生态环境学报 ›› 2021, Vol. 30 ›› Issue (6): 1269-1275.DOI: 10.16258/j.cnki.1674-5906.2021.06.018

• 研究论文 • 上一篇    下一篇

17种常用除草剂对蚯蚓的急性毒性

李涛1(), 孟丹丹2, 郭水良2, 袁国徽1, 钱振官1, 吕卫光1,*()   

  1. 1.上海市农业科学院,上海 201403
    2.上海师范大学生命与环境科学学院,上海 200234
  • 收稿日期:2020-12-26 出版日期:2021-06-18 发布日期:2021-09-10
  • 通讯作者: * 吕卫光(1972年生),男,研究员,博士,主要从事生态农业研究。E-mail: lwei1217@sina.com
  • 作者简介:李涛(1982年生),男,副研究员,硕士,主要从事杂草综合治理技术研究。E-mail: litao@saas.sh.cn
  • 基金资助:
    上海市科技兴农推广项目(沪农科推字(2018)第4—14号);国家重点研发计划(2018YFD0200500);上海市农业科学院卓越团队建设计划[2017(A-03)

Acute Toxicity of Seventeen Herbicides Commonly Used to Earthworm (Eisenia fetida)

LI Tao1(), MENG Dandan2, GUO Shuiliang2, YUAN Guohui1, QIAN Zhenguan1, LV Weiguang1,*()   

  1. 1. Shanghai Academy of Agricultural Sciences, Shanghai 201403, China
    2. College of Life and Environmental Sciences, Shanghai Normal University, Shanghai 200234, China
  • Received:2020-12-26 Online:2021-06-18 Published:2021-09-10

摘要:

蚯蚓在改良土壤、消解农业废弃物、提高土壤养分和作物产量方面发挥着重要的作用。为了评价除草剂对蚯蚓的毒性,采用滤纸接触法和人工土壤法测定了17种除草剂对赤子爱胜蚓(Eisenia fetida)的急性毒性。滤纸接触法染毒48 h,噁唑酰草胺对赤子爱胜蚓的毒性最高,半数致死浓度LC50(median lethal concentration)为7.6 μg∙cm-2,属高毒级;其次为丙草胺、高效氟吡甲禾灵和灭草松,LC50分别为10.7、12.7、61.3 μg∙cm-2,属中毒级;二氯喹啉酸、2甲4氯钠、苯唑草酮、草铵膦、烟嘧磺隆和双草醚对赤子爱胜蚓的LC50分别为143.0、198.2、211.1、466.9、433.7、649.2 μg∙cm-2,属低毒级;吡嘧磺隆、五氟磺草胺、嘧啶肟草醚、氰氟草酯、乙羧氟草醚、二甲戊灵和硝磺草酮对赤子爱胜蚓的LC50均大于1000 μg∙cm-2,属微毒级。人工土壤法染毒14 d,高效氟吡甲禾灵对赤子爱胜蚓的毒性最高,LC50为148.9 mg∙kg-1;其次为丙草胺、2甲4氯钠、二甲戊灵和噁唑酰草胺,LC50分别为211.5、335.0、342.4、345.7 mg∙kg-1;此外,其他供试除草剂对赤子爱胜蚓的LC50均大于500 mg∙kg-1。根据《化学农药环境安全评价试验准则》中的分级标准,采用人工土壤法测定的17种除草剂对赤子爱胜蚓的毒性均为低毒级。该研究可为评估除草剂对蚯蚓的生态风险提供新的数据信息,同时可为农业生产中安全使用除草剂提供技术指导。

关键词: 蚯蚓, 除草剂, 急性毒性, 赤子爱胜蚓, 生态环境

Abstract:

Earthworms are known to play an important role in improving soil, decomposing agricultural litter, and enhancing soil fertility and crop yield. The acute toxicity of 17 herbicides to Eisenia fetida was determined by a contact filter paper toxicity bioassay and an artificial soil toxicity bioassay. Results of 48 h by the contact filter paper toxicity bioassay, metamifop was high toxicity to E. fetida with LC50 (median lethal concentration) value of 7.6 μg∙cm-2; pretilachlor, haloxyfop-R-methyl, and bentazone were moderate toxicity to E. fetida with LC50 values of 10.7, 12.7, and 61.3 μg∙cm-2, respectively; quinclorac, MCPA-Na, topramezone, glufosinate ammonium, nicosulfuron, and bispyribac-sodium were low toxicity to E. fetida with LC50 values of 143.0, 198.2, 211.1, 466.9, 433.7, and 649.2 μg∙cm-2, respectively; pyrazosulfuron-ethyl, penoxsulam, pyribenzoxim, cyhalofop-butyl, fluoroglycofen, pendimethalin, and mesotrione were slight toxicity to E. fetida with LC50 values greater than 1000 μg∙cm-2. Results of 14 d by the artificial soil toxicity bioassay, haloxyfop-R-methyl showed the highest toxicity to E. fetida with LC50 value of 148.9 mg∙kg-1; followed by pretilachlor, MCPA-Na, pendimethalin, and metamifop, the LC50 values were 211.5, 335.0, 342.4, and 345.7 mg∙kg-1, respectively; the other tested herbicides were low toxicity to E. fetida with LC50 values greater than 500 mg∙kg-1. According to the guidelines of environmental safety evaluation for chemical pesticides, the 17 herbicides determined by an artificial soil toxicity bioassay were low toxicity to E. fetida. The results of this study can provide new data information for assessing the ecological risk of herbicides to earthworm, and also provide technical guidance for the safe use of herbicides in agricultural production.

Key words: earthworm, herbicide, acute toxicity, Eisenia fetida, ecological environment

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