摘要
摘要:基本农田红线是土地利用总体规划“三线”划定的重中之重，城市周边永久基本农田的划定是基本农田红线划定工作中的难点。本研究以半岛丘陵区山东省海阳市为例，以“三线”协同划定的思想为切入点，采用生态优先、建设用地严格举证、优质耕地尽量划入永久基本农田和市场配置资源的思路，将生态安全网络构建、建设用地适宜性评价、耕地质量综合评价等多种方法有机结合，并对土地评价和立地分析（LESA）方法进行改进，通过Arcgis空间分析功能，综合划定海阳市城市周边永久基本农田。结果表明：1）生态安全网络中耕地面积为12.11 hm²，优先建设区与重点建设区中已举证的耕地面积为154.99 hm²，此部分耕地均不适宜划入永久基本农田。2）根据耕地综合质量分值将耕地划分为4个等级，其中，优先划入型和适宜划入型耕地，自然质量和立地条件均比较优越，可划定为永久基本农田，重点调控型和后备资源型耕地则不宜划入；其中优先划入型耕地面积为458.05 hm²，将其中427.82 hm²划入永久基本农田，适宜划入型耕地面积为771.83 hm²，将其中500.67 hm²划入永久基本农田。3）划定后城市周边永久基本农田面积1 305.22 hm²，新划入永久基本农田的耕地面积为928.49 hm²，占城市周边耕地总面积的60.26%，永久基本农田保护率提高了42.66%，永久基本农田中耕地的国家利用等平均值（9.04）高于全市耕地平均利用等别（9.56），且坡度均低于15°。4）城市周边生态安全用地、永久基本农田、建设用地空间布局更加优化，有利于城市的有序发展和土地的可持续利用。本研究采用基于改进的LESA评价方法，并综合考虑生态安全用地、永久基本农田和建设用地的空间布局，丰富了永久基本农田划定方法，达到了海阳市城市周边永久基本农田划定目标；同时研究结果具有较强的实用性，为海阳市永久基本农田的保护和土地利用总体规划“三线”划定工作提供了科学依据。
关键词:半岛丘陵区/
城市周边/
永久基本农田/
生态安全网络/
建设用地适宜性/
耕地自然质量/
LESA体系/
“三线”协同
Abstract:The red lines of prime farmlands constitute the top priority of the "Tri-Line" demarcation of general land use planning. The demarcation of permanent prime farmlands in city periphery has been of great significance for controlling city unlimited sprawl, stabilizing farmland area and ensuring food security of the country. Using Haiyang City in Shandong Province as a case study, this study developed a land planning strategy for the study area based on the "Tri-Line"-coordinating demarcation process. The study adopted procedures of ecological priority, strict construction land evidence, positive demarcation of high-quality cultivated land and market resources allocation to integrate ecological safety network, suitable evaluation of construction land and comprehensive evaluation of cultivated land to demarcate the permanent prime farmland in the study area. To comprehensively evaluate the cultivated land quality, the land evaluation and site assessment (LESA) method was improved, and ArcGIS was used to analyze spatial distribution of cultivated land patch. The results showed that the area of cultivated lands in ecological safety network was 12.11 hm², and those in the priority construction region and important construction region was 154.99 hm², both were not suitable for permanent prime farmland. The cultivated land in the city periphery was divided into 4 grades based on comprehensive quality scores. The priority area and suitable area were designated as permanent prime farmland, where the natural quality and site condition were superior. Then the controlled area and reserved area were not included in this division. About 458.05 hm²land was in the priority region, of which 427.82 hm² of the cultivated land was classified as permanent prime farmland. About 771.83 hm² land was classified as suitable area, of which 500.67 hm² was permanent prime farmland. After demarcation, the area of permanent prime farmland around Haiyang City was 1 305.22 hm², of which newly cultivated land formed 928.49 hm², accounting for 60.26% of the total cultivated land around the city. Overall, permanent prime farmland protection rate increased by 42.66%. The average use index of cultivated land in permanent prime farmland (9.04) was higher than that of cultivated land in the whole city (9.56), and the slope of the permanent prime farmland was less than 15°. 4) The layout of ecological security land, permanent prime farmland and construction land around the city was more optimized in favor of the orderly development of the city and the sustainable use of the land. In summary, based on the improved LESA evaluation method and comprehensive consideration of layout space of ecological security land, permanent prime farmland and construction land, the study enriched the demarcation method of permanent prime farmlands and achieved permanent prime farmland demarcation in Haiyang City. At the same time, the results of the study were practicable and provided the scientific basis for the protection of permanent prime farmlands and the application of "Tri-Line" demarcation in general land use planning.
Key words:Peninsula hill area/
City periphery/
Permanent prime farmland/
Ecological safety network/
Construction land suitability/
Cultivated land natural quality/
LESA system/
"Tri-Line" coordination



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