Study on Agricultural Eco-Efficiency and Its Influencing Factors in Karst Mountainous Area of Guizhou Province——Comparative Analysis Based on Ecosystem Service Improvement
Based on whether the expected output includes agricultural ecosystem services,this paper makes a comparative analysis of agricul-tural ecological efficiency in Guizhou karst mountain area,in order to provide theoretical reference and data support for promoting the green de-velopment of agriculture in this area.The super-efficiency SBM model and GML index were used to measure the two agricultural eco-efficiency of nine cities and prefectures in Guizhou from 2000 to 2019,and the Tobit regression model was used to explore its influencing factors.The re-sults show that:①The traditional agro-ecological efficiency is only effective in Guiyang.After considering agro-ecosystem services,the average agricultural efficiency of other cities and states enters the effective zone except Liupanshui,Anshun,Qianxi and Qiannan. ②During the study period,the traditional agricultural total factor productivity (GML) of Guizhou increased by 2％ annually,especially the exponential growth of GML after 2012.In addition to Zunyi,Qiandongnan and Tongren,the traditional agricultural total factor productivity (GML) of the other cities and states was greater than 1,and the improvement of agricultural ecological efficiency in each city and state was mainly driven by technological progress.In addition to Zunyi and Tongren,the improved GML index of other cities and states is lower than the traditional one. ③Industrial structure,financial support for agriculture,and agricultural mechanization density were positively correlated with both traditional and improved agroecological efficiency; farmers' income level and fertilizer use intensity were negatively correlated with both traditional and improved agro-ecological efficiency; per capita cultivated land level and vegetation coverage were positively correlated with improved agroecological efficien-cy,but negatively correlated with traditional agroecological efficiency.
Agricultural eco-efficiencyEcosystem servicesInfluencing factorsGuizhou karst mountainous area
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