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快速城镇化过程中,耕地面临日益严重的质量和数量安全问题,改进耕地质量评价方法并探索其在城市开发边界划定中的应用研究,对于耕地和农产品质量安全保护、“多规合一”的实施具有重要意义。通过融合农用地自然质量分等和多目标地球化学调查成果,重构耕地质量评价指标体系与集成方法,结合耕地质量与规划城镇用地的耦合分析,探索可占用耕地与城市开发边界识别路径,并以南通为例进行验证。研究表明:沿江地区土壤重金属含量较高,沿海地区土壤肥力较差,西部和北部地区土壤肥沃,耕地质量较好。沿江地区规划城镇用地和耕地质量空间匹配较好,可占耕地和开发边界范围较大,北部地区相反。耕地质量评价—耕地与规划城镇用地耦合—可占用耕地选择与边界框定的方法,可以为城市开发边界划定提供指引,但城市用地需求和耕地可占用规模确定是有待深入研究的问题。
In the process of rapid urbanization, cultivated land is facing increasingly serious quality and quantity safety problems, improving the evaluation methods of cultivated land quality and exploring the application research on the demarcation of urban development boundaries. As for the quality and safety protection of cultivated land and agricultural products, "The implementation of great significance. By integrating the natural quality of agricultural land and multi-objective geochemical survey results, reconstructing the index system and integrated method of cultivated land quality evaluation, and combining the analysis of cultivated land quality with the planning of urban land use, this paper explores the boundary identification path between cultivated land and urban development. Nantong as an example to verify. The results show that the content of heavy metals in the soil along the Yangtze River is higher, the soil fertility in the coastal areas is poorer, the soil in the western and northern parts is fertile, and the cultivated land quality is better. The spatial distribution of urban land and cultivated land quality in the planned area along the Yangtze River is relatively good, covering a large area of cultivated land and development boundary, and the opposite in the northern area. Cultivated land quality evaluation - Coupling cultivated land with urban land use planning - Arable land selection and bounding box method may provide guidelines for urban boundary demarcation. However, urban land demand and cultivated land occupancy scale determination are issues to be further studied.