Cultivated Land Reserve Resources Potential Evaluation And Its Utilization Of Longjiang County

As the material basis of human survival and development, land provide important support for the development of social economy. However, with the development of economy and the increase of population, land resources demand continues to increase, as the fundamental realities of our country, the large population with relatively little land means that rational land use. A large number of high quality cultivated land resource had been used during the process of urbanizatio n, and the farmland quality gradually decline. As an important source of cultivated land reserving resources, cultivated land reserve resources Is the important path to the regional cultivated land dynamic equilibrium, alleviate food security, protect the ecological environment. For scientific and reasonable evaluation on the potential cultivated land reserve resources and the development and utilization, can provide an important support to protect cultivated land and grain production capacity, ensure regional food security, protection ecological environment and the sustainable use of land resources.Reserve cultivated land resources potential evaluation and exploitation refers to calculation comprehensive potential score with the natural conditions of reserve cultivated land resources, land use characteristics, the ecological environment influence factors, put forward suitable way of reserve cultivated land resources development and utilization according to the characteristics of different regions. First, grasp the evaluation and the research progress of reserve cultivated land reserve resources, land reclamation and protection of arable land and the concept of sustainable land use, based on the scarcity theory, sustainable development theory, human relation s theory, ecological economic theory, landscape ecology theory and regional theory, choose Longjiang county as study area, which is in the western of Songnen plain, build the evaluation index system, including natural condition, social condition, ecologica l conditions three aspects, potential the evaluation of cultivated land reserve resources and potential for three level: high potential, medium, and low potential. Based on the results, partition to the cultivated land reserve resources, suggest for different development and utilization types of reserve cultivated land resources. The main contents and results are as follows:(1) Reserve cultivated land resources potential evaluation index system. as the goal of cultivated land "divination balance" and the ecological environment protection, select effective soil layer thickness, organic content, p H value, backup resource type, slope and distance from water from the natural conditions aspects, select the transportation is convenient, drainage condition, figure spot area of three indicators from the degree of social conditions, select the forest coverage, ecological fragile degree and soil erosion modulus index from the ecological conditions, construction of reserve cultivated land resources potential evaluation index system.(2) Evaluation of cultivated land reserve resources. Consider the regional ecological environmental conditions. Use the limiting factor method and the GIS space analysis to screening the cultivated land reserve resources data. Determine the type, quantity and distribution of cultivated land reserve resources. Using multi-factor comprehensive evaluation index model of cultivated land reserve resources comprehensive evaluation score, result evaluation score is between 4.2644 ~ 8.7599. Using Arc GIS spatial analysis function, combining the reality of regional characteristics, divided cultivated land reserve resources into high, medium and low three potential level. High potential backup resources for 5 655.06 hectares, accounting for the county 18.57% of reserve cultivated land resources, the main type include grassland, saline-alkali land, bare land, mining land, sand, distributed in mountain spring town, king star town, longxing town and so on; Potential of backup resources for 10 762.59 hectares, accounting for 35.34%, the main type include grassland, saline-alkali land, bare land, mining land, sand, mainly distributed in mountain spring town, king star town, longxing town; Low potential backup resource covers an area of 0.3739 hectares, accounting for 46.09%, the main type include grassland, saline-alkali land, bare land, land for mining, mainly distributed in longxing town, township, black hills, mountain spring town.(3) The development and utilization partition of cultivated land reserve resources. With the method of fuzzy clustering analysis, Clustering variables include cultivated land reserve resources potential evaluation, the degree of reserve cultivated land resources concentrated, potential yield degree of reserve cultivated land resources. The cultivated land reserve resources could divided into the important development utilization area and the conditional exploitation area. Combined with the feature of different types of reserve cultivated land resources in the area domain constraints conditions of natural resources, ecological environment, district of reserve cultivated land resources development and utilization are also presented. For the important development and utilization area, the area is 8 398.74 hectares, accounting for 27.58% of the total area, the regional cultivated land development overall condition is good, the main limiting factor long-term extensive cultivation, slope cultivation, cultivated land quality, as a result of overgrazing degeneration and land desertification. In this condition, we should construction the farmland protection forest, the sand-fixation forest, cooperate with water conservancy engineering measures, construct the farmland infrastructure. For the conditional exploitation area, the area is 22 056.30 hectares, accounting for 72.42%, the future development should be possible to ecological environment in the process of a detailed environmental impact assessment of the impact of the report, strengthen the construction of agricultural infrastructure and land management work.Research of cultivated land reserve resources potential evaluation and the development and utilization of Longjiang county, could effective increase the quantity of cultivated land, Keep cultivated land dynamic balance, guarantee for food security, ecological environment protection of the region, has the important guidance to promoting social and economic sustainable development has the important guidance.