基于重心模型的中国粮食生产与加工时空耦合分析

The Spatio-temporal Coupling Analysis of Grain Production and Processing Based on the Center of Gravity Model

保障粮食安全从抓粮食生产向抓粮食产业转型升级转变,将粮食产业增值收益和粮食产业主体留在产区,是提高产区种粮积极性的有效手段。采用重心模型,从全国层面分析2017—2020年粮食生产重心与加工重心的演变趋势、时空耦合程度,评价我国粮食生产和加工耦合协调水平的空间格局。结果表明:我国粮食生产集聚重心迁移方向整体向北偏西迁移,粮食加工集聚重心整体向北偏东迁移,粮食生产和加工的重心总体向北迁移,具有变动一致性,粮食加工集聚重心迁移距离要高于粮食生产集聚重心迁移距离。粮食生产与加工集聚重心的空间距离在逐年减小,粮食产加空间耦合性越来越好。产粮大省要发挥粮食生产优势,挖掘粮食加工产业发展潜力。

To ensure food security,the focus has shifted from increasing food production to transforming and upgrading the food industry,and retaining the added value of the food industry and its main entities in the production areas is an effective way to increase the enthusiasm for grain production in these areas.Using the gravity model,this study analyzed the evolution trends and spatiotemporal coupling degree of the gravity centers of grain production and processing at the national level from 2017 to 2020,and evaluated the spatial pattern of the coupling and coordination level between grain production and processing in China.The results showed that the agglomeration gravity center of grain production in China has generally shifted northwestward,while the agglomeration gravity center of grain processing has generally shifted northeastward.The gravity centers of grain production and processing have overall shifted northward,showing consistency in their movements,with the migration distance of the agglomeration gravity center of grain processing being greater than that of grain production.The spatial distance between the agglomeration gravity centers of grain production and processing has been decreasing yearly,indicating better spatial coupling between grain production and processing.Major grain-producing provinces should leverage their advantages in grain production and tap into the development potential of the grain processing industry.