A Study On Supplement Farmland Grade Evaluation Of Coastal Plain In Hebei Province

In order to increase effective cultivated land and guarantee grain security, at present the balance system of requisition-compensation of cultivated land is implementing in china. The balance system of requisition-compensation of cultivated land is a basic system of Chinese land management. Its making is based on special land situation of China. And great achievements have been made after implementation of this system, but many problems also been met. Quality balance is one of the most difficult and awaiting solved problem. In order to realize quality balance, study on grade evaluation of supplement cultivated land is in. Not only the study can supply scientific basis for optimum design of land development and consolidation project, but also is beneficial to reasonable utilization of land resources, better improvement of land quality, agricultural production condition and ecological environment, improvement of supplement cultivated land grade, and insurance of grain production.This paper was under guidance of theory of Sustainable Development, System Theory, Regional Distribution System, and taken the Conception of economical and reasonable and technical feasibility as the principle. Through analyzing the relation between the cultivated land Grading and quality evaluation of supplement cultivated land, applied the method and result of the cultivated land Grading to the grade evaluation of supplement cultivated land. The coastal plain of Hebei is used to be empirical research based on exploitable reserve resources of cultivated land as main research object. The following conclusions can be drawn from the study. The supplement cultivated land grade evaluation system has been established by using the method and result of cultivated land grading for reference. Coastal Plain, Hebei divided into the Coastal Plain area, Jidong Hebei, and the Coastal Plain area, yundong Hebei. The six indicators of supplement cultivated land grade evaluation have been determined as organic matter, irrigation guarantee rate, drainage condition, soil Stalinizations degrees, surface soil and soil body configuration. In accordance with the order of Hebei Agricultural Land Grading, the index score and weight system has been established. The database of exploitable reserve resources of cultivated land of coastal plain has been established by using of spatial analysis of MAPGIS software, and with supplementary investigation. The analysis has showed that there are 51 kinds of factors combination type in Jidong Coastal Plain area and 27 kinds in Yundong Coastal Plain area, which is to exploitable reserve resources of cultivated land of Hebei Coastal Plain. The natural factors condition and restrictive factors in development have been judged out intuitively and quantitatively by factors combination. Development should be at a reasonable level in accordance with the appropriate timing for development, guiding the project site. Factors score of supplement farmland in different indicators areas have been determined on the basis of analysis in the quality of cultivated land reserve resources, and factor combination of supplement land has been produced. There are 41 kinds of factor combination in Jidong Coastal Plain area and 48 kinds in Yundong Coastal Plain area. The final calculation of the coastal plain area of Hebei Province have obtained that the natural degree of supplement farmland is 8-14. The table and the mapping of the distribution of natural degrees have also been obtained.