抑制剂和温度影响的土壤脲酶热力学特征  

Thermodynamic characteristics of soil urease under influence of inhibitors and temperature

作　　者：隽英华[1,2] 陈利军[1] 武志杰[1] 周礼恺[1] 汪仁[2] 

机构地区：[1]中国科学院沈阳应用生态研究所,沈阳110016 [2]辽宁省农业科学院环境资源与农村能源研究所,沈阳110161

出　　处：《辽宁工程技术大学学报（自然科学版）》2010年第6期1149-1152,共4页Journal of Liaoning Technical University (Natural Science)

基　　金：中科院知识创新工程重要方向基金资助项目(KZCX3-SW-445);国家科技支撑计划基金资助项目(2006BAD10B00)

摘　　要：通过模拟方法研究了脲酶抑制剂和温度影响下的土壤脲酶热力学特征。结果表明,HQ使活化能Ea、温度系数Q10和活化焓变ΔH略有降低,而PPD和NBPT则使它们略有增大。随温度升高,土壤脲酶热力学参数逐渐降低。相关分析表明,仅有活化能Ea与土壤肥力密切相关,表明应用热力学参数评价土壤肥力的高低还需要进一步的证实。In this study,the thermodynamic parameters of soil urease under the influence of urease inhibitors and temperature were investigated.The results show that thermodynamic parameters Ea,Q10 and ΔH with HQ treatment slightly decrease,but those with PPD and NBPT treatments slightly increase.As temperature increases,the thermodynamic parameters of soil urease decrease.Correlational analysis indicates that there is a close correlation between activation energy（Ea） and soil fertility,which shows that a further study is required to determine whether thermodynamic parameters of enzymes can be used as the indexes for evaluating soil fertility.

关 键 词：温度 脲酶抑制剂 脲酶 热力学参数 

分 类 号：S1[农业科学—农业基础科学]