广西耕地利用效率空间差异及驱动机制

Spatial Differences and Driving Mechanism of Cultivated Land Use Efficiency in Guangxi

利用改进熵值法对2017年广西各县(市/区)耕地利用效率进行了测度,采用GIS空间统计模型分析了其空间集聚特征,并运用地理加权回归模型探究了广西耕地利用效率空间差异驱动机制。结果表明:(1)2017年广西各县(市/区)耕地利用效率值总体不高,各地区之间空间差异性显著;(2)广西耕地利用效率整体上具有显著空间正相关关系,表现为显著的空间集聚效应,存在空间异质性;局部空间差异上呈现高高集聚、低低集聚、低高集聚和高低集聚格局;(3)人均GDP、农村居民人均可支配收入、复种指数、人均耕地面积是影响广西耕地利用效率的主要因素,而提高机械化程度和增加农业科技人员投入是提升广西耕地利用效率的关键。最后,从农业机械化投入、农业科技推广、耕地规模化方向发展、耕地的保护与提升4个方面提出了相关对策建议。

The arable land use efficiency of each county(cities/districts)in Guangxi in 2017 was measured by the improved entropy method,and its spatial agglomeration characteristics were analyzed by the GIS spatial statistical model.The driving mechanism of spatial differences in arable land use efficiency in Guangxi was explored by the geographically weighted regression model.The results showed that in 2017,the arable land use efficiency of all counties(cities/districts)in Guangxi was generally not high,and the spatial differences among regions were significant.The arable land use efficiency of Guangxi as a whole had a significant spatial positive correlation,which represented a significant spatial agglomeration Effect,and there was spatial heterogeneity.Local spatial differences showed high-high agglomeration,low-low agglomeration,low-high agglomeration and high-low agglomeration patterns.Per capita GDP,per capita disposable income of rural residents,multiple cropping index and per capita arable land area were the main factor affecting arable land utilization efficiency in Guangxi,and improving the degree of mechanization and increasing the input of agricultural science and technology personnel were the keys improving the utilization efficiency of cultivated land in Guangxi.In the end,the suggestions were put forward from four aspects:agricultural mechanization investment,agricultural science and technology promotion,the development of arable land scale and the protection and promotion of arable land.