摘要
实验室条件下,研究了氟虫腈在东北黑土、江西红壤和太湖水稻土中的降解特性。结果表明,氟虫腈在土壤中降解较慢,其在好气条件下的东北黑土、江西红壤和太湖水稻土中的降解半衰期分别为165、267和42d,在渍水条件下的3种土壤中的降解半衰期分别为31、173和32d。氟虫腈在pH偏中性的太湖水稻土中降解最快;微生物对氟虫腈在土壤中的降解起主要作用;渍水条件有利于氟虫腈的降解,推测降解氟虫腈的微生物主要是厌氧菌属。
The degradation of fipronil in soils was studied under laboratory conditions. Three kinds of soil,including （namely） black soil from Northeast of China, red soil from Jiangxi Province of China and rice soil from Jiangsu Province of China, were used in the research. Results indicated that fipronil degraded slowly in these soils. The half-life of fipronil under aerobic condition were 165 d,267 d and 42 d in black soil, red soil and rice soil, respectively. The half-life of fipronil under anaerobic condition was 31 d, 173 d and 32 d in black soil ,red soil and rice soil ,respectively. Fipronil degraded fast in rice soil in both conditions. It＇s deduced that the bin-degradation of fipronil in these soils played a main role. As the degradation of fipronil was accelerated under anaerobic condition, it was supposed that anaerobic bacteria in soil may be the key factor in fipronil degradation.
出处
《农药学学报》
CAS
CSCD
2008年第3期335-342,共8页
Chinese Journal of Pesticide Science
基金
"十一五"国家科技支撑计划项目(2006BAK02A0406)
关键词
氟虫腈
降解
土壤
代谢产物
半衰期
fipronil
degradation
soil
metabolites
half-life
