基于地理探测器的中国中部城市土地绿色利用效率时空演变及影响因素研究

Analysis of Spatial-temporal Evolution and Influencing Factors of Green Land Use Efficiency in Central China based on Geographic Detector

中部崛起战略后,中国中部六省(湖北省、湖南省、安徽省、山西省、江西省和河南省)经济快速发展,建成区面积不断扩张,不仅威胁粮食安全,更加剧资源环境约束。在此背景下,本文采用2007—2018年中部六省80个地级市面板数据,并运用Malmquist-Luerberger指数、重心模型、空间计量模型和地理探测器模型分析中部六省80个地级市土地绿色利用效率时演变、重心移动轨迹变化及其影响因素情况。结果表明:①2007—2018年中部六省土地绿色利用效率增长是靠技术进步"单轨驱动"的。②城市土地绿色利用效率值表现出明显的空间分异特征,且重心总体向东北方向移动。③中部六省各地级市之间土地绿色利用效率存在空间依赖性和空间溢出效应。④除城市建设用地面积外,城镇化率、产业结构高级化水平、经济发展水平、外商直接投资额均正向影响中部六省80个地级市土地绿色利用效率。其中,各个影响因素对土地绿色利用效率的影响从强到弱依次为产业结构高级化水平、外商直接投资额、建设用地面积、城镇化率、经济发展水平。

After the Chinese government put forward the Rise of Central China Plan,it rapidly facilitates the economy development of Henan province,Hubei province,Hunan province,Jiangxi province,Anhui province and Shanxi province which has gradually become the fourth growth pole driving national economic growth,has caused the built-up area to expand and arable land to decrease,which not only threaten food security,but also impose resource and environmental constraints.In the context,based on the panel data of 80 prefecture-level cities in six provinces of central China from 2007 to 2018,this paper analyzes the green-efficiency of land use and its evolution,the trajectory of gravity center change,influencing factors of green-efficiency of land use and its influence degree applying Malmquist-Luerberger index,gravity center model,spatial econometric regression model and geographical detector model.The results show that①the green-efficiency of land use and technological progress in the six provinces of central China from 2007 to 2018 fluctuated frequently and their change pace was basically the same,while the technological efficiency was relatively stable,indicating the greenefficiency of land use was"single-track"driven by technological progress.②The green-efficiency of urban land use showed obvious spatial differentiation characteristics,and the center of gravity generally moved to the northeast part of Central China.③It showed spatial dependence and spatial spillover effects on the greenefficiency of land use at the provincial level and prefecture level,the green-efficiency of land use among the prefecture-level cities is mainly in the high-high and low-low level.④In addition to the area of urban construction land,urbanization rate,the advanced level of industrial structure,the level of economic development,and the amount of foreign direct investment all positively affect the green-efficiency of land use in 80 prefecturelevel cities of six central provinces.Among them,the influence degree of various factors on the green-efficiency of land use from strong to weak,in order,is the advanced level of industrial structure,the amount of foreign direct investment,the area of urban construction land,the urbanization rate and the level of economic development.