速灭威在宁夏枸杞和土壤中的残留及消解动态研究  

Study on Residue and Degradation of Tsumacide in Lycium barbarum and Soil

作　　者：郝凤霞[1] 田梅 房俊卓[1] 齐之锴[1] 杨金会[1] Hao Fengxia;Tian Mei;Fang Junzhuo;Qi Zhikai;Yang Jinhui(State Key Laboratory of High-efficiency Utilization of Coal&Green Chemical Engineering,Ningxia University,Yinchuan 750021,China)

机构地区：[1]宁夏大学省部共建煤炭高效利用与绿色化工国家重点实验室,银川750021

出　　处：《生态毒理学报》2020年第4期318-322,共5页Asian Journal of Ecotoxicology

基　　金：国家自然科学基金资助项目(21567022)。

摘　　要：速灭威是枸杞中常用的一种氨基甲酸酯类农药,在防治枸杞蚜虫的同时,残留在枸杞和土壤中的农药又会对生态环境造成危害。通过田间试验,研究了速灭威在枸杞和土壤中的残留与消解动态。结果表明,速灭威在枸杞和土壤中的半衰期分别为3.38 d和5.29 d。将25%速灭威可湿性粉剂以750 g·hm^-2和1500 g·hm^-2剂量在枸杞上施药,喷施药2~3次,施药间隔期7 d,距最后一次施药21 d,速灭威在枸杞和土壤中的最大残留量分别为0.0485 mg·kg^-1和0.1596 mg·kg^-1。建议速灭威在枸杞上的最大允许残留限量为0.05 mg·kg^-1,施药安全间隔期为21 d。Tsumacide is a commom carbamate pesticide for controlling Aphis sp.,but meantime,pesticide residues in Lycium barbarum and soil will cause harm to ecological environment.Field experiments were conducted to stud-y the residues and degradation of tsumacide in Lycium barbarum and soil in Ningxia.As a result,the half life of tsumacide in Lycium barbarum and soil was 3.38 d and 5.29 d respectively.When spaying 2~3 times with the rec-ommended dosages of 750 g·hm^-2 and 1500 g·hm^-2,the final maximum residue levels(MRL)of tsumacide in Lycium barbarum and soil were 0.0485 mg·kg^-1 and 0.1596 mg·kg^-1 at 21 d after the last application,respectively.It is suggested that the maximum permissible residue limit of tsumacide in Lycium barbarum is 0.05 mg·kg^-1,and the safe interval period is 21 d.

关 键 词：速灭威 枸杞 土壤 消解动态 最终残留 

分 类 号：X171.5[环境科学与工程—环境科学]