Spatial Distribution and Driving Mechanism of Non-Grain Conversion of Cultivated Land in Karst Mountainous Area:A Case Study of Pingtang County
With the land use data of Pingtang County in 2012 and 2022,this study explored the spatial distribution of non-grain conversion of cultivated land and the driving effects of five factors(slope,quality,distance to road,distance to residential area,and distance to water source)of cultivated land on the non-grain conversion.The results were obtained as follows.(1)The cultivated land in Pingtang County,2022 showed an area of 30 946.67 hm2 and a non-grain conversion area of 20 046.68 hm2,with a non-grain conversion rate of 39.31%.The non-grain conversion rate within 5 km of the Five-hundred-meter Aperture Spherical Radio Telescope(FAST)was 63.70%,which was much higher than the average non-grain conversion rate of cultivated land in the county.(2)The areas of grain-producing cultivated land converted into forest land and garden land were 17 080.00 hm2 and 2 826.66 hm2,respectively,both of which accounted for 99.30%of the non-grain conversion area.(3)With the increases in cultivated land slope and distance to road,water source,and residential area and the decrease of cultivated land quality,the non-grain conversion rate of cultivated land rose significantly.The influence weights of the slope,quality,distance to residential area,distance to road,and distance to water source of cultivated land on non-grain conversion were 0.34,0.26,0.17,0.13,and 0.10,respectively.The natural factors with the total influence weight of 0.60 were the main driving factors for the non-grain conversion of cultivated land.
karst mountainous areanon-grain conversion of cultivated landdriving factorPingtang
NETL
NSTL
万方数据
