Designation Of The Capital Farmland Based On LESA Model

Capital farmland is to protect the quality of China’s farmland and delineate important space, and capital farmland is the important guarantee of stable grain production capacity. Our country delimit is capital farmland concept is gradually from the simple attention number, a gradual transition to attention both of the quantity and quality. Nevertheless, due to the site conditions of cultivated land relatively little consideration, that delineate the capital farmland is frequently adjusted or destruction, leading to Capital farmland quantity unceasingly reduces, and reduce the quality and the stability is poor, these phenomena are on the cultivated land protection policy violates, affecting not only the authority of general land use planning, also exacerbated the problems of food security. Therefore, this article on how to solve the more reasonable delimit is basic farm the research on this problem, the farmland quality and site condition of coupling, to construct the LESA model for comprehensive evaluation of farmland, and the basis for delimit is basic farm, both to ensure basic farm has the quality characteristics, and protection of Capital farmland to be able to provide long-term stability of the production of space.This paper studies showed that,(1) LES A model can effectively the quality evaluation and site assessment combines, make basic farm delimit the more scientific and reasonable;(2) the classification results of agricultural land can be very good for quantitative characterization of cultivated land quality, at the same time, through the establishment of city expansion condition, farmland is connected piece contains conditions, the effects of natural disasters, agricultural structural adjustment effects of site condition system can be effectively conducted site evaluation of cultivated land;(3) to Qianjiang city as a case, that of site conditions on basic farm delimit plays an important role;(4) LESA model delimit basic farm method in practical application and has good popularization value.