杀虫双对土壤脲酶影响的研究  

Study on soil urease activity effected by dimehypo

作　　者：和文祥[1] 蒋新[1] 余贵芬[1] 卞永荣[1] 

机构地区：[1]中国科学院南京土壤研究所

出　　处：《土壤与环境》2002年第1期1-5,共5页Soil and Environmental Sciences

基　　金：中国科学院知识创新工程重要方向项目(KZCX2-401);国家重点基础研究发展规划项目(G1999011801-3)

摘　　要：通过对土壤脲酶受杀虫双影响的研究．结果表明,杀虫双对不同生态区土壤脲酶活性具有明显的抑制作用,随杀虫双浓度的增加,酶活性持续减小、计算得到了土壤酶活性的生态剂量ＥＤ５０值,获得了北方(?)土和南方红壤污染的;临界浓度为４８９和２４６ｇ/ｋｇ;Ｌａｎｇｍｕｉｒ模型可较好表征酶活性与尿素浓度间的定量关系;土壤脲酶活性和最大表观酶活性均可表征土壤受杀虫双污染程度的大小。This paper mainly study on soil urease activity effected by dimehypo, the results showed that dimehypo has remarkable inhibitory on soil urease activity in different ecological zones, soil urease activity reduced with dimehypo concentration increasing, their relationship can be expressed by equation U=1/(β1×C+β0), The ecological dose ED50 is 4.89 and 2.46 g/kg in Lou soil and Red soil respectively. Langmuir model can better express the relationship between enzyme activity and urea concentration quantitatively. Soil urease activity and maximum surface urease activity can be indexes of soil polluted by dimehypo.

关 键 词：杀虫双 土壤脲酶活性 生态剂量 土壤污染 农药 

分 类 号：X592[环境科学与工程—环境工程] S482.3[农业科学—农药学]