Analysis And Research On The Physical And Chemical Properties Of Limestone Mountain Region Soil And The Vegetation State Of Yunlong Mountain In Xuzhou

This text has made investigations to the physical and chemical properties of soil of area of Yunlong mountain of Xuzhou and the vegetation state at present, through determining the physical and chemical properties of forest land, carry on relevant analysis to soil every factor, the physical and chemical properties of carrying on soil of different vegetation types are compared. The result of study shows:(1).The artificial Arbor-viate now in area of Yunlong mountain of Xuzhou is of simple structure , and it can generally be divided into 3- 4 layers. One layer of average height of arbor is 12m, it is 60.5% to cover degree on average, regard arbor-vitae as the advantage to plant. According to investigating, two kinds of forest of pure forest and mixed forest divide the structural type.(2).The soil is drenched and dissolved the brown soil produced . It is a karst mountain region type. The soil layer of mountain region thin, the gravel content high, the soil glue in weight, neutral - slightly alkaline, the soil of top layer is relatively loose,soil bulk density is low; The soil of ground floor is tight,the soil porosity is small. It is the sandy soil.(3).Analysis indicate relevantly, soil bulk density, organic nitrogen content of soil, soil organic matter , soil phosphorus content and various soil nutrient indexes have higher coefficient correlation, and play an important role in main compositions are analyzed, so under certain condition, can be regarded as the major indicator which appraises soil fertility.(4).Study on species diversity between different kind of ground, in distributing vertically, the species enriches one degree of herbaceous layer >bush layer> arbor layer; Diversified index of species and index of degree of consistency appear on storey of the herbaceous among the forest layer >bush layer> arbor layer, advantage degree of layer of herbaceous is relatively low, the arbor-vitae occupies the obvious advantage position in floor of the arbor.(5). The relation research of arbor-vitae artificial forest species diversified index and soil fertility factor shows: It is extremely prominent and linear and relevant that soil bulk density, the pH, soil phosphorus content and the soil salt content with the species diversity.