长株潭都市圈耕地多功能转型时空格局与协同优化路径OACHSSCD

Under the dual context of urbanization and ecological civilization construction,research on cultivated land multifunctional transformation is important for coordinating urban-rural development and ensuring food security.This study takes the Changsha-Zhuzhou-Xiangtan urban agglomeration(Changsha-Zhuzhou-Xiangtan metropolitan area)as its research area.A multifunctional e-valuation system encompassing"production-social security-economic contribution-ecological maintenance"functions was construc-ted.The CRITIC-entropy weight method and the Tobit regression model were employed to reveal the spatiotemporal evolution charac-teristics of cultivated land multifunctionality(CLMF)and its driving mechanisms.Subsequently,the Net Resource Competitive Advan-tage(NRCA)model was utilized to identify the dominant functions of cultivated land,and coordinated optimization pathways for CLMF development were proposed.The results indicated that:① The CLMF in the Changsha-Zhuzhou-Xiangtan metropolitan area region exhibited a transformation trend characterized by"weakening production function alongside strengthening ecological function".The agri-cultural production function index declined continuously,with its spatial pattern shifting from"high periphery,low center"to"mono-centric shrinkage".The ecological maintenance function underwent a"V-shaped"recovery.Both the social security and economic contribution functions experienced continuous declines,while their spatial differentiation significantly diminished.② The urbanization rate and the proportion of secondary and tertiary industries exerted continuous inhibitory effects on the production and ecological func-tions.Agricultural production function strengthened with increasing distance from the urban centers,exhibiting a positive correlation(coefficient:0.014 in 2000;0.003 in 2020).Conversely,economic development(GDP per capita)accelerated the degradation of the social security function(coefficient:-0.578 in 2000;-0.613 in 2020).③ To achieve the goals of multifunctional utilization and spatial value enhancement,the region was categorized into six functional zones:urban-agricultural sightseeing,leisure agriculture pr-oduction,modern agricultural demonstration,specialty agricultural development,ecological-agricultural conservation,and multifunction-al comprehensive development.