科尔沁沙地耕地动态变化及驱动力分析

Analysis of dynamic change and driving forces of cultivated land in Kerqin sandy land

根据科尔沁地区各旗县耕地面积数据,总结出科尔沁耕地面积变化及重心变化和各旗县耕地利用动态度及相对变化率,并且对耕地变化的人口、政策驱动因子进行了分析。结果表明:科尔沁耕地总面积呈现出波动中上升的趋势;整个科尔沁地区耕地变化存在较大的区域差别:北部耕地面积增加幅度要远远高于整个科尔沁地区和南部旗县;耕地重心在纬度上北移比较明显,在经度上则分两个阶段(1996年之前向西移动,1996年之后向东移动)。

According to the data of arable land area in the counties of Horqin area,this paper summed up the change of arable land area and of gravity in Horqin area and the dynamic degree of land use and relative rate of change in the counties. This paper also analyzed the population and policy driving factors which lead to the change of the arable land. The results showed that total arable land in the Horqin showed fluctuations in the rising trend;arable land area changes in the Horqin Region existd great regional difference： the growth of arable land area in northern counties was far greater than the Horqin Region and the southern counties; the center of gravity of the cultivated land was obviously moving at the latitude and it divided into two stages in the longitudinal movement （it moved westward before 1996 and eastward after 1996）.