxic Effects of Linuron on Myriophyllum spicatum

作　　者：陈诗卉 王艮梅 王宏伟 姜锦林 单正军 续卫利 CHEN Shi-hui;WANG Gen-mei;WANG Hong-wei;JIANG Jin-lin;SHAN Zheng-jun;XU Wei-li(Key Laboratory of Pesticide Environmental Assessment and Pollution Control,Nanjing Institute of Environmental Sciences,Ministry of Ecology and Environment,Nanjing 210042,China;Centre of Co-Innovation for Sustainable Forestry in Southern China,Nanjing Forestry University,Nanjing 210037,China)

机构地区：[1]生态环境部南京环境科学研究所,国家环境保护农药环境评价与污染控制重点实验室,南京210042 [2]南京林业大学林学院现代南方林业协同创新中心,南京210037

出　　处：《农药》2020年第5期352-356,共5页Agrochemicals

基　　金：水体污染控制与治理科技重大专项(2017ZX07602-002)。

摘　　要：[目的]通过科学评价利谷隆对穗状狐尾藻的毒性效应,为该农药的生态环境风险评估提供基础数据。[方法]试验采用半静态法,将穗状狐尾藻暴露14 d,观察其生长状态,确定利谷隆在水沉积物系统中对穗状狐尾藻营养生长的影响。[结果]利谷隆对穗状狐尾藻茎长、根长、整株长度、鲜重及干重的14 d平均比生长率抑制半效应浓度(14 d-ErC50)分别为0.278、0.331、0.225、0.390、0.318 mg/L,平均生物量增长量抑制半效应浓度(14 d-EyC50)分别为0.173、0.259、0.164、0.247、0.222 mg/L。[结论]利谷隆对穗状狐尾藻茎长、根长、整株长度、鲜重及干重的生长影响在低质量浓度(0.03 mg/L)时表现出刺激作用;高质量浓度(2.43 mg/L)时对茎长、根长、整株长度、鲜重及干重的抑制呈现良好的剂量-效应关系,即随着利谷隆溶液浓度增加,抑制作用呈上升趋势。[Aims]This study aims to scientifically evaluate the toxicity effect of Linuron on Myriophyllum spicatum to provide basic data for ecological environmental risk assessment.[Methods]According to semi-static method,M.spicatum was exposed for 14 days and the growth state was observed to determine the effect of linuron on the vegetative growth of M.spicatum in water sediment.[Results]As shown in the results,the 14 d-ErC50 values of Linuron on stem length,root length,total length,fresh weight and dry weight are 0.278,0.331,0.225,0.390 and 0.318 mg/L and the 14 d-EyC50 values are 0.173,0.259,0.164,0.247 and 0.222 mg/L respectively.[Conclusions]Linuron has stimulating effect on stem length,root length,total length,fresh weight at low concentration(0.03 mg/L)while reliable dose-effect relationship was observed at high concentration(2.43 mg/L).And the inhibitory effect becomes stronger with the increase of concentration of linuron.

关 键 词：利谷隆 穗状狐尾藻 生长 毒性 

分 类 号：TQ450.2[化学工程—农药化工]