Study On The System Of Quality Evaluation Of Cultivated Land Requisition-compensation Balance

Cultivated land requisition-compensation balance is the most effective measure of true total dynamic balance of cultivated land. But in the actual work, the work of total dynamic balance of cultivated land has been staying on the aspect of quantity balance of cultivated land all the time. We should realize the upgrading of total dynamic balance management of cultivated land from quantity balance to quantity - quality balance of quality. It has already become the urgent request of the present society. The cultivated land quality was selected as the research object from many contents which in great need of studying. On the basis of further consideration definition of classification of land of agricultural land and cultivated land requisition-compensation balance, grafting theories and methods between classification of land of agricultural land and cultivated land requisition-compensation balance were studied for using data of classification of land of agricultural land in the cultivated land quality calculation and promoting the upgrading of total dynamic balance management of cultivated land from quantity balance to quantity -quality balance of quality.The article analyzed inherent logic relation between classification of land of agricultural land and cultivated land requisition-compensation balance. On the basis of further study of cultivated land requisition-compensation balance, it accounted for the step's relation of cultivated land requisition-compensation balance from quantity balance type, quantity - quality balance type , quantity - quality - ecology balance type and quantity - quality - ecology - humane balance type and pointed out the core of total dynamic balance of cultivated land in our country is in the upgrading period from quantity balance to quantity - quality balance of quality. According to the new requirement of cultivated land requisition-compensation balance in our country, the article constructed the method system of quality evaluation that was the core of element association- standard grain of unit method and proposed calculation method of the equivalent coefficient of cultivated land requisition-compensation balance on the basis of the core of standard grain of unit. Moreover it put forward the principle of factor choose and the method of calculating weight and dividing value.The article took representative Bazhou county of plain district of Hebei Province as an example, launched the research of quality evaluation of cultivated landrequisition-compensation balance, and set up index collection which take organic content, soil texture , soil salinity , guaranteeing rate of irrigate and body type of soil as the leading factors against the actual conditions of this city. Asserted 72 element association, and divided into three land usage equivalence districts , then on the base of the statistical analysis between the natural quality composite index of cultivated land and standard grain of unit, it has verified the feasibility of the method system. Cultivated land was divided four classification of standard grain of unit depended on standard grain of unit in the evaluation area. Moreover, the equivalent coefficient of cultivated land requisition-compensation balance was conversed from which work out the result of classification evaluation of standard grain of unit for BaZhou county's cultivated land: the first- classification cultivated land, 16930.96 hectares, occupied 34.4% of the whole area, distributed mainly in the western loam district and middle part clay area; the second-classification cultivated land, 15109.89 hectares, occupied 30.7% of the whole area, distributed mainly in the middle part clay area; the third-classification cultivated land, 13288.83 hectares, occupied 27.0% of the whole area, distributed mainly in the eastern sand and soil area; four classification cultivated land, 3888.21 hectares, occupied 7.9% of the whole area, distributed mainly in the sand and soil area of west of eastern area.