菌核净在生菜和土壤中的残留动态  

Residual Dynamics of Dimethachlone in Lettuce and Soil

作　　者：蒋丽君[1,2] 陆贻通[1] 

机构地区：[1]上海交通大学农业与生物学院,农业部都市农业(南方)重点实验室,上海200240 [2]上海市松江区食用农产品安全监督检测中心,上海201611

出　　处：《上海交通大学学报（农业科学版）》2012年第4期47-51,共5页Journal of Shanghai Jiaotong University(Agricultural Science)

基　　金：上海市科技兴农推广项目[沪农科推字(2010)第4-5号];农业部公益性行业(农业)科研专项(200903056)

摘　　要：建立了菌核净残留的气相色谱分析法,并采用该方法测定了菌核净在生菜和土壤中的残留量。结果显示,菌核净在生菜、土壤中的最小检出浓度为0.002 mg/kg,平均添加回收率为96.0%～101.0%,变异系数为1.3%～2.8%。残留动态研究表明,菌核净在生菜、土壤中半衰期为6.2、11.4d。40%(质量分数)菌核净可湿性粉剂在生菜定植初期以低剂量(600g/hm2)和高剂量(1 200g/hm2)施药3～4次,距最后一次施药21d后菌核净的残留量小于0.70mg/kg。The gas chromatography method for determining dimethachlone was developed and the residual concentration of dimethachlone in lettuce and soil was detected.The results indicated that the minimum detectable concentration of dimethachlone by the method was 0.002 mg/kg in lettuce and soil,the average recovery rate of dimethachlone in lettuce and soil samples ranged from 96.0% to 101.0% with the relative standard deviation ranged from 1.3% to 2.8%.The half-life of dimethachlone in lettuce and soil was 6.2 d and 11.4 d,respectively.The 40% dimethachlone WP were applied with the dosage of 600 and 1 200 g/hm2 for 3 or 4 times in stage of lettuce initial transplantation,after 21 days application,the residue of dimethachlone in lettuce and soil was less than 0.70 mg/kg.

关 键 词：菌核净 生菜 土壤 残留动态 

分 类 号：S481.8[农业科学—农药学]