摘要
从活性污泥的富集培养物中分离得到可降解几种拟除虫菊酯农药的菌株qw5,初步鉴定qw5为地衣芽孢杆菌 (Bacilliuslicheniformis)。菌株qw5在通气、pH7～ 8、温度 3 0℃左右的环境条件下生长较好。培养 5天 ,菌株qw5对氰戊菊酯、氯氰菊酯、溴氰菊酯的降解率分别为 5 3 .8%、41 .2 %和 61 .7%。经质谱分析 ,菌株qw5降解氰戊菊酯产生中间代谢产物 3 -苯氧基苯甲醛。qw5对小白鼠无致病力 ,对几种常用的抗生素敏感。盆钵和小区试验表明 ,菌株qw5对青菜中残留的拟除虫菊酯有明显去除效果。
Summary A pyrethroids degrading strain qw 5 was isolated from activated sludge. The strain qw 5 was preliminarily identified as Bacillius Licheniformis . The optimum temperture and pH for the aerobic degradation of pyrethroids by qw 5 were 30℃ and pH7～8. The strain was able to degrade Fenvalerate,Cypermethrin and Deltamethrin by approximately 53.8%,41.2% and 61.7% respectively within five days. Benaldehyde,3 phenoxy,the metabolite of Fenvalerate was detected by mass spectrum. The strain was not pathogenic to white mice and sensitive to some commonly used antibiotics. The results from pot and field experiments showed that the strain had obvious effect on the removal of pyrethroids residual in green vegetable.
出处
《土壤学报》
CAS
CSCD
北大核心
2003年第1期123-129,共7页
Acta Pedologica Sinica
基金
国家 8 63项目 (SZO3 0 8)
农业部财政部农业科技跨越计划 (M2 0 0 0 1 1 )
