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基于形态-结构-功能多维评价体系的耕地保护分区研究

Protection Zoning of Cultivated Land Based on Form-Structure-Function Multidimensional Evaluation System

  • 摘要: 耕地保护分区是科学实施耕地保护措施和引导耕地可持续利用的重要依据。以晋中市为研究区域,从耕地形态、耕地结构和利用功能3个维度构建耕地保护分区评价指标,并在三维特征耦合分析基础上,将耕地保护区划分为4种类型。结果表明:耕地形态受地形地貌影响,聚集型斑块主要分布在汾河沟谷和黄土堆积地貌区,散布型耕地斑块分布在剥蚀构造和剥蚀侵蚀地貌区;耕地质量在空间上呈现弱的正相关性,集聚类型以HH和LL为主,累计面积占比为60.19%,HL和LH型零星分布在全区域;功能协调区域主要分布在晋中市西部,其耕地综合利用潜力较大,功能不协调区主要表现为生态功能高于生产、经济功能或经济功能高于生态、生产功能两种情况;根据耕地形态、耕地结构和利用功能等三维耦合分类,将晋中市耕地保护区分为永久农田建设区、土地整治潜力区、农业结构调整区和生态修复退耕区,其中永久农田建设区面积占比最大,为48.79%。

     

    Abstract: The protection zoning of cultivated land resources is an important basis for scientific implementation of cultivated land protection and guiding the sustainable utilization of cultivated land.Taking Jinzhong City as the study area, the evaluation indexes for cultivated land partition were constructed from the three dimensions of cultivated land form,spatial structure and cultivated land function. On the basis of three dimensional feature coupling analysis,the cultivated land protection area of Jinzhong City was divided into four types. The results showed that the cultivated land form was under the influence of geomorphology. The aggregation patches were mainly distributed in the Fen River valley and the loess accumulation geomorphologic area,while the diffuse patches were distributed in the denudation tectonic and the denudation erosion geomorphologic areas. There was a weak positive spatial correlation among the quality of cultivated land in Jinzhong City,in which the HH and LL aggregation types were main types. The HL and LH types were scattered in various regions. The functional coordination area were mainly distributed in the western Jinzhong City,with great potential for comprehensive utilization of cultivated land,while the functional incoordination area involved four counties. The incoordination was featured by two conditions of either the ecological function was higher than the productive and economic functions or the economic function was higher than the ecological and productive functions. According to the three-dimensional coupling classification of form,structure and function,the cultivated land protection area of Jinzhong City was divided into permanent cultivated land construction area,potentiality of land consolidation area,agricultural structure adjustment area and ecological de-farming area. The permanent cultivated land construction area was the main agricultural production area of Jinzhong City.

     

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