异恶草酮对三叶浮萍的毒性研究  

Toxicity Effects of Clomazone on Lemna minor

作　　者：何文[1] 郭正元[1] 贺仲兵[1] 

机构地区：[1]湖南农业大学环境科学系,长沙410128

出　　处：《贵州农业科学》2006年第1期71-73,共3页Guizhou Agricultural Sciences

摘　　要：以三叶浮萍为对象,研究了异恶草酮对其生长及体内色素的影响作用。结果表明:异恶草酮对浮萍生长抑制的24 hIC50为8.86 mg/L4、8 h IC50为5.21 mg/L7、2 h IC50为1.92 mg/L、96 h IC50为1.66 mg/L,对浮萍体内叶色素的影响作用呈良好的浓度(剂量)-效应关系,随着处理浓度的增大,浮萍体内的叶绿素和胡萝卜素含量明显减少,且叶绿素a/b值也随处理浓度的增大而减小。The experiment was conducted to investigate effects of clomazone on the growth of Lemna minor and its pigment. The results indicated that the ICs0of 24h, 48h, 72h and 96h clomazone treatments were 8. 86mg/L, 5. 21mg/L, 1.92mg/L and 1.66mg/L respectively. The contents of chlorophyll and carotene in Lemna minor obviously decreased with the clomazone increase and the value of chlorophyll a/b decreased with the clomazone increase.

关 键 词：异量草酮 三叶浮萍 毒性 

分 类 号：S482.4[农业科学—农药学] S451[农业科学—植物保护]