Relationship between Soil Enzyme Activities and Fertility Factors from Rosa sterilis S.D.Shi Planting Bases Located in Karst Mountain Region
Soil enzymes are significant composition that is closely related to soil fertility factors.And the root-soil of planting bases with different ages of Rosa sterilis S.D.Shi was selected to study the relationship between the soil enzyme activities and fertility factors in karst mountainous region of Guizhou Province,China.Fertility factors were also discussed since these have an impact on the effect level and mechanism of soil enzyme activities.The results show that the soil enzyme activities and fertility factors increased with a rise in planting age.Moreover,these selected enzyme activities are significantly correlated to several fertility factors and can assess soil fertility as a biological indicator.Path analysis and determination coefficients showed that the soil total nitrogen and available potassium have positive effects on the activity of catalase.Available potassium,hydrolysable nitrogen and organic matter are the major factors for the activity of invertase,while hydrolysable nitrogen,available potassium and water content are the main factors for the activity of urease.To sum up,the plantation of these fruit trees are beneficial for the vegetation recovery and the improvement of soil fertility in this region,which can be used as the first choice of economic crops for ecological rehabilitation.The lack of available potassium may be a key influencing factor for the three enzyme activities from these planting bases.In addition,the results obtained from the path analysis are generally identical with those from canonical correlation analysis and linear regression analysis.
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NSTL
万方数据
维普
