| China has a vast territory,but it also has an enormous population.In the decades of rapid economic and social development in China,it has always been required to implement the concept of intensive development in various industries.As far as land resource management is concerned,relying on the advantages of Chinese national system,the system of land intensive use with Chinese characteristics has experienced a process from establishment to relatively perfect,and has made tremendous contributions to improving the level of land intensive use in China.However,under the background that economic development is the first priority,there are still some problems,such as the disorderly expansion of built-up land,the cultivated land abandonment with the improvement of urbanization,although the current land intensive use system has largely curbed the development of the above problems,but did not fundamentally eradicate the phenomenon.In the new historical period,Chinese economic aggregate has ranked second in the world,economic development path has changed from simply pursuing economic aggregates to high-quality development guided by the five development concepts of “innovation,coordination,green,openness,and sharing”,which emphasized the green development with the ecological environment as a rigid constraint.In order to better serve the transformation and upgrading of the economic structure and ecological environment protection,and the modernization of the national governance system,the system of the natural resource management is also being reshaped.In summary,this study believes that it is necessary to reanalyze the evolutionary path of the concept of land intensive use in practice and theoretical study,and then construct a framework of land intensive use analysis that is compatible with the development of society and economy,so as to scientifically portray the characteristics of land intensive use.On the basis of considering the impact of resource-environmental carrying status and economic structure asymmetries on land intensive use,it is of great practical significance to formulate differentiated land intensive use management,which are important for ecological civilization construction and urban-rural integration development.Through the overseas literatures,the research on land intensive use at home and abroad is rich,mainly focusing on the concept connotation,related factors,evaluation system or measurement method of land intensive use.However,due to the differences in cultural and social systems,the focus is not the same.Less research is carried out from the point of the class in foreign countries,more consideration is given to agricultural development and urban development.On the other hand,foreign studies have less consideration of spatial scale effects than domestic studies,focusing on the relationship and rules of influencing factors and intensive use from time scales.Compared with domestic research,the systematic thinking of foreign research is more obvious,and the idea of guiding management policy formulation according to the development law is worth learning,but it is not conducive to the formulation of specific natural resource management policies.Domestic research focuses on quantity control and is conducive to specific formulation and implementation of policies.However,the protection of ecological environment and resource intensive takes more and more priority over the development of economy and society.Therefore,this paper used regional economic theory,sustainable development theory,human-land relationship theory,new urbanization theory,and ecology civilization theory and system theory as the theoretical guidance,and took the Yangtze River Economic Belt as the research area,to discuss the practical necessity and scientific value of the research on land intensive use.Then it analyzed the new requirements of the current reorganization of natural resource management system to the management of land intensive use,and defined the research framework of land intensive use from the target,concept connotation,technical system and expected goals.Based on the new land intensive use analysis framework,this paper constructed a land intensive use evaluation system to evaluate the intensive use level of the Yangtze River economic belt and analyzed its descriptive statistical characteristics;through spatial autocorrelation measurement model,the spatiotemporal transition analysis,spatial coupling coordination model explored the spatiotemporal differentiation characteristics of the intensive use level of the Yangtze River Economic Belt.Secondly,it analyzed the impact mechanism of resource-environmental carrying state and economic structure differences on land intensive use.Based on this,the related model was introduced to empirically study the impact mechanism of resource-environmental carrying status and economic structure differences on land intensive use in the Yangtze River Economic Belt.Based on the partition results of land intensive use evaluation,the partition results of resource-environmental carrying status assessment,the partition results of economic structure differences measurement,combined with the thought of land intensive use differential management,the paper analyzed land intensive use of differentiated management from the perspective of the priority of economic development and the priority of resource-environmental protection.The research conclusions as follows:(1)The spatiotemporal differentiation of land intensive use in the Yangtze river economic belt is fully revealed.Based on the evaluation method of land intensive use,the intensive use index of built-up land,the intensive use index of cultivated land and the comprehensive intense use index of land were measured.From the perspective of statistical description,the average level of different evaluation units in the Yangtze River Economic Belt is uneven,and the built-up land and cultivated land aren’t intensive in many units,and are mostly distributed in the middle and upper reaches of the Yangtze River.The units with higher levels of built-up land intensive use and cultivated land are mainly distributed in the lower reaches of the Yangtze River.In terms of temporal distribution,the distribution of high-value areas and low-value areas of built-up land is more and more dispersed,while cultivated land is opposite.From the comprehensive intensive use index of land,it can be found that the level of land intensive use of the Yangtze River Economic Belt is more concentrated than that of built-up land and cultivated land,and the units with high-value level and the units with low-value level are mostly concentrated in the middle and lower reaches of the Yangtze River Economic Belt,and the concentration of the high-value area and the low-value area is less changed.From the results of spatiotemporal transition analysis,there are fewer spatial correlation transitions,but they are more obvious in the spatial transition autocorrelation.From the perspective of the spatial autocorrelation and coupling coordination,the level of the intensive use of built-up land,cultivated land and the comprehensive land in the Yangtze River Economic Belt presents a high spatial autocorrelation.From large to small,it is comprehensive land and cultivated land,and built-up land,the spatial autocorrelation of built-up land fluctuates most from the time scale.Based on the calculation results of the spatial coupling coordination model of Getis-Ord Gi* and the traditional coupling coordination model,it is found that the coupling degree between the built-up land and the cultivated land is at a very high level,but the coordination degree is poor,and does not form a coordinated development pattern that promotes each other.(2)The impact mechanism of resource-environmental carrying status and economic structure differences on land intensive use in the Yangtze River Economic Belt is fully explained.Through the analysis of the connotation of the resource-environmental carrying status,the theoretical basis of its definition is demonstrated.Through the analysis of its impact mechanism,the impact of human social and economic activities on the resource-environmental carrying status and land intensive use level occurs simultaneously and exists.At the same time,the state of resource-environmental carrying status promotes or inhibits the level of land intensive use;based on the constructed resource-environmental carrying state measurement index system,combined with the land intensive use evaluation index system,it is found that the positive relationship between the level of environmental pressure and cultivated land intensive use and the negative relationship of resource consumption level and built-up land intensive use level.On the other hand,from the perspective of the impact mechanism of economic structure differences on land intensive use,the economic structure characteristics such as spatial correlation and geographical concentration of economic structure affect the level of land intensive use in the region.Based on the decomposed effect of the Spatial Durbin Model,three industries have strong spatial spillover effects on the built-up land or cultivated land.From the perspective of built-up land,the direct effect and indirect effect of the primary industry are positive;the direct effect of the secondary industry is negative,but the indirect effect is positive;however,the direct effect of the tertiary industry is positive,but the indirect effect is negative.From the perspective of cultivated land,the direct and indirect effects of the primary and secondary industries are positive,but the direct effect of the tertiary industry is positive and the indirect effect is negative.The research results provide an important basis for the construction of the synergistic system of differential management about resource-environmental utilization and protection,economic transformation and land intensive use.(3)A differentiated management system for intensive land use in the Yangtze river economic belt is established under the coordination of economic development,resource-environmental utilization and protection.Firstly,theoretically,based on the partition of the intensive use of land and its influencing factors,considering the different perspectives of the priority of economic development,resource-environmental utilization and protection,and finally achieving synergy differentiated management path between resource-environmental utilization and protection,land intensive use and economic transformation and development.Secondly,based on the evaluation results of land intensive use,the intensive utilization level of built-up land,cultivated land and the comprehensive land are divided according to the natural discontinuity classification method,which are divided into first-level,second-level and third-level,fourth-level district.At the same time,based on the average value of the resource-environmental carrying status,the different evaluation units are divided according to the resource consumption-environmental pressure intensity based on the K-means clustering method,which are respectively divided into the highest environmental pressure zone and the higher environmental pressure zone,the lower environmental pressure zone,the lowest environmental pressure zone and the highest resource consumption zone,the higher resource consumption zone,the lower resource consumption zone and the lowest resource consumption zone.Also,Based on the economic structure difference measurement method of the Yangtze River economic belt,the total economic amount of the primary industry,the tertiary industry and the secondary industry do not necessarily overlap from the characteristics of the geographical concentration degree,and only the geographical distribution of the secondary industry and the total economic amount overlaps,and both the primary industry and the tertiary industry show strong regional concentration characteristics.On the basis of the added value of the primary industry,the secondary industry and the tertiary industry,the leading industries of the Yangtze River Economic Belt are divided based on the degree of specialization.The different evaluation units of the Yangtze River Economic Belt can be divided into the primary industry leading units,the secondary industry leading units,the tertiary industry leading units,the primary industry and the secondary industry leading units,the primary industry and the tertiary industry leading units,the secondary industry and the tertiary industry leading units.Thirdly,based on the zoning results of the above and the idea of differential management of land intensive use,this paper analyzes the differentiated management ideas of land intensive use improvement and direction adjustment from the perspective of economic development priority,resource-environmental utilization and protection priority.It will help to give full play to regional synergies and provide decision-making basis for the ultimate realization of the green and sustainable development of the Yangtze River Economic Belt. |
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