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ZHOU Kaichun, LI Chaomin, ZHU Lili, CHEN Junzhu, XIE Binggeng
This study aims to accurately identify the spatial differentiation characteristics,migration trends, and driving factors of non-grain cultivated land(NGCL)in the Wuling Mountainous area,which is of great significance for the governance of NGCL.Using spatial autocorrelation,gravity center migration,and spatiotemporal geographically weighted regression(GTWR),we analyzed the spatiotemporal patterns and driving factors of NGCL in the Wuling Mountainous area from 2000 to 2020.Results are as follows.(1)In terms of quantity,the average NGCL rate rose from 33.82% to 47.74% ,with the NGCL area expanding from 1.84 to 2.35km2.The number of counties with high or severe NGCL increased from 8 to 40.(2)In terms of spatiotemporal distribution characteristics,the NGCL rate was high in the central-southern regions and low in the northern regions,with a weakening spa tial clustering trend;whereas the NGCL area showed a spatial distribution pattern of low in the central-southern regions but high in the eastwest and northern regions,with a strengthened spatial clustering trend.The gravity center of NGCL shifted overall to the northwest.(3)Rural per capita income and average plot size were the core driving factors of NGCL.The driving influence of natural factors(such as elevation,slope,and precipitation)on NGCL declined,while the driving effects of aging,land productivity,rural population,and income relatively increased.The level of NGCL in the Wuling Mountainous area rose markedly over the studied period,with significant spatial differentiation characteristics.The western and northern mountainous high-altitude areas contributed more prominently to the increase in non-grainization levels,while socio-economic factors such as economic returns and labor conditions became more influential in NGCL.