Research On The Spatial Differentiation And Coupling Coordination Of Cultivated Land Multi-functional Degree In Hunan Province

The function of cultivated land refers to the private and public goods and services that can be obtained from cultivated land through the exploitation,utilization,management,protection.With the continuous development of social economy and the increasing level of human consumption,society and individuals have a new demand for cultivated land.Cultivated land is a highly complex functional system of "economy-society-ecology",the development of cultivated land will lead to changes in the internal coordination of the system.There are dynamic correlations between the functions of cultivated land.It is of great significance to study the characteristics of multi-functional spatial differentiation of cultivated land and the coupling coordination degree of multi-functional synergy of cultivated land for promoting the sustainable use of cultivated land.Taking Hunan Province as the research area,based on the spatial visualization of ArcGIS to analyze the spatial differentiation of cultivated land production function,economic function,ecological function and social function in Hunan Province of 2015.Then this paper explores the multifunctional strength and coupling coordination degree of cultivated land so that we could provide scientific reference for the sustainable utilization of cultivated land in Hunan province.The results show that:(1)The area among the Dongting Lake is the cluster area with high value of cultivated land production function and ecological function,the Western Hunan is the cluster area with high value of cultivated land economic function,and the social function of cultivated land in Hunan Province is on the low side as a whole.(2)The multi-function comprehensive degree of cultivated land and the multi-function coupling coordination degree of cultivated land showed an inverted U-shaped distribution from east to west,and a downward trend from north to south.(3)Among the various geographical zones,the multi-functional comprehensive degree and coupling coordination degree of cultivated land among the Dongting Lake and the inner counties of Western Hunan have convergence.The multi-functional comprehensive degree and coupling coordination degree of cultivated land in Changsha-Zhuzhou-Xiangtan urban agglomeration and central-southern Hunan have significant spatial heterogeneity.(4)The among Dongting Lake area is a multifunctional coordination type of cultivated land.Changsha-Zhuzhou-Xiangtan urban agglomeration and some counties along the main stream of the Xiangjiang River in central-southern Hunan are multi-functional and coordinated cultivated land.The urban development area of Changsha Zhuzhou Xiangtan Urban Agglomeration and South of central-southern Hunan is mainly dominated by ecological function.The dominant function of cultivated land ecological function and the dominant type of economic function are continuous lump distribution in the Western Hunan.The counties at some provincial boundaries are the dominant social security fun ctions of cultivated land.