"双碳"目标下广西石漠化片区耕地绿色利用效率时空分异研究OA北大核心CSTPCD

[Objective]This study aims to analyze the spatiotemporal evolution and driving factors of green utilization efficiency of cultivated land in the stone desertification area in Guangxi under the'dual carbon'target,and to provide a basis for improving the green utilization efficiency of cultivated land,strengthening the ecological protection of cultivated land,and to expand the research boundary and enriche the research connotation of green utilization efficiency of cultivated land.[Methods]The Super-SBM model was used to calculate the green utilization efficiency of cultivated land.The methods such as spatial autocorrelation and geographical detector were used to analyze its spatiotemporal differentiation characteristics and driving factors.[Results](1)The carbon emissions and non-point source pollution from cultivated land in the stone desertification area in Guangxi had been preliminarily controlled,and the average green utilization efficiency of cultivated land had steadily increased from 0.88 in 2009 to 1.04 in 2021.The increase was small,but the efficiency value had reached an effective level.(2)The spatial differentiation of green utilization efficiency of cultivated land in the stone desertification area in Guangxi was relatively stable,maintaining the spatial differentiation characteristics of high in the south and low in the north,but the north-south difference was narrowing.(3)The green utilization efficiency of cultivated land in the stone desertification area in Guangxi had significant positive spatial correlation and showed a strengthening trend.The local spatial pattern was mainly characterized by high-high agglomeration(HH)and low-low agglomeration(LL),with high-value areas agglomerating in the river valley plains in the south and low-value areas contiguous in the plateau-mountain transition zone in the north.(4)The spatiotemporal differentiation of green utilization efficiency of cultivated land in the stone desertification area in Guangxi was jointly driven by natural geographic factors and socio-economic factors.However,the interaction between moderate scale operation and other production factors could better promote cost-effective land use.In the single-factor detection,'per capita cultivated land scale of agricultural practitioners'had always been the most influential factor.In the interaction factor detection,all influential interaction factors included the'per capita cultivated land scale of agricultural practitioners'factor.[Conclusion]The green utilization efficiency of cultivated land in the stone desertification area in Guangxi had increased slightly year by year and had reached the effective level as a whole.Moreover,its spatial distribution had a significant positive spatial correlation and maintained the spatial differentiation characteristics of high level in the south and low level in the north due to the influence of natural geographic factors and socioeconomics factors.