土壤粒度与含水量对太阳光降解百草枯的影响.pdfVIP

安徽农业科学袁允燥怎则灶葬造 燥枣 粤灶澡怎蚤 粤早则蚤援 杂糟蚤援 圆园园7袁35渊8冤院2370-2371袁2374 责任编辑 金琼琼 责任校对 左佳 土壤粒度与含水量对太阳光降解百草枯的影响 郑文 唐文浩 华南热带农业大学环境与植物保护学院 海南儋州 袁 袁 571737冤 摘要 通过模拟自然土壤条件 比较不同土壤类型 粒度与含水量对太阳光降解百草枯的影响 结果表明 百草枯在花岗岩砖红壤中 袁 尧 遥 袁 比在玄武岩砖红壤中易被太阳光降解 同时 得出了在同一土壤类型不同粒度大小 不同土壤含水量下将得出太阳光降解百草枯后 遥 袁 尧 残留量的变化趋势遥 关键词 百草枯 土壤粒度 土壤含水量 太阳光 降解 曰 曰 曰 曰 中图分类号 S152.7 文献标识码 A 文章编号 0517-6611 2007冤08-02370-02 Influence of Soil Granularity and Moisture on Paraquat Degradation Caused by Sunlight ZHENG Wen et al (College of Environment and Plant Protection, South China University of Tropical Agriculture, Danzhou, Hainan 571737) Abstract By simulating natural soil condition, artificial influence of paraquat amounts, soil granularity, soil moisture and soil temperature on paraquat degradation caused by sunlight were studied. Residual amount of paraquat after degradation was analyzed. Effect of different soil type, soil granularity and soil moisture on paraquat degradation was compared. Simulated experiment indicated that paraquat degradation in granite brick red earth was easier than that in basalt brick red earth. Residual amount of paraquat after sunlight degradation changed significantly in different soil granularity and moisture of the same soil type. Key words Paraquat; Soil granularity; Soil moisture; Sunlight; Degradation 除草剂的大量施用 污染了很多地区的土壤和地下水 中 定容 混匀 再准确吸取 稀释至 得到百草 袁 袁 袁 袁 遥 10 ml 100 ml 袁 已引起学术界和公众的广泛关注 降解是影响土壤中除草 枯标准溶液 遥 遥 剂存在的重要机制之一[1] 由于不同土壤类型 质地 特性和