喀斯特山区耕地细碎化与地貌类型的空间关联性--以贵州修文县为例

The correlation research between cultivated land fragmentation and landformin Karst mountainous areas——A case of Xiuwen County,Guizhou Province

了解不同地貌耕地细碎化分异规律,为合理有效利用和整治耕地资源提供参考。以贵州省修文县为研究对象,选取耕作距离指数、地块面积指数和地块形状指数3个指标,测度贵州省修文县不同地貌区耕地细碎化程度,分析耕地细碎化程度与地貌类型的空间关联特征。研究表明:修文县坝子、丘陵和山地均有分布,地貌类型复杂;修文县耕地细碎化综合指数最高值为0.863,最低值0.110,各行政村耕地细碎化程度存在明显差异;耕地细碎化格局受地形地貌影响呈现一定的规律性,山地村的耕地细碎化程度普遍高于丘陵村和坝区村;修文县耕地细碎化综合指数、耕作距离指数、地块面积指数、地块形状指数的Moran′s I指数均大于0,耕地细碎化空间分布具有空间正相关性。针对区域不同地貌类型应采取差别化的细碎耕地整治策略。

This paper aims to understand the differentiating and dividing rules of cultivated land in different landforms,and provide a reference for rational and effective use and remediation of cultivated land resources.Taking Xiuwen County,Guizhou Province as the research object,cultivation distance index,plot area index and plot shape index were selected to measure the degree of cultivated land fragmentation in different landform areas,and analyze the space related features of cultivated land fragmentation and landform types.Studies have shown that:dams,hills and mountains are all distributed in Xiuwen County,and the landform types are complex;the highest value of the comprehensive index of cultivated land fragmentation in Xiuwen County is 0.863 and the lowest value is 0.110.There are obvious differences in the degree of cultivated land fragmentation among administrative villages.The pattern of cultivated land fragmentation shows a certain degree of regularity due to the influence of topography.The degree of cultivated land fragmentation of mountain villages is generally higher than that of hilly villages and dam villages;The Moran's I index of the comprehensive index,cultivated distance index,plot area index,plot shape index in Xiuwen County are all greater than 0,and the spatial distribution of cultivated land fragmentation has a positive spatial correlation.According to the different landform types in the region,a differentiated cultivated land consolidation strategy should be adopted.