Soil's Quality And Sustainable Development For Zanthoxylum Bungeanum Forest Land In Rocky Karst Region

In this paper, studying on soil properties of Zanthoxylum Bungeanum forest land with different plantational ages in rocky Karst combined with orientation' s research, and compared them with other land unitilized modes, The results showed:(1) With growth of Zanthoxylum Bungeanum age:The bulk density went down, this indicated that soil' s loosing could promote loss of the surface layer all the more;They were siginificant correlation between the water content and porosity, and they behaved the trendence of increasement after descendence; The change of soil ' s water stabilization aggregate of <0. 25mm was the same as the water content and porosity, the condition would ealily lead to soil and water loss;the grit increasing and the clay decreasing showed ths soil was toward grit, and the granule severily eroded in the soil, it resulted in the weakeness of soil resisting erosion and decreasement of soil' s quality. As a whole, with the grown of Zanthoxylum Bungeanum plantation age, soil' s physical properties of Zanthoxylum Bungeanum' s deteriorated.(2) With growth of Zanthoxylum Bungeanum age: soil' pH value inceased beacause...