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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℃．
Under different temperature and substrate concentration, the activity of 19 soil urease samples from 7 soils in Shaanxi Province was determined. The results showed that the urease activity increased with the increase of temperature and substrate concentration at a certain temperature and substrate concentration range. In different temperature and concentration sections, the influence range was significantly different. In addition to paddy soil, the other high-fertility soil samples In the same ecological zone, the urease activity has a very significant and positive correlation with physicochemical properties, soil urease activity can be used as one of the important indicators of soil fertility level; the optimum temperature of soil urease action is 60 ℃ .