三唑醇及其对映异构体在3种不同类型土壤中的降解动态  

Degradation dynamics of triadimenol and its enantiomers in three different types of soil

作　　者：鹿文红[1,2] 王继红[1] 张春荣[3] 何红梅[3] 张昌朋[3] 赵华[3] 平立凤[3] 

机构地区：[1]吉林农业大学资源与环境学院,长春130118 [2]上海格瑞产品检测有限公司 农业部设施园艺产品质量安全控制重点实验室,上海201210 [3]浙江省农业科学院农产品质量标准研究所,杭州310021

出　　处：《农药学学报》2014年第5期570-579,共10页Chinese Journal of Pesticide Science

基　　金：浙江省"农产品安全标准与检测技术"重点科技创新团队项目(2010R50028);浙江省科技厅公益性项目(2013C32012)

摘　　要：实验室条件下,初步研究了手性农药三唑醇及其非对映异构体三唑醇A(对映异构体1R,2S体和1S,2R体的混合物)与三唑醇B(对映异构体1R,2R体和1S,2S体的混合物)在浙江杭州潮土(有机质含量1.90%,pH 6.85)、金华水稻土(有机质含量1.63%,pH 4.94)和兰溪红土(有机质含量0.38%,pH 4.03)中的降解动态及对映体之间相互转化的情况。结果表明:三唑醇在潮土、水稻土和红土中的降解半衰期分别为56.4、105.0和154.0 d,180 d时降解率分别为91.9%、79.2%和57.7%;三唑醇在潮土中发生两次三唑醇A体向B体转化和1次三唑醇B体向A体的转化,而在水稻土和红土中,三唑醇A体与B体之间相互各转化1次。表明三唑醇对映异构体的降解动态因土壤性质不同而存在差异。研究结果为三唑醇的科学合理使用及其环境风险评估提供参考。The degradation dynamics of triadimenol and its enantiomers in fluvo-aquic soil （ organic substances content is 1. 90%, pH 6. 85）from Hangzhou city in Zhejiang Province, paddy soil（organic substances content is 1. 63%, pH 4. 94 ） from Jinhua city and red soil （ organic substances content is 0. 38%, pH 4. 03） from Lanxi city under laboratory conditions were investigated. The results showed that half-lives of triadimenol were 56. 4, 105. 0 and 154. 0 days in fluvo-aquic soil, paddy soil and red＆nbsp;soil, respectively. The degradation rate of triadimenol at 180 days were 91. 9%,79. 2% and 57. 7%, respectively. Triadimenol-A transformed to triadimenol-B twice and triadimenol-B transformed to triadimenol-A once in fluvo-aquic soil. Triadimenol-A transformed to triadimenol-B once and triadimenol-B transformed to triadimenol-A once in paddy soil and red soil. In conclusion, triadimenol enantiomers′degradation dynamics varied in different soils.

关 键 词：三唑醇 对映异构体 土壤 降解动态 半衰期 

分 类 号：TQ450.26[化学工程—农药化工]