除草剂苄嘧磺隆在稻田环境中降解动态研究

除草剂苄嘧磺隆在稻田环境中降解动态研究(8700字)
摘　要:本论文选择除草剂卞嘧磺隆为对象。采用大田试验方法和液相色谱检测，得出分析方法添加回收率，添加浓度在0.05mg/kg~0.1mg/kg时，田水回收率在88.1%~95.7%之间，田土回收率在89.8%~92.1%之间， 稻壳回收率在89.9%~94.3%之间，植株回收率在85.3%~87.2%之间。方法最小检出量是4.0×10-11g。对苄嘧磺隆的降解动态进行试验，长沙 杭州两地的试验结果表明：①残留消解半衰期，植株为3．0—3．5 d，田水为6．8～8．1 d，土壤为8．6—10．1 d。苄嘧磺隆的残留在稻田、水、土壤、植株的残留量都小于0.02 mg∥kg.     
关键词：除草剂;苄嘧磺隆;添加法;最小检出量; 残留量

The dynamic research about degradation of Bensulfuron methyl on the rich field
Abstract: Bensulflon-methyl ,which was select the paper herbicide targeted.. through the improvent methods , a rapid method has been developde for the determination of accetochor and bhtachlor in bensulfuron methyl and the linear range is from 0.01mg/L to 0.05mg/L.The Recoveries of Acetochor in field of water range from 88.1%-95.7% . And the recoveries of Acetochor in rich field 89.8%-92.1% , such as rice hush89.9%-94.3% , while plant’s recoveries of Acetochor 85.3%-87.2 . The method is sensitive , fast and repeatable .  result of the two side experiments showed that: (1)Halfllfe：3．0—3．5sdays inField ，6．8—8．1 day．In water，8．6—10．1 days in soil； the final residue in rough rice,husk,soil,rice straw was all ≤0．02mg/kg．