新疆农业科学 ›› 2023, Vol. 60 ›› Issue (3): 706-714.DOI: 10.6048/j.issn.1001-4330.2023.03.022

• 植物保护·设施农业·农产品加工工程·微生物 • 上一篇    下一篇

基于QuEChERS-GC/MS法对土壤和甜菜中精异丙甲草胺的残留降解动态测定

程文亮(), 宋文钰, 王浩东, 许同心, 吴彩兰, 王春娟(), 杨德松()   

  1. 石河子大学农学院/新疆绿洲农业病虫害治理与植保资源利用重点实验室,新疆石河子 832000
  • 收稿日期:2022-09-03 出版日期:2023-03-20 发布日期:2023-04-18
  • 通信作者: 王春娟(1979-),女,讲师,博士,研究方向为生物农药,(E-mail)wchunjuan@126.com;
    杨德松(1977-),男,安徽滁州人,教授,博士,硕士生导师,研究方向为农药环境毒理学,(E-mail)yds_agr@shzu.edu.cn
  • 作者简介:程文亮(1997-),男,河南周口人,硕士研究生,研究方向为农药毒理学,(E-mail)1426088390@qq.com
  • 基金资助:
    新疆生产建设兵团重大科技计划“机采棉田杂草高效防除技术研发与集成应用”(2018AA006)

Determination of Residual Degradation of S-Metolachor Residue in Soil and Sugar Beet by QuEChERS-GC/MS

CHENG Wenliang(), SONG Wenyu, WANG Haodong, XU Tongxin, WU Cailan, WANG Chunjuan(), YANG Desong()   

  1. Key Laboratory for Oasis Agricultural Pest Management and Plant Protection Resource Utilization / College of Agronomy, Shihezi University, Shihezi Xinjiang 832003,China
  • Received:2022-09-03 Online:2023-03-20 Published:2023-04-18
  • Correspondence author: WANG Chunjuan(1979-), Female, Ph.D., lecturer, Research field: biological pesticide research,(E-mail)wchunjuan@126.com;
    YANG Desong(1977-), Male, Ph.D., Professor, Master instutor, Research field: pesticide toxicology research, (E-mail)yds_agr@shzu.edu.cn
  • Supported by:
    Major Scientific R & D Program Project of XPCC "Research and Development and Integrated Application of Efficient Weed Control Technology in Machine-picked Cotton Field"(2018AA006)

摘要:

【目的】研究精异丙甲草胺在甜菜及种植土壤中的残留降解动态。【方法】采用QuEChERS-GC/MS法,分析不同深度土壤和甜菜中施用的不同浓度的精异丙甲草胺。【结果】精异丙甲草胺在0.01~1.0 mg/L浓度范围内呈良好线性,相关系数为0.999 4,所建立的最小检出限为0.001 mg/kg;平均回收率在84.81%~110.45%,相对标准偏差(RSD,n=3)在1.36%~9.0%。1 296、1 944、3 888 g.a.i/hm2的精异丙甲草胺在0~5、5~10、10~15 cm的土壤以及甜菜中的降解遵循一级动力学方程,不同深度土壤中的残留量随浓度的增加而增加,随时间的延长而降低,不同施用浓度在不同深度土壤中的半衰期为9.12~17.77 d。施用浓度越高,降解速度越慢。在甜菜中的残留量和降解速率都低于土壤,半衰期较土壤中略高,3个浓度在甜菜中的半衰期分别为19.25、26.65和32.85 d。【结论】施用1 296和1 944 g.a.i/hm2的精异丙甲草胺,收获期在土壤和甜菜中的降解率均能达到90%;施用超剂量3 888 g.a.i/hm2的精异丙甲草胺在收获期的降解率会低于80%,精异丙甲草胺在土壤和甜菜中较易降解,属于易降解农药。

关键词: 精异丙甲草胺; 土壤; 甜菜; QuEChERS-GC/MS; 降解动态

Abstract:

【Objective】 This project aims to clarify the residual degradation dynamics of metolachlor in sugar beet and planting soil.【Method】 QuEChERS-GC/MS method was used to study the effects of different concentrations of S-Metolachor in different soil depths and sugarbeet.【Results】 The results showed that the S-Metolachorresidue was linear in the concentration range of 0.01-1.0 mg/L with a correlation coefficient of 0.999 4.The minimum detection limit was 0.001 mg/kg; the average recovery was 84.81-110.45%, relative standard deviation (RSD, n=3) was between 1.36% and 9.0%.The degradation of S-Metolachorresidue in 0-5, 5-10, 10-15 cm soil and sugar beet in 1,296, 1,944, 3,888 g.a.i/hm2, following the first-order kinetic equation.The residue in different depth soil increased with the increase of concentration, and decreased with the extension of time.The half-life of different application concentration in different depth soil was 9.12-17.77 d.The higher the application concentration, the slower the degradation rate.The residual amount and degradation rate in sugar beet were lower than that in soil, and the half-life was slightly higher than that in soil.The half-lives of three concentrations in sugar beet were 19.25 d, 26.65 d and 32.85 d, respectively.【Conclusion】 The degradation rate of S-Metolachlor in soil and sugar beet can reach 90% when 1,296 g.a.i/hm2 and 1,944 g.a.i/hm2 are applied, and is lower than 80% when the dosage of S-Metolachlor is 3,888 g.a.i/hm2.From the perspective of degradation rate, S-Metolachlor is easy to degrade in soil and sugar beet, which belongs a kind of degradable pesticide.

Key words: S-Metolachor; soil; sugar beet; QuEChERS-GC/MS; degradation dynamics

中图分类号: 


ISSN 1001-4330 CN 65-1097/S
邮发代号:58-18
国外代号:BM3342
主管:新疆农业科学院
主办:新疆农业科学院 新疆农业大学 新疆农学会

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