Study On Land Use Planning And Distribution In Karst Mountain Area Based On Soil Resources Division

The transversion of forming the karst soil is extremely slow, Which formed the characteristics of a high degree of bare rock in karst region, and the distribution characteristics of soil resources is not uniform, not contiguous.It involves the restoration and sound development of the ecological environment in Karst, and further affects the feasibility of the social sustainable development.The Karst landform area in Southwest China is one of the three major carbonate rock areas in the world, where the poverty population is relatively concentrated and the contradiction between people and land is very prominent. Therefore, the task of soil resources protection and rational utilization of land in Karst landform area is urgently placed in front of us.The karst soil resource partitioning and reasonable arrangement of land use,is an approach to protect the soil resources,to improve the ecological environment of karst mountain area, and to concert the relationship between people and land in karst mountain area. Thesis discusses the connotation of karst soil resource partition. The karst mountain area is divided into soil contiguous area and soil scattered area, based on the contiguous partition, then divided :soil high quality area, middle quality area and low quality area, and explore the method to divide.On the basis of soil resources zoning, find the way of land use planning and layout,promote the coordination of land use and soil resources conservation. Soil contiguous areas focuse on agricultural production and urban construction of the layout of the area, soil scattered area is given priority to the protection of the ecological zones.Based on the theoretical study of soil resources zoning in karst mountain area,with the world’s most typical Karst landform of Guangxi Dahua Yao Autonomous County as an example to carry on the empirical research.Base on county reality and according to the method of karst soil resource partitioning, Dahua County Soil resource partition are divided into: soil contiguous area-high quality zone, soil contiguous area-middle quality zone, soil contiguous area-low quality zone, soilscattered-high quality zone, soil scattered area-middle quality zone, soil scattered-low quality zone. Considering the current situation of land use in different soil resources area, the land use direction and control measures are proposed.Dahua County soil contiguous area is the main area of the county agricultural production, and the urbanization development concentration area, where has important meaning to the social development of the large county. The ecological system of soil scattered area is extremely fragile and sensitive, and the environmental carrying capacity is very low, so the ecological protection task of this area is extremely important. Depending on the different importance points of two partitions, respectively, planning the layout of two regional land use can not only avoid urbanization cause negative effects on the ecological environment of the region, but also a way to pursue of sustainable development and harmonious land use. Dahua County Soil contiguous area of ecological area layout in where soil quality is poor, and there are signs of regional land degradation. To production areas,agricultural production areas is mainly, it across large parts of the contiguous area. Dahua town has the largest demand for living areas of the township, is an important area of regional urbanization development. About soil scattered area, ecological areas are the main land for planning and land use, which is the main support for the ecological environment of the ecological environment.The main selection of soil high quality area is the main selection of the soil high quality area, and the living area is mainly based on the current situation of urban and rural construction land, and the new construction land is less.