土壤微生物对氯磺隆降解的研究

The Study of Chlorsulfuron'degradation By Soil Microorganism

利用生物测定方法研究氯磺隆[1-(2-氯苯基)-3-(4-甲基-6-甲氧基-1,3,5-三嗪-2基)磺酰脲在灭菌土壤、未灭菌土壤以及灭菌后接种青霉菌的土壤中的残留动态。结果表明:高压灭菌土壤中氯磺隆的降解能力,甚至加快了对氯磺隆的降解。除了微生物对氯磺隆进行隆解外,化学水解也是氯磺隆在土壤中隆解的重要途径之一。土壤pH值对氯磺隆的水解有很大的影响,酸性条件更有利于氯磺隆的水解。

The residue dynamics of chlorsulfuron {2-chloro-N-[[(4-methy-6-methoxy-1,3,5-triazin-yl)amino]carbony] benzene-sulfon-amide} in sterilized soil、nonsterilized soil and sterilized soil which reinoculated with penicillium sp. Was studied by plant bioassay way. Results demonstrated: the speed of chlorsulfuron dissipated in nonsterilized soil is one-dot-five to two times as rapid as that in sterilized soil, while, the ability for degradation of chlorsulfuron was restored by reinoculated with penicillium sp, what even accelerate degradation of chlorsulfuron. In addition to microbial breakdown, chemical hydrolysis was also an important approach in the disappearance of chlorsulfuron from soil. Soil pH was of great effect on hydrolysis of chlorsulfuron, with hydrolysis occurring most rapidly in acidic condition.