广西国家级贫困县土地集约利用空间分异特征研究

Research on space differentiation characteristics of land intensive utilization in national poverty county of Guangxi Autonomous Region

土地利用水平与社会经济发展水平有着紧密的联系。在贫困地区,社会经济发展水平落后,科技文化水平也相对落后,土地利用粗放情况较为严重,为了制定更有针对性的土地扶贫政策,为其在土地利用方面提供实证数据和空间可视化结果,文章运用空间集约利用度三维模型与空间自相关性模型,在ArcGIS与GeoDA平台的支持下,以广西国家级贫困县为研究对象,选择2006年、2008年、2010年、2012年、2014年五个时间截面,对研究区域土地集约利用度的空间分异特征进行研究。结果表明:(1)在研究时段内,研究区域范围土地集约利用度总体处于上升趋势;(2)研究区域南部地区土地利用集约度在整体上普遍高于北部;(3)在2006~2012年期间研究区域范围内的Moran’s I值降低,土地集约利用度空间集聚性逐渐减弱,集约利用情况差异逐渐增大,在2012~2014年期间研究区域范围内的Moran’s I值升高,土地集约利用度空间集聚性逐渐增强,研究区域之间的土地集约利用度的差异开始缓慢减小。

The level of land use is closely related to the level of social and economic development.In poor-stricken area, the level of social and economic development is backward and correspondingly so is the level of scientific and technological culture and the conditio n of extensive use of land is more serious.To enact more targeted land policy for poverty alleviation and provide the empirical data of lan d use and spatial visualization result for the poor area, the paper takes research by using the Three-Dimensional model of space intensive utilization degree and spatial autocorrelation model. It studies on space differentiation characteristics of land intensive utilization of natio nal poverty county of Guangxi Autonomous Region according to choosing five time sections（2006, 2008, 2010, 2012, 2014.） under the s upport of Arc GIS and Geo DA platforms.Three results taken from the research are as follows：Firstly, during the study period, the land use intensity of study area generally was on the rise.Secondly, land use intensity of the southern area is generally higher than the northern are a.Thirdly, from 2006 to 2012, the Moran＇s I value of the study area decreased, land intensive utilization degree of spatial agglomeration g radually weakened and difference of intensive utilization enlarged gradually; while from 2012 to 2014, the condition changes in the oppo site direction of previous one.