【摘要】 根据陕西7种主要土壤19个土样的脲酶活性及理化性质的测定结果，经相关、通径和主成分分析表明：土壤脲酶活性可明显反映出土壤肥力水平的差异，脲酶活性大小受到土壤理化性质直接和间接的影响。用主成分组成的土壤肥力信息系统分析统计和用土壤的脲酶活性及理化性质分别评价土壤肥力所得到的结果相似。更多还原

【Abstract】 The urease achvities and physico-chemical properties of nineteen samples collected from seven main soils in Shaanxi Province were analyzed. The results obtained by the correlation, path and principal component analyses showed that the soil urease activities varied significantly with the soil fertility level and soil physical and chemical properties had both direct and indirect influences on the urease activity. Similar evaluation results of soil fertility were got by using an information system of soil fertility consisting of principal component and by the urease activities and the physical and chemical properties respectively.更多还原