Preliminary Studies on Improvement Effect of Interplantation Different Trees in Chinese-fir Forest on Soil Physical and Chemical Properties

In order to explore the early soil improvement effect of planting different trees in Chinese-fir forest,the soil physical and chemical properties of different trees of root zone were studied in the western Zhejiang Province.The results showed that the soil physical construction and nutrient conditions under young mixed forests were improved to some content.Then the laws of soil nutrient content of the different interplanting models were evaluated by multi-factor principal component,and the comprehensive advantages of various characteristics of soil nutrients were sorted.The improvement effect of 12 species planting in Chinese fir forest in ChengGuan forest farm were compared by principal component analysis,Quercus acutissima Carruth,Photinia davidsoniae Rehd.et Wils,Nandina domestica,Taxus chinensis,Taxus chinensis,Photinia davidsoniae Rehd.et Wils and Distylium racemosum Sieb.et Zucc significantly improved the soil nutrient conditions than other trees.Then the improvement effect of Quercus acutissima Carruth and Photinia davidsoniae Rehd.et Wils were the best.