延川县耕地碎片化研究

Research on Cultivated Land Fragmentation in Yanchuan

【目的】选取延川县为研究区,以延川县2022年土地利用数据为基础,探究延川县耕地碎片化程度与耕地碎片化成因,为延川县耕地利用与保护提供参考依据。【方法】选取地块平均面积、最大斑块、斑块密度和形状指数为耕地碎片化评价指标,利用综合指数法与熵值法确定指标权重并计算综合得分,依据评价结果分析延川县耕地碎片化成因。【结果】①研究区整体耕地碎片化程度偏高,总体呈西高东低态势。②县域内有50%的行政区属于耕地重度碎片化地区,25%行政区属于中度碎片化地区,25%行政区属于轻度碎片化地区。③影响延川县耕地碎片化的自然因素主要为地形地貌及土地肥力,社会经济因素主要为耕地的不充分利用和土地权属的细碎。【结论】可以通过土地整治工程与土地权属调整降低延川县耕地碎片化程度。合理利用耕地资源的同时加强后续监管措施,能够预防耕地碎片化加剧。

[Purposes]Based on the 2022 land use data of Yanchuan county,this study focuses on Yanchuan County as the research area and aims to investigate the extent and causes of cultivated land fragmentation in order to provide guidance for the sustainable utilization and protection of cultivated land.[Methods]The evaluation indices selected for assessing cultivated land fragmentation include average area,maximum patch size,patch density,and shape index.The comprehensive index method and entropy method are employed to determine index weights and calculate comprehensive scores.Based on these results,an analysis is conducted to identify the factors contributing to cultivated land fragmentation in Yanchuan County.[Findings]The findings are as follows:①Cultivated land fragmentation exhibits a higher degree in western areas compared to eastern areas within the study region.②Among all administrative districts in Yanchuan County,50% experience severe levels of fragmented cultivation,while 25% fall into moderate or mild categories respectively.③Natural factors such as topography and soil fertility significantly influence cultivated land fragmentation in Yanchuan County;meanwhile,social-economic factors including underutilization of agricultural resources and fragmented ownership also contribute.[Conclusions]To mitigate cultivated land fragmentation in Yanchuan County,strategies such as implementing land consolidation projects and adjusting ownership patterns should be considered.Additionally,it is crucial to strengthen post-project supervision measures while ensuring rational utilization of agricultural resources so as to prevent further intensification of fragmented cultivation.