粮食安全视角下的土地资源优化配置及其关键问题

The optimal allocation of land resources is an important means to improve land use efficiency, alleviate land use conflicts, and promote harmonious man-land development. Current research on the optimal allocation of land resources in China has made great progress in theoretical exploration and practical applications. However, in the face of rapid land use changes, inefficient land management, and ecosystem degradation, the traditional optimal allocation way based on "quantity-spatial coupling" has been unable to meet the current needs in pursuit of a better life and sustainable development goals. Meanwhile, global food security is facing a series of severe challenges. The optimal allocation of land resources will directly affect and act on the coordination process between food production and economic development conflicts. Since the reform and opening up in the late 1970s, to serve the national strategic needs and key areas development (Yangtze River Delta and coastal areas), Nanjing University has carried out much research and practice around land resources optimization, so as to achieve the goal of ensuring resource security and food security. Researchers have focused on farmland pattern optimization, farmland intensification transition, farmland protection and planning, land use and urban-rural planning, land consolidation and agricultural land management, land use system innovation, land economic policy optimization and other characteristic research fields. Research directions take advantages of interdisciplinary deveoplment of geography and management, and have made contributions to disciplinary development and institutional innovations in the optimization and sustainable use of national land resources. In brief, this paper summarizes the key issues on China's land resource allocation by systematically combing the research progress related to the optimization allocation of land resources. Furthermore, on the basis of reviewing the academic contributions of Nanjing University, the opportunities and challenges faced by the optimal allocation of land and resources in China from the perspective of food security are summarized. The research can provide references for sustainable land use optimization.

Keywords： food security; land resources; optimal allocation; research progress; Nanjing University