Analysis on the supplementary potential of cultivated land resources in the county area:taking Banan district of Chongqing city as an example
"In-out balance"is an important institutional innovation for China to further strengthen the control of cultivated land use and adhere to the red line of 1.8 billion mu of cultivated land in the new era.However,in the process of implementing this policy,many problems are gradually discovered by local governments,such as difficulties in selecting project sites,spatial coordination,cultivated land restoration,and management and protection in the later stage of the project.Taking Banan district of Chongqing as an example,this paper comprehensively evaluates the cultivated land supplement potential by means of"in-out balance"from multiple dimensions such as soil fertility,restoration cost,management and protection conditions of later stage and spatial planning coordination,analyzes the main obstacles restricting the conversion of other agricultural land into cultivated land,and optimizes the spatial location of the implementation of"in-out balance"in the future.The results show that the evaluation score of cultivated land supplement potential in the study area is between 36.95 and 95.62,and the spatial difference is significant.High-quality plots are concentrated in the low-hilly areas along the river valley,and the high recovery cost and conflict with the planning boundary are the main limiting factors for the conversion of other agricultural land to cultivated land,it is predicted that in the study area,6223.6 hm2 of cultivated land will need to be supplemented from the"in-out balance"way in 2020-2035.However,due to the obvious spatial mismatch between the loss of cultivated land owing to non-grain conversion and the supplementary resources,the economy and feasibility of implementing the"in-out balance"in the town area are poor,while the overall planning in the county area can achieve the optimal allocation of resources to a greater extent.
cultivated land protectionnon-grain cultivated landin-out balancecultivated land supplement potentialthree-zones and three-lines
NETL
NSTL
万方数据
