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《Journal of Southwest Agricultural University》 1995-01
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STUDIES ON RELATIONSHIP BETWEEN UREASE ACTIVITY AND SOIL NUTRIENT FACTORS IN PURPLE SOIL

Liao Tiejun; Huang Yun (Resource and Enviroment College, Southwest Agric. Univ. , Chongqing 630716)  
In neutral purple soil, the urease activity had a direct bearing on the total N, total K, available N and available K, their mathematical model was T=- 0. 2976 + 0. 2353X1+ 0. 1153×10-1 X3 + 0. 2113 X 10~2 X4 - 0. 2068×10-2X6. The urease activity was influenced by many nutrient factors. The path coefficient analysis showed that the effect of total N content on urease activity was largest, while indirect effect of available N was higher than its direct effect. The total K also had positive direct effect on urease activity, but total K and available K had negative indirect effect because of the various N factors; and available K had negative direct effect. These data and their relationship would be useful to the regulating and controlling soil enzyme activity.
【CateGory Index】: S155.25
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