内蒙古中部地区土地利用变化区域差异分析

THE REGION DIFFERENCE IN LAND USE CHANGE OF MID-INNER MONGOLIA

采用地理信息系统(GIS)空间叠加的分析方法以及数理统计方法,选择土地利用变化类型面积比和土地利用变化类型重要值2个指标,分析了内蒙古中部地区不同自然生态区土地利用变化空间分布特征.其结果表明:土地利用类型之间的相互转化在很大程度上受自然条件的限制,土地利用转化类型的面积比沿着干旱半干旱半湿润的梯度逐渐变化;土地利用变化的方向总体上是耕地和草地之间的相互转化,同时大量的草地转化为其他用地也是一个值得关注的问题.

The effects of land use change are significant in global environmental change and sustainable development, especially on water circle, environment quality, biodiversity, productivity and response capacity of terrestrial ecosystem. This is an important part of the research on global environmental change. The article uses space overlay and statistical method, selects area proportion and importance value of land use change type, and analyses the spatial feature of land use change type under different physical ecoregions in mid-Inner Mongolia. It shows that the constraints to the translation between land use is different under different physical ecoregions, and the area proportion changes gradually along arid to semiarid to semiwet belt. In general, the direction of land use change is translation between plowland and grassland; at the same time, the translation of plentiful grassland into otherland must be paied attention to.