【摘要】 [目的]研究江汉平原涝渍地土壤中苄嘧磺隆的残留动态,为苄嘧磺隆的合理施用以及减小对环境的污染提供理论指导,也为正确评价环境中苄嘧磺隆的监测、迁移以及土壤的修复提供科学的依据。[方法]采用高效液相色谱法,测定了苄嘧磺隆在江汉平原涝渍地土壤中的残留。[结果]自然条件下苄嘧磺隆在涝渍地6个土系中的降解呈现一定的规律。在无涝渍灾害的江汉系和涝渍灾害最严重的万全系,苄嘧磺隆的半衰期比其他土系长,其他土系之间没有明显的变化。在江汉系、高场系、四湖系、横沟乡系、观音土当系、万全系6个土系中,苄嘧磺隆降解半衰期分别为37.0、16.5、14.9、17.8、19.74、2.0 d。[结论]土壤中有机质的增加、含水量的增大、温度的增加及酸性土壤都有利于苄嘧磺隆的降解,土壤本身的理化性质是其主要原因。更多还原

【Abstract】 [Objective] The research aimed to study the residue dynamics of bensulfuron-methyl in soil of waterlogged-land area in Jianghan Plain,provide theoretical instruction for reasonable application of bensulfuron-methyl and pollution abatement in the environment and scientific basis for correct evaluation on the monitoring and transfer of bensulfuron-methyl in the environment and the soil remediation.[Method] The residue of bensulfuron-methyl in soil of waterlogged-land area in Jianghan Plain was determined by using HPLC.[Result] The results showed that the degradation of bensulfuron-methyl in 6 typical soil series of waterlogged land in Jianghan Plain showed certain change laws.In the soil of Jianghan series without water-logging disaster and Wanquan series with the most serious water-logging disaster,the degradation half-life time was higher than 4 other soil series.In the rice field soil of the 6 soil series,the degradation halflife time respective was 37 d in Jianghan series,16.5 d in Gaochang series,14.9 d in Four-lake series,17.8 d in Henggouxiang series,19.7 d in Guangyindang series,and 42 d in Wanquan series.[Conclusion] The increase of organic matter in soil,the increase of water content,the temperature increase and acid soil are beneficial to the degradation of bensulfuron-methyl.The physical and chemical prosperities were the main causes.更多还原