Study on the evolution and driving mechanism of land function in China from 2005 to 2019

As an important representation of sustainable land development, land function has become a research hot spot in the land research field. To explore the spatiotemporal evolution pattern and its driving mechanism of land function in China, an evaluation index system of land function was constructed. We adopted the weighted sum method to evaluate the land function and used the dynamic change degree of the land function and the coefficient of variation to analyze the spatiotemporal evolution characteristics of the land function. The driving mechanism of land function evolution was studied using grey relational analysis and multiple stepwise regression. The results showed that (1) from 200 to 2019, the total land function (TLF) increased by 10.41%, initially increasing and then decreasing. The land social function (LSF) and land bearing function (LBF) increased by 42.05% and 17.35%, respectively, while the land productive function (LPF), land cultural leisure function (LCF), and land ecological function (LEF) decreased by 3.64%, 4.25%, and 2.51%, respectively. (2) The spatial distribution of the LPF and LCF decreased from east to west, the distribution law of the LSF spread from the edge to the inside, the LBF showed a distribution state of high in the southeast and low in the northwest, and the spatial change law of the LEF decreased from west to east. (3) The driving factors of land function were the built-up area, urbanization rate, population density, and proportion of education expenditure. This paper provides a reference for improving land functions and for the sustainable utilization of land resources.