Principal Component Analysis and Cluster Analysis of Soil Nutrients for Planting Schisandra chinensis(Turcz) Baoll in Yanbian Area

[Objective] The aim was to study on the soil nutrient index of Schisandra chinensis (Turcz) Baoll planting base in Yanbian area, so as to provide basis for its scientific fertilization. [Method] Twelve nutrient indeices of 20 soil samples from the planting base in Yanbian area were determined. Through the principal component analysis on these twelve nutrient indices, six main indices, including total N, total P, organic matter, available P, total K and total Ca, were studied by cluster analysis. [Result] The planting soil of S. chinensis in Yanbian could be classified into three types. There were 4 samples in the first type, 6 in the second, and 10 in the third. And 50% of the soil samples were classified into the first type. [Conclusion] Soil for planting S. chinensis showed strong acid with high content of available P, as well as relatively high contents of total N, total K, available B, available Mn, available Fe and organic matter. But available Cu content was greatly low in 50% of the soil samples; and Zn was lacked in 10% samples. Thus, a balanced and reasonable fertilization was recommended to increase the fertilizer efficiency.