重庆丘陵山区耕地非粮化时空变异及驱动类型划分OA北大核心CSTPCD

To clarify the distribution of non-grain arable land in typical hilly areas of southwest China,and to provide targeted control measures,the driving factors and types of cultivated land in the research area of Chongqing are explored based on spatial autocorrelation,geographic detecting,principal component analysis and K-means clustering.The results show that from 2011 to 2020,the cultivated non-grain land in Chongqing increased from 37.51%to 42.87%,and the number of moderately and highly non-grain counties increased by 14.Non-grain cultivated land showed stronger spatial aggregation,and the high and low concentration areas are mainly distributed in the central urban area.The per capita disposable income gap between urban and rural residents,the urbanization rate,and the distance between districts and counties are the main driving factors of non-grain cultivation,and the interaction between these factors is mainly nonlinear.The relationship between the distance between districts and counties and the gap between urban and rural residents'disposable income provides the strongest explanation for the spatial pattern of non-food distribution.The non-grain driving types in Chongqing can be divided into three categories:agricultural production support,regional economic guidance,and weakening of agricultural production.The zoning results are similar to the planning of"One District and Two Groups"plan in Chongqing.The results of this study provide reference to formulate regional control policies on non-grain cultivated land in Chongqing,as well as to realize sustainable agricultural development and providing reference to understand land use in other mountainous and hilly cities.