2种不同剂型阿维菌素在土壤和田水中的消解动态

Degradation of two different formulations of Abamectin in paddy soil and paddy water

研究了施用乳油和微乳剂2种不同剂型的阿维菌素在土壤和田水中的消解动态。结果表明:(1)阿维菌素残留检测方法在添加浓度为0.001～1.000 mg.kg-1时,平均回收率为86.1%～105.2%,变异系数为4.3%～8.2%,符合残留检测标准;(2)推荐剂量下施药,微乳剂在试验三地的半衰期分别为土壤2.6～2.7d,田水2.7～4.5 d;乳油在试验三地的半衰期分别为土壤11.2～13.1 d,田水3.6～7.4 d。同一施药条件下,乳油的半衰期均大于微乳剂的半衰期。

The degradation dynamics of different formulations of Abamectin in paddy soil and paddy water were studied.When the additive concentration was in the extent of 0.001-1 mg·kg-1,the average recovery varied from 87.3% to 98.4% with the coefficient of variation of 4.3%-8.2%,which was accord with the relevant standard of pesticide residue test.Experimental data suggested that with the recommended dose,the half-time of EC of Abamectin was 2.6-2.7 d in soil,2.7-4.5 d in paddy water at three testing places,and ME was 11.2-13.1 d in soil,3.6-7.4 d in paddy water at three testing places.The results showed that the half-time of EC of Abamectin was longer than the half-time of ME in the same testing condition.