丙溴磷在柑桔和土壤中的残留研究  

Residue Dynamics of Profenofo in Orange and Soil

作　　者：王思威[1] 孙海滨[1] 曾繁娟[1] 刘明津[1] 刘艳萍[1] 

机构地区：[1]广东省农业科学院植物保护研究所/广东省植物保护新技术重点试验室,广州510640

出　　处：《农学学报》2013年第1期26-31,共6页Journal of Agriculture

基　　金：广东省科技厅农业攻关项目(2008B020900003);广东省科技厅促进科技服务业发展专项计划(2010A04031011);农业部农药检定所农药残留登记试验项目(2010P269)

摘　　要：采用田间小区试验研究了50%丙溴磷·炔螨特乳油在柑桔和土壤中的残留消解趋势。样品采用甲醇提取,石油醚液液分配萃取,弗罗里硅土柱层析净化,气相色谱电子捕获检测器测定了丙溴磷在柑桔和土壤中的残留量。结果表明:丙溴磷在柑桔和土壤中半衰期分别为4.3～7.2天、5.5～8.1天。施药剂量333mg/kg,施药2次,药后21天,柑桔全果中丙溴磷最终残留量<0.01～0.04mg/kg,柑桔果肉中丙溴磷的最终残留量均<0.01mg/kg,均低于中国规定的丙溴磷在柑桔上的最大残留限量值0.2mg/kg,果皮中的残留量为0.03～0.30mg/kg,可知,施用后的丙溴磷大部分残留于柑桔果皮中。按照推荐施药剂量333mg/kg,施药次数不超过2次,安全间隔期为21天,不会对柑桔和土壤造成残留污染。Field trial and gas chromatography were carried out to study residual decline and final residues of profenofos in the orange and soil. The GAP of profenofos in application was discussed. The half-lives of profenofos were 4.3-7.2 d and 5.5-8.1 d in orange and soil. The decline rules of profenofos in orange and soil followed the first order chemical reactions dynamics equation. The orange was sprayed two times with 50% EC according to the recommended dosage 333 mg/kg, the results revealed that the profenofos terminal residues in the whole orange was 0.01-0.04 mg/kg at the 21 d after the last application, the residue in the flesh was all below 0.01 mg/kg. The residues were all below the MRL in China （0.2 mg/kg）. It recommended that the pre-harvest interval of profenofos in orange set at 21 d, the maximum application times was safe for orange below 2 times spraying by applying 333 mg/kg of 50 % profenofos·propargite EC.

关 键 词：丙溴磷 柑桔 残留 气相色谱 

分 类 号：S3[农业科学—农艺学]