摘要
施甲基对硫磷 7.5、15和 2 2 .5kg·hm-2 (a .i.)时 ,韭菜中最终平均农药残留量为 0 .6 33、1.2 70和1.90 1mg·kg-1,自然降解率分别为 98.94 %、96 .4 4 %和 96 .0 4 % .施用高效农药残留降解菌剂能显著地降低农药残留的含量 ,施用 75kg·hm-2 降解菌剂时 ,韭菜与土壤中平均农药残留量分别为 0 .2 6 9、0 .0 99mg·kg-1,与不施菌对照相比 ,能使农药进一步降低 78.82 %和 98.6 8% .降解率随着菌剂用量增加而升高 ,当用量超过 75kg·hm-2 时降解率不再提高 .菌剂施用时间以施药后
Degradation of methyl parathion in soil and Chinese chive by strain DLL-1 was studied. Usage of methyl parathion at 7.5, 15, and 22.5 kg(a.i.)·hm -2 resulted in the average amount of residue of 0.663, 1.270, and 1.901 mg.kg -1 in Chinese chive respectively. The natural degradation rate was 98.94%, 96 44%, and 96.04% corresponding to the 3 levels of usage. The amount of pesticide residue could be significantly decreased through the application of high effective degrading microbial agents. The amount of pesticide residue in Chinese chive and soil was 0.269 and 0.099 mg·kg -1 with the usage of 75 kg·hm -2 of degradation bacterium, which was decreased by 78.82% and 98.68% compared with the control. Increasing the bacterium usage led to the increase of degradation rate. Usage of degradation bacterium more than 75 kg·hm -2 did not increase the degradation rate further. The best time of the application of the degrading microbe was 3 days after the application of the pesticide.
出处
《应用生态学报》
CAS
CSCD
2004年第2期295-298,共4页
Chinese Journal of Applied Ecology
基金
农业部
财政部农业科技跨越计划 (M 2 0 0 0 15 )
国家"十五"科技攻关项目 ( 10 0 2 0 0 2BA5 16A)
国家"863"高技术发展计划资助项目(A2 0 0 12 460 81)
关键词
降解菌
甲基对硫磷
农药残留
降解率
Degrading bacterium, Methyl parathion, Pesticide residue, Degrading rate.
