恶唑菌酮在土壤中淋溶迁移影响因子研究  

Factors Affecting Transferability of Famoxadone in Soil

作　　者：李彦文[1] 郭正元 杨仁斌 

机构地区：[1]暨南大学环境工程系,广州510630 [2]湖南农业环境保护研究所,长沙410128

出　　处：《土壤》2007年第2期270-273,共4页Soils

基　　金：农业部农药登记中美合作基金项目(2003003)资助。

摘　　要：采用土柱淋溶方法研究了恶唑菌酮在土壤中的淋溶迁移影响因子。结果表明:恶唑菌酮在土柱中的垂直分布随着施药量、降雨量和降雨强度的改变而变化。当施药量从175μg增加到700μg或降雨量从50mm增至200mm时恶唑菌酮的最大淋溶深度随着农药施用量和降雨量的加大而加深;而随着降雨强度的增大,恶唑菌酮的最大淋溶深度减小。不同表面活性剂污染对恶唑菌酮在土壤中的淋溶迁移有显著影响,但作用结果不同。在实验浓度下阴离子和非离子表面活性剂污染对恶唑菌酮的淋溶迁移有促进作用,而阳离子表面活性剂污染则会阻滞恶唑菌酮的淋溶迁移。Factors affecting transferability of famoxadone in soil were studied with the soil column leaching method. Results showed that vertical distribution of famoxadone in the soil column varied with pesticide application rate, rainfall, precipitation intensity. The maximal leaching depth of famoxadone in the soil increased with application rate and rainfall when they were in the range from 175 lag to 700 μg and from 50 mm to 200 mm, respectively, but decreased with precipitation intensity. Surfactant contamination of the soil could affect transferability of famoxadone in the soil dramatically. Anionic surfactant （SDBS） and nonionic surfactant （Tween-80） could promote transfer of famoxadone, while cationic surfactant （CRAB） prevent using the experimental concentrations. 　

关 键 词：柱淋溶 表面活性剂 恶唑菌酮 污染土壤 

分 类 号：X592[环境科学与工程—环境工程] S482[农业科学—农药学]