摘要
本文介绍了除草剂氟乐灵在室内外条件下不同土壤中的降解动力学特征及其主要影响因素。结果表明氟乐灵在土壤中的降解主要形成脱烷基和硝基还原产物,降解物的种类和数量的分布均受土壤条件控制;各种处理中氟乐灵的降解半衰期t_(1/2)多集中于30—90天,但在有机质含量较高或水份含量≤6％的土壤中具有较长的t_(1/2)。适当增加土壤水份含量和提高土壤温度可促进微生物活性,有利于氟乐灵的生物降解。
This paper deals with the dynamics of trifluralin degradation and its main affected factors in soils under field and pot experimental conditions. The results show that dealkyl -and nitro -reduced compounds are the main degradation products of trifluralin in soils, whose kind and amount depend on soil conditions. In different treatments, its t_(1/2) is concentrated in 30-90 days, but more longer when organic matter content is higher or soil moisture content iS ≤6％. The increase of soil moisture content and temperature can be promoted microbial activity, and is of advantage to biodegradation of trifluralin.
出处
《应用生态学报》
CAS
CSCD
1993年第4期418-422,共5页
Chinese Journal of Applied Ecology
基金
国家自然科学基金
关键词
氟乐灵
土壤
降解
影响因素
生态学
Trifluralin, Soil, Degradation product, Degraded rate, Microbial activity.
