Spatio-temporal Pattern Of Land Carrying Capacity And Its Driving Mechanism In Inner Mongolia

Based on the land use data,social statistics data and meteorological data of Inner Mongolia from 2000 to 2020,the evaluation index system of land carrying capacity in Inner Mongolia was constructed,and the entropy weight-topsis model,spatial autocorrelation method and geographical detector model were used to deeply explore the spatio-temporal change trend and influencing factors of land carrying capacity in Inner Mongolia.The result of research shows :(1)From 2000 to 2020,the land carrying capacity of Inner Mongolia is mainly weak,accounting for more than 60% of the total area;During the study period,the number of units in the weak bearing area gradually decreased with time,the number of units in the low bearing area gradually increased,and the number of units in the intermediate bearing area showed a slight fluctuation trend.The intermediate bearing area of Inner Mongolia land carrying capacity is mainly distributed in individual banner counties and districts in Hohhot City and Baotou City of Inner Mongolia,the low bearing area is mainly distributed in the eastern,western and central regions of Inner Mongolia,and the weak bearing area is mainly distributed in the east-central and west-central areas of Inner Mongolia.(2)From 2000 to 2020,the Moran’s I of Inner Mongolia’s productive capacity,living capacity,ecological capacity and land comprehensive capacity were all positive.The Z score is greater than 2.58,and the P value is less than 0.01,indicating that the distribution of production carrying capacity,living carrying capacity,ecological carrying capacity and land comprehensive carrying capacity in Inner Mongolia had a significant spatial positive correlation,and the spatial agglomeration distribution trend was obvious.Through the analysis of cold and hot spots,it is found that Hohhot City,Baotou City,Ordos City and Ulanqab City have become the production bearing capacity hot and sub-hot spot agglomeration areas.The living carrying capacity and sub-hot spot agglomeration areas are continuously distributed in Hohhot City,where the capital is located;The ecological carrying capacity hot and sub-hot spot agglomeration areas are distributed in the eastern part of Xing’an League and most of Hulunbuir City.The land carrying capacity hot and sub-hot spot agglomeration area developed from the central to the west,indicating that the central and western parts of Inner Mongolia gradually developed into the land carrying capacity hot spot agglomeration area.(3)From 2000 to 2020,the top three factors affecting the land carrying capacity in Inner Mongolia were per capita land resources,land degradation rate,and biological abundance index.The top three factors of interaction in 2000 are biological abundance index ∩ per capita cultivated land area,biological abundance index ∩ per capita tertiary industry proportion of GDP and biological abundance index ∩ per capita rural residential land area.The top three factors of interaction in 2010 are biological abundance index ∩per capita land resources,biological abundance index ∩ the proportion of tertiary industry in GDP,per capita land resources and grassland coverage rate.The top three factors of the interaction in 2020 are land degradation rate ∩ biological abundance index,the proportion of tertiary industry in GDP,and the output efficiency of construction land.It is further proved that per capita land resources,land degradation rate and biological abundance index are the dominant factors affecting the level of land carrying capacity in Inner Mongolia.Through interaction detection,the influence of two-factor interaction is significantly higher than that of single-factor interaction.It also shows that the change of land carrying capacity level in the actual situation is jointly determined by multiple factors,not controlled by a single factor,and has complexity.