阜平县耕地质量时空演变分析

土地资源是人类社会持续发展的要素支撑,耕地资源作为土地资源的精华,其质量变化将显著影响粮食安全、社会稳定。基于阜平县耕地质量等别评价成果,使用耕地质量综合指数和等别模型、ArcGIS空间分析工具研究阜平县耕地质量变化。结果表明；时间上,阜平县耕地数量呈增长趋势,等别构成稳定。耕地变化集中在自然等10等、利用等9等和经济等10等上,耕地整体质量向好但经济利用水平有待提升。空间上,阜平县耕地等别空间分布与地势变化高度契合,破碎化程度高,耕地空间整体由西北向东南移动。高等地、中等地主要分布在东南一侧,低等地分布在西北地区；减少耕地分布较为分散,东部地区减少耕地比西部地区数量较多,新增耕地相对集中在东南部。

Temporal and Spatial Evolution Analysis of Cultivated Land Quality in Fuping County

Land resource is the support of sustainable development of human society. Cultivated land resource is the essence of land resource, and its quality change will significantly affect food security and social stability.Based on the results of cultivated land quality grade evaluation in Fuping County, the cultivated land quality change in Fuping County was studied by using cultivated land quality comprehensive index and grade model and ArcGIS spatial analysis tool.The results showed that the number of cultivated land in Fuping County was increasing in time, and the grade was stable.The change of cultivated land is concentrated on natural grade 10, utilization grade 9 and economic grade 10. The overall quality of cultivated land is good but the level of economic utilization needs to be improved.Spatially, the spatial distribution of cultivated land in Fuping County is highly consistent with the change of terrain, with high degree of fragmentation, and the whole cultivated land moves from northwest to southeast.The high-level and medium-level land is mainly distributed on the southeast side, and the low-level land is distributed in the northwest; the reduced cultivated land is more distributed in the east than in the west, and the new cultivated land is relatively concentrated in the southeast.