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我国城市发展中耕地保护与城市建设、生态建设的冲突现象十分普遍,主要问题在于传统耕地管理“以用定地”,对现有耕地不加区别地划定空间界限、实行统一化的利用标准和管理措施。而人们需要耕地不是需要耕地本身,而是需要耕地为人类所提供的服务,需要回归“以宜定地”的本质进行耕地管理,选择、开发、改造更适宜土地,并将不适宜长期稳定耕作的土地调整为生态用地、建设用地。建议树立基于土地功能并与人类利益所关联的国土空间服务观,并针对我国城市耕地的五大核心服务包括特色农产品生产、特殊生态涵养、科技创新和创意农业、开敞式景观农园、农耕文化传承及城市名片,拓展城市耕地的内涵和范围,加强城市耕地的管理与整治。,The phenomenon of conlfict between arable land protection and urban ecological construction is a very common problem that China faces in the urban development. The main problems include the following. The way of traditional farmland management is “delimiting the land by its use”. It means delimiting the spatial boundaries of existing farmland without distinction; using uniifed utilization standards and management measures. Yet, the farmland need does not mean that people need the land itself. Rather it means people need the services that the farmland provided for them. Therefore, farmland management should be carried out according to the essentials of “delimiting the land by its suitability”. It means choosing, developing and improving more suitable land; transforming the land which is unsuitable for long-term and stable cultivation into ecological land and construction land. On this basis, this paper suggests that we should establish the notion of national spatial service based on land function and human beneifts. In accordance with the ifve core services of urban land in China, we should engage in our efforts to expand the connotation and scope of urban land, and strengthen urban land management and regulation. These ifve core services include characteristic agricultural production, special ecological conservation, science and technology innovative and creative agriculture, open landscape garden, and farming culture heritage and city card.