为了探究粮食资源和耕地利用效率的协调统一,利用2000-2019年中国耕地面积和粮食产量数据,以省域为研究对象,基于重心模型和空间错位指数,系统分析全国耕地面积、粮食产量重心迁移轨迹特征及空间错位关系.结果表明:研究期内耕地面积重心与粮食产量重心变化方向不尽相同,耕地面积重心从河南省博爱县向东北移动,而粮食产量重心则先从河南省舞阳县向东北后再向东向平移;全国的粮食产量和耕地面积主要集中在中水平区和中低水平区,且由东到西呈现正向错位到负向错位的分布特征;耕地面积和粮食产量受资源禀赋影响较大,但经济发展水平、人口、降水量和积温水平等因素也具有一定的推动作用.
To explore the coordination and unity of grain resources and cultivated land use efficiency,using the data of national cultivated land area and grain yield from 2000 to 2019,taking the province as the basic unit of data,and based on barycenter model and spatial mismatch index,the characteristics and spatial mismatch relationship of migration trajec-tory of the barycenter of national cultivated land area and grain yield was systematically analyzed.The results show that the change directions of barycenter of cultivated land area and grain yield are not the same during the study period.The barycenter of cultivated land area moved from Boai county,Henan province to the northeast,while the barycenter of grain yield first moved from Wuyang county,Henan province to the northeast and then to the east.The national grain output and cultivated land area are mainly concentrated in the middle and low-level areas showing the distribution characteristics of positive mismatch to negative dislocation from east to west.The cultivated land area and grain yield are greatly influ-enced by resource endowments,but many factors such as economic development level,population,precipitation,and accumulated temperature level also have a certain driving effect.