恶唑菌酮土壤降解影响因子研究  

Degradation of Famoxadone in Soils and Its Affecting Factors

作　　者：李彦文[1] 杨仁斌[2] 郭正元[2] 

机构地区：[1]暨南大学环境工程系,广州510632 [2]湖南农业大学资源环境学院,长沙410128

出　　处：《土壤》2007年第3期474-478,共5页Soils

基　　金：农业部农药登记中美合作基金项目资助。

摘　　要：探讨了土壤环境中的主要因素:土壤微生物、温度、含水量、pH值以及施用有机肥对恶唑菌酮降解的影响。结果表明:土壤微生物对恶唑菌酮在土壤中的降解起着重要作用,相同条件下灭菌土壤的降解半衰期是非灭菌土壤的27.6倍。环境温度、土壤含水量等对恶唑菌酮降解也有影响,在15℃～40℃的试验条件下,随着温度升高,恶唑菌酮的降解速率加快,特别是15℃～25℃温度范围内降解速率上升较快;过高和过低的土壤含水量都不利于土壤中恶唑菌酮的降解,土壤含水量为50%FC～100%FC时适宜恶唑菌酮的降解;此外施用有机肥会加速恶唑菌酮的降解;而土壤pH值对降解的影响不显著。Effects of soil microorganism, temperature, soil moisture and pH on degradation of famoxadone were studied. Data showed that DT50 of famoxadone in sterilized soil was 27.6 times slower than in non-sterilized soil, indicating microorganism was a dominant factor affecting degradation of famoxadone in soil. Some environment factors including temperature, soil moisture, etc. could also affect degradation of famoxadone in soil. The degradation was accelerated significantly when the temperature increased from 15℃ to 40℃, especially from 15℃ to 25℃. It was optimal for famoxadone to degrade, when soil moisture was in the range of 50% FC - 100% FC. But soil pH did not have much influence on the degradation.

关 键 词：恶唑菌酮 土壤 降解 环境因子 微生物 

分 类 号：S482.26[农业科学—农药学] X131.3[农业科学—植物保护]