The Correlation between Soil Characteristics and Environmental Factors along Altitude Gradient of Jiaozi Mountain Nature Reserve
Based on the topography attributes,two transects along altitude gradient were set,which are located at eastern and western of Jiaozi Mountain Nature Reserve.In addition,18 variables of soil physicochemical characters,topography,and vegetation,were selected.the relation between Nature Reserve soil physicochemical property and the topography has been addressed by using principal components analysis (PCA),cluster analysis,and typical relevance analysis.The results indicated that topography has strongly effects on the soil physicochemical characters,especially elevation is the most important affecting factor on the soil organic mater,total nitrogen,available nitrogen,pH and soil depth and so on.Slope and aspect have stronger effects on the soil texture.However,there is not significant correlations between vegetation and soil attributes.Moreover,the soil physicochemical attributes were varied along altitude gradient.Above altitude 3 700 m,the soil organic mater and total Nitrogen were the highest,pH value was the lowest,the soil depth was the smallest,and the content of gravel is the highest.Between 3 000 m and 3 700 m,the soil organic mater and total Nitrogen were lower,pH was higher,the soil depth was largest.Below 3 000 m,soil degradation was dramatic,the soil organic mater and total Nitrogen were the lowest,pH was the highest,the soil depth was large,and the contents of gravel and sand were high.
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NSTL
万方数据
维普
