3种拟除虫菊酯农药在海南土壤中的降解特性  

Degradation Characteristics of Three Different Pyrethroid Pesticides in Soil in Hainan

作　　者：郑钊 许佳彬 王威[1] 邹丽君 梁晓宇 王萌[1,2] 张宇 ZHENG Zhao;XU Jiabin;WANG Wei;ZOU Lijun;WANG Meng;ZHANG Yu(College of Plant Protection,Hainan University,Haikou,Hainan 570228,China;Ministry of Agriculture and Rural Affairs Agricultural Products Quality and Safety Risk Assessment Laboratory,Haikou,Hainan 570228,China)

机构地区：[1]海南大学植物保护学院,海口570228 [2]农业农村部农产品质量安全风险评估实验室,海口570228

出　　处：《热带生物学报》2019年第3期243-248,共6页Journal of Tropical Biology

基　　金：海南省重点研发项目(ZDYF2018062);国家农产品质量安全监管经费项目(GJFP2019006)

摘　　要：采用室内模拟方法,以海南沙土和壤土为代表土壤,研究了拟除虫菊酯农药功夫菊酯、高效氯氰菊酯和联苯菊酯在土壤中的降解动态。结果表明:3种拟除虫菊酯农药在土壤中的降解均符合一级动力学方程。好氧条件下,3种农药在沙土中的降解半衰期分别为115.52,115.52,99.02 d,壤土中分别为99.02,49.51,99.02 d。厌氧条件下,沙土中降解半衰期为49.51,49.51,57.76 d,壤土中分别为30.13,34.66,57.76 d。3种拟除虫菊酯农药在沙土中的降解较壤土慢,且厌氧条件下降解速度显著快于好氧条件。The degradation characteristics of three pyrethroid pesticides, cyhalothrin and beta-cypermethrin and bifenthrin, were studied in sandy soil and loam in Hainan province with indoor simulation method. The results showed that the degradation of these three pesticides in soils conformed to the first kinetic equation. Under aerobic condition, the cyhalothrin and beta-cypermethrin and bifenthrin had a respective half-life degradation of 115.52 d, 115.52 d and 99.02 d in sandy soil, and 99.02 d, 49.51 d and 99.02 d in loam. Under anaerobic condition, the half-life degradation of cyhalothrin and beta-cypermethrin and bifenthrin were 49.51 d, 49.51 d and 57.76 d in sandy soil, and 30.13d, 34.66d and 57.76 d in loam, respectively. These results showed that the degradation rates of cyhalothrin and beta-cypermethrin and bifenthrin were lower in sandy soil than in loam. The degradation rates of cyhalothrin and beta-cypermethrin and bifenthrin were significantly higher under anaerobic condition than under aerobic condition.

关 键 词：拟除虫菊酯 土壤 降解 生态安全 

分 类 号：S482.35[农业科学—农药学]