Research On Spatial-temporal Differentiation And Influencing Factors Of Land Use Multi-functionality In Shaanxi Province

As an important resource and material security for human survival and development,land is the basic data in the "human-natural" complex ecosystem.With the rapid development of the social economy,the population scale has gradually expanded,and land resources have become increasingly scarce.However,land use has a huge impact on the ecological environment while creating social wealth and developing economic scale.Therefore,how to use land resources scientifically and rationally,coordinate "human-land relations" and promote sustainable development is particularly important.Based on the county scale of Shaanxi Province,the evaluation is carried out.Firstly,based on the perspective of land use sustainability,the multi-functionality of land use index system is constructed,the weight is determined by mean value method and entropy method,and the threshold of each index is determined according to the actual situation of land use in Shaanxi Province.the multi-functionality of land use of The temporal and spatial differentiation in the study area was analyzed by natural fracture method.Secondly,the correlation between land use change and the multi-functionality of land use is discussed,and the influencing factors of the multi-functionality of land use are further analyzed by using geographic detectors model.Finally,through the research results of the temporal and spatial differentiation and influencing factors of county land use in Shaanxi Province,this paper puts forward some suggestions and measures for the development of county land use in Shaanxi Province.The conclusions are as follows:(1)the multi-functionality of land use evaluation index system based on the sustainable development of land use can not only reflect the structure,function and evolution characteristics of the land system,but also reflect the research on the land function characteristics and evolution process of each unit in the study area.(2)During the study period,the land use types in Shaanxi Province changed dramatically.From the perspective of changes in land use area,the cultivated land in the study area has been decreasing continuously from 2000 to 2015.The forest land,grass land and construction land are increasing,the water area is basically stable,and the unused land is unchanged first and then decreased.trend.From the perspective of the dynamics of land use,the largest changes in land use in the study area from 2000 to 2015 were cultivated land,forest land and grassland,especially the conversion of cultivated land to forest land and grassland.From the perspective of land use circulation,from 2000 to 2015,the study area mainly turned into conversion of cultivated land to forest land,grass land and construction land.(3)The spatial and temporal differentiation of land use utilisation in county counties in Shaanxi Province is significant.Shaanxi County 2000-2015 The social function,economic function,ecological function and total function of land use showed an increasing trend with time.The overall level of land use function increased slowly,but the change was not large.The single function of land use has been slowly inclined to multi-functionality.Sexuality has gradually improved,but it is still dominated by ecological functions.(4)The degree of correlation between the land use types and the multi-functionality of land use is different.Social function has a significant positive correlation with forest land and construction land,and has no significant correlation with other land use types;economic function has a significant positive correlation with forest land and construction land,and has a significant negative correlation with cultivated land;ecological function and forest land and grassland There was a significant positive correlation,which was significantly negatively correlated with cultivated land and construction land;the total function was significantly positively correlated with forest land,grassland,water area and construction land,and was significantly negatively correlated with cultivated land,and had no significant correlation with waters.(5)The factors affecting the multi-functionality of land use in county counties in Shaanxi Province are distinct.Social,economic and ecological functions are affected by different dominant factors,among which social functions are greatly affected by population density,economic functions are significantly affected by land correlation rate,and ecological functions are more consistent with the total area of closed hills for afforestation;The dominant factor of function is ecological function.(6)The proposals and measures for sustainable development of land use in Shaanxi Province can ensure the comprehensive,coordinated and sustainable development of the social,economic and ecological functions of land use in a macroscopic aspect,and achieve sustainable and high-level development of land use.On the micro level,local implementation Land policy,adaptation to land carrying capacity,governance of soil erosion and increased rural income are of great significance.