苯醚甲环唑在水稻和稻田中的残留  

Difenoconazole Residues in Rice and Paddy System

作　　者：张志勇 王冬兰 张存政 吴长付 刘贤进 

机构地区：[1]江苏省食品质量安全重点实验室/农业部食品安全监控重点开放实验室,江苏南京210014

出　　处：《中国水稻科学》2011年第3期339-342,共4页Chinese Journal of Rice Science

基　　金：国家科技支撑计划资助项目(2006BAD08A03);江苏省自主创新资金资助项目[CX(09)630]

摘　　要：为明确苯醚甲环唑在稻田系统的使用安全性,调查了我国3个不同水稻种植区域(湖南长沙、吉林长春和浙江杭州)苯醚甲环唑在稻田系统中的残留消解动态以及在糙米、稻壳、水稻茎秆和土壤中的最终残留量。按高剂量(112.5g/hm2)施药1次后,苯醚甲环唑在不同种植区域水稻植株、稻田水和土壤中的半衰期分别为6.1～8.9d,5.3～6.2d和3.8～4.1d。各试验点最终残留结果表明,施药后28d采样时糙米中苯醚甲环唑的最终残留量均<0.01mg/kg,水稻茎秆中含量最高,土壤中均未检出苯醚甲环唑(<0.01mg/kg)。结合生产实际,按该试验设计的施药剂量、施药次数和采收间隔期,糙米、水稻茎秆和稻壳中苯醚甲环唑的残留量是安全的,但若是稻渔共作种植方式,则应尽量避免该农药的使用,以免对鱼类造成不利影响。To determine the safety of difenoconazole in rice and paddy system,residual dynamics in rice plant,paddy water and soil,final residual levels in brown rice,rice husk,rice stem,and paddy soil were investigated in three typical rice planting areas Changsha,Changchun and Hangzhou in China.The half-lives of difenoconazole at higher dosage（112.5 g/hm2,spraying for one time） in rice plant,paddy water,and paddy soil were 6.1-8.9 d,5.3-6.2 d and 3.8-4.1 d,respectively in different rice planting area.Residual levels of difenoconazole in brown rice were below the limit of detection 28 d after treatment（0.01 mg/kg） in all treatments.However,the residual levels of difenoconazole in rice culm were higher than those in brown rice and rice husk,and the final residual levels of difenoconazole in paddy soil were below the limit of detection（0.01 mg/kg） in all treatments.Based on the actual production,difenoconazole residues in brown rice,rice culm and rice husk were safe according to the recommended dosage,times and interval.In spite of that,the use of difenoconazole should be avoided in rice-fish culture model,so as to prevent side effects on aquatic organisms such as fish.

关 键 词：苯醚甲环唑 残留 水稻 稻田系统 

分 类 号：S481.8[农业科学—农药学] S511.03[农业科学—植物保护]