几种元素污染对辽东湾湿地脲酶活性的影响  

Effects of several elements on urease activity in Liaodong bay wetland

作　　者：万惠萍[1] 叶淑红[2] 丁鸣 曹方[2] 

机构地区：[1]大连工业大学化工与材料学院,辽宁大连116034 [2]大连工业大学生物与食品工程学院,辽宁大连116034 [3]大连西岗区疾病预防控制中心,辽宁大连116011

出　　处：《大连轻工业学院学报》2007年第2期156-159,共4页Journal of Dalian Institute of Light Industry

基　　金：辽宁省教育厅科研资助项目(05L080);辽宁省发酵工程重点实验室开放课题资助项目(辽发2006-009)

摘　　要：向湿地土壤添加Cd、Cr、Pb和As,考察了样品中的脲酶活性.单因素和复合因素污染均抑制脲酶活性.出现酶活力峰值的时间随着因素水平的影响后移.单因素影响为Cr>As>Cd>Pb.抑制作用主要在于元素抑制了脲酶活性,并且抑制了合成分泌脲酶的微生物.各因素对脲酶影响之间呈显著相关或相关.Urease in wetland was inhibited by the metal Cd, Cr, Pb and As. Both individual metal and combined metals inhibited urease and postponed the time of maximum urease activity. The order of urease inhibition was showed as Cr〉As〉Cd〉Pb. It was presumed that the inhibition was due to the inhibition of urease activity or urease production. The presence of metals is correlated with urease activity.

关 键 词：湿地 污染 脲酶 

分 类 号：X591[环境科学与工程—环境工程]