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Position: Home > Articles > Degradation Behavior of Thifensulfuron-methy in the Different Soils Agrochemicals 2012,51 (1) 58-60

噻吩磺隆在不同类型土壤中的降解行为

作  者：
李新安;赵华;李广领;陈锡岭
单  位：
浙江省农业科学院农产品质量标准研究所;河南科技学院资源与环境学院
关键词：
噻吩磺隆;土壤;降解行为
摘  要：
[目的]采用实验室模拟试验研究了好氧和厌氧环境中噻吩磺隆在衢州红土、萧山潮土、金华水田土中的降解行为,为其环境和生态安全性评价提供重要的科学依据。[方法]样品经乙腈提取,高效液相色谱仪(DAD检测器)检测。[结果]在好氧和厌氧环境中,噻吩磺隆在3种不同类型土壤中的降解速率大小均为潮土>水田土>红土,好氧环境中降解半衰期分别为2.7、5.6、9.8 d,厌氧环境中降解半衰期分别为7.6、11.1、13.7 d,降解符合一级动力学方程。[结论]土壤中好氧微生物和土壤pH值对噻吩磺隆的降解有显著影响。根据《化学农药环境安全评价试验准则》划分标准,噻吩磺隆在土壤中为易降解农药。
译  名：
Degradation Behavior of Thifensulfuron-methy in the Different Soils
作  者：
LI Xin-an1,ZHAO Hua2,LI Guang-ling1,CHEN Xi-ling1(1.College of Resources and Environment,Henan Institute of Science and Technology,Xinxiang 453003,Henan,China; 2.Institute of Quality and Standard for Agro-products,Zhejiang Academy of Agricultural Sciences,Hangzhou 310021,China)
关键词：
thifensulfuron-methy;soil;degradation behavior
摘  要：
The degradation behavior of thifensulfuron-methy was studied under aerobic and anaerobic conditions by laboratory simulation in three different soils,including krasnozem from Quzhou,fluvo-aquic soil from Xiaoshan and paddy field soil from Jinhua to supply the important scientific evidence of the environment and ecological safety.[Methods] Samples were extracted with acetonitrile,determined by reversed-phase HPLC with an ultraviolet detector.[Results] The degradation rate of thifensulfuron-methy in the three soils was fluvo-aquic soil>paddy field soil>krasnozem,with the corresponding half-lives 2.7,5.6,9.8 d in aerobic condition,and 7.6,11.1,13.7 d in the anaerobic,respectively.The degradation of thifensulfuron-methy in soils followed the first-order kinetics.[Conclusions] The degradation of thifensulfuron-methy in soils was influenced by soil aerobic microorganism and pH.Based on the dividing standard of guidelines on environmental safety assessment for chemical pesticides,thifensulfuron-methy belongs to easily degradable pesticide in soil.

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