^（14）C—苄嘧磺隆在渍水土壤中的残留动态  

Dynamic residual of ￣(14)C-bensulfuron-methyl in waterlogged soil

作　　者：程薇[1] 陈祖义[1] 

机构地区：[1]南京农业大学

出　　处：《核技术》1996年第7期436-439,共4页Nuclear Techniques

基　　金：农业部85-06-02-03专题研究内容

摘　　要：应用核素示踪技术研究了１４Ｃ－苄嘧磺隆在室内暗培养渍水条件下土壤中的残留动态。结果表明，１４Ｃ－苄嘧磺隆在不同土壤中消解速率不同：在碱性土壤中的消解速率比在中性土壤中缓慢，在黄棕壤（中性）中的残留半衰期为６２天，而在黄潮土（碱性）中为１２９天。还发现苄嘧磺隆在渍水条件上壤中结合残留明显，且增长趋势较快，１０４天时结合残留占原始量的３４．１５％，１６５天时达４６．４５％。A radioactive tracing technique was used to estimate the environmental safeness of a weedicide (bensulfuron-methyl). It was revealed that different kinds of waterlogged soil have different speeds of degradation for 14C-bensulfuron-methyl applied under a dark culture condition indoor. The degradation in alkaline soil is slower than that in neapal soil, e.g. in neutral yellow brown end the residual half-life is 62 dsys, whereas that in alkaline yellow fluvo-aquiv earth is 129 days.The bound residue of 14 C-be nsulfuron-methyl in waterlogged soil is evident and increases with time. For example, on the 104th day, the bound residue is 34.15% of primitive activity while that on the 165th day is 46.45%.

关 键 词：苄嘧磺隆 渍水 土壤 残留半衰期 碳14示踪 

分 类 号：S481.8[农业科学—农药学] TQ450.263[农业科学—植物保护]