环境条件和微生物对灭线磷降解的影响

环境条件和微生物影响灭线磷在土壤中的降解。随着土壤含水量和温度的增加,灭线磷的降解速度加快;微生物对灭线磷的降解有显著影响,30℃、含水量为40%条件下,未灭菌土中灭线磷的半衰期为16.6 d,灭菌土中灭线磷的半衰期为31.6 d;有机质对灭线磷的降解也有显著影响,有机质含量高,有利于灭线磷的降解;灭线磷在碱性土壤中的降解快于在酸性土壤中;30℃、含水量为40%条件下,灭线磷在3种土壤中的降解速度为:东北黑土＞广东红土＞山东砂壤土。

Effect of Environmental Conditions and Microbes on Degradation of Ethoprophos in Soil

The degradation of ethoprophos in soil varied with the envionmental conditions and the microbes. The degradation rate of ethoprophos increased with increasing of soil temperature and soil water content.The microbes enhanced ethoprophos degradation in soil,when soil temperature was 30℃ and soil water content was 40%,the half-life of ethoprophos in the unsterilized soil was 16.6 days and 31.6 days in the sterized soil.The degradation of the chemical in alkialine soil was higher than in acid soil. The degradation rate in three kinds of soils was different,the order was as follows:black soil of northeast>red soil of guangdong>sandy loam soil of shandong.