苯醚甲环唑在土壤中的降解动力学及其影响因子  

Study on Degrading Dynamics of Difenoconazole in Soils and Its Affecting Factors

作　　者：王军[1,2] 温家钧[1] 边侠玲[1] 花日茂[2] 汤锋[3] 

机构地区：[1]安徽省化工研究院,合肥230041 [2]安徽农业大学资源与环境学院,合肥230036 [3]国际竹藤网络中心,北京100102

出　　处：《西北农业学报》2009年第6期342-346,共5页Acta Agriculturae Boreali-occidentalis Sinica

基　　金：农业部农药残留项目资助

摘　　要：研究了苯醚甲环唑在北京、萧县、杭州及长沙4个地区土壤中的降解动力学,并探讨了土壤微生物、温度、含水量及药剂质量分数对其降解的影响。结果表明：苯醚甲环唑在4个地区土壤中的降解半衰期为11.63-21.77 d。土壤微生物对苯醚甲环唑降解起主导作用,灭菌土壤降解半衰期是非灭菌条件下的6.09倍;15-40℃范围内,温度升高,土壤中苯醚甲环唑降解加快,15-25℃降解速率增加幅度较大;士壤含水量过高（150%）和过低（25%）都不利于苯醚甲环唑降解,而土壤中药剂质量分数的增大对苯醚甲环唑降解则起阻碍作用。The degradation dynamics of difenoconazole in soils of four areas of Beijing,Xiaoxian,Hangzhou and Changsha were studied respectively,and the effect of soil microorganism,temperature,water-holding content and fortified concentration on degradation of difenoconazole were also investigated.The result showed that the half-life of difenoconazole is 11.63～21.77 d in soils of four areas.Data also showed that difenoconazole in sterilized soil is 6.09 times of that in non-sterilized soil,indicating the microorganism is a dominant factor afecting degradation of difenoconazole in soil.In range of l5℃～40℃,difenoconazole degrades rapidly with the temperature of soil,especially from l5℃ to 25℃,the degradation is accelerated significantly.It is not optimal for difenoconazole to degrade in too high（150%） or too low（25%）soil moisture.But the degradation rate will decrease when the fortified concentration goes up.

关 键 词：苯醚甲环唑 土壤 降解动态 影响因子 

分 类 号：X592[环境科学与工程—环境工程]