摘要
在不同温度和底物浓度条件下，对陕西７种土壤１９个土样脲酶的活性进行了测定。结果显示，在一定温度和底物浓度范围内，随温度和底物浓度增加，脲酶活性升高，在不同温度和浓度区段，影响幅度有明显差异，除水稻土外，其余高肥力土样脲酶活性受其影响较大；在同一生态区中，脲酶活性与理化性质呈极显著正相关，土壤脲酶活性可作为土壤肥力水平高低的重要指标之一；土壤脲酶作用的最适温度为６０℃．
The urease activities are assayed at different temperatures and substrate concentrates in nineteen samples of seven main soil types in Shaanxi Province.It shows as follows:the urease activities increase with temperature and substrate concentrates rise.The degree of increase exhibits remarkable difference.Except Shuidao soil,the other higher fertile soil urease activities are more influenced quite seriously.In the same ecological region,the urease activities have a very remarkable positive correlation with the physical chemical properties.It can serve as one of the important indexes of soil fertility level.The optimum temperature of urease is 60℃.
出处
《西北农业大学学报》
CSCD
北大核心
1998年第5期15-19,共5页
Journal of Northwest Sci-Tech University of Agriculture and Forestry（Natural Science Edition)
基金
国家教委博士点基金
关键词
土壤
脲酶活性
陕西
soil urease,urease activity,Shaanxi soil
