| Land resources are a limited resource,and one of their characteristics is that their spatial location is relatively fixed.As China’s economic construction continues to advance,the material quality of people’s lives continues to improve and the resulting environmental problems become increasingly prominent.Due to the rapid development of industrialization and urbanization,the scale of China’s urban construction land is expanding,the area of hardened roads continues to increase,the area of productive and ecological land in rural areas is passively shrinking,and the conflict among production space,living space and ecological space intensify.To solve this problem,it is necessary to accelerate the transformation of production methods and continuously optimize the spatial land use pattern to improve the ecological efficiency of land use.Based on the above,this paper constructs an indicator evaluation system for the ecological efficiency of land use under the "three living spaces" and clarifies the specific status of the ecological efficiency of land use in the three subsystems at the national,regional and provincial levels,and explores the factors influencing the ecological efficiency of land use under the "three living spaces".It is important to investigate the factors influencing the ecological efficiency of land use under the "three living spaces",which is important to promote the coordinated development of the region.This paper firstly compares the literature on the basic connotation of the "three living spaces" and land use eco-efficiency,the construction of the indicator system and the selection of the measurement method of land use eco-efficiency,and the spatial and temporal characteristics of land use eco-efficiency,and influcing factors in recent years."This paper compares the literature on the coupling and coordination of economic-social-ecological systems and summarizes the shortcomings in the measurement methods and empirical studies of land use eco-efficiency.Secondly,through an in-depth analysis of the basic connotations of the " three living spaces " and land use eco-efficiency,this paper identifies the theoretical basis for the construction of a land use eco-efficiency index system under the " three living spaces ",and constructs a land use eco-efficiency index evaluation system from production space,living space and ecological space.The evaluation system of land use eco-efficiency indicators is constructed from production space,living space and ecological space,in which production space and living space include both urban and rural areas.Based on this,the super-efficient SBM model,which takes into account non-expected output,is used to measure the eco-efficiency values of land use in each sub-system under the " three living spaces " in 30 provinces in China from 2003 to 2020,except for Tibet,Hong Kong,Macao and Taiwan,and then the entropy weight method is applied to obtain the comprehensive eco-efficiency of land use under the " three living spaces "." Finally,since the "three living spaces" are composed of three subsystems,this paper uses the coupling coordination model to measure the ecological efficiency values of land use in the production space,living space and ecological space.At the same time,as the "three living spaces" are composed of three subsystems,this paper uses the coupled coordination model to measure the coupled coordination level of land use eco-efficiency values in the production space,living space and ecological space,to further analyze the coordinated development of land use eco-efficiency in the "three living spaces".Finally,in order to further clarify the reasons for the differentiation of land use eco-efficiency in the "three living spaces",this paper analyzes the magnitude of the influence of different influencing factors by constructing an individual-time bifixed SDM.The findings of the study are as follows:(1)The results and trends of land-use eco-efficiency under the "Three Life Spaces".At the national level,the average value of China’s land use eco-efficiency under the "three living spaces" from 2003 to 2020 is 0.499,which is at a medium-low level,and the trend of change is "M";among them,the three sub-systems of land use eco-efficiency are at the regional level,the overall land use eco-efficiency of the seven geographic regions under the "three living spaces" fluctuates between 0.4 and 0.6;the production space more than ecological space,which greater than living space.The mean value of them are 0.826,0.517 and 0.333 respectively.At the regional level,the overall land use eco-efficiency of the seven geographic regions under the "Three Life Spaces" fluctuates between 0.4-0.6;among them,the highest land use eco-efficiency value is found in North China under the production space,the lowest in Central China,and the overall decline in the seven geographic regions under the living space;there are obvious differences in the land use eco-efficiency among the seven geographic regions under the ecological space,with South China being much higher than the other geographic regions;at the provincial level,the At the provincial level,the land use eco-efficiency of 30 provinces in China under the "three living spaces" kept increasing from 2003 to 2005,and then declined thereafter;among them,the land use eco-efficiency of 30 provinces in China under the production space is better than that of the living space and the ecological space,and the land use eco-efficiency level under the ecological space is the lowest.(2)Spatial characteristics of land use eco-efficiency in the "three living spaces".The study shows that the spatial differences in land use eco-efficiency under the "three living spaces" are obvious,with higher levels in northern and eastern China and lower levels in northeastern China;the spatial aggregation of land use eco-efficiency under the production space and living space is obvious,while there is no significant spatial correlation in the ecological space as its internal composition remains basicall unchanged.The spatial correlation between the ecological space and the production space is not significant because the internal composition of the space remains the same.(3)The results of the coupling and coordination of land-use eco-efficiency under the "three living spaces".The degree of coupling and coordination of land-use eco-efficiency among production space,living space and ecological space is at a mildly dysfunctional level,i.e.the degree of benign coupling among the three is low.(4)Analysis of the factors influencing the eco-efficiency of land use in the "three-living space".There is a significant spatial spillover effect on the ecological efficiency of land use under the "three living spaces" in China,and the coefficient of the spatial lag term is significantly positive,that is,the improvement of ecological efficiency of land use under the "three living spaces" in one province will have a positive impact on the neighboring provinces.Under the premise of the spatial spillover effect,the economic development still shows a "U" shape on the ecological efficiency of land use in the "three living spaces",and the improvement of industrial structure,population density and openness level will promote the ecological efficiency of land use in the "three living spaces".The increase of industrial structure,population density and openness will improve the ecological efficiency of land use in the "three living spaces";the increase of the proportion of productive land,the degree of land reclamation and the pressure of land finance will have a negative effect on the ecological efficiency of land use in the "three living spaces";the improvement of science and technology and the increase of investment in environmental pollution control will help promote the ecological efficiency of land use in the "three living spaces".Improving the level of science and technology and increasing investment in environmental pollution control are conducive to the improvement of ecological efficiency of land use in the "three living spaces". |
PDF Full Text Request