我国粮食分布重心轨迹特征及动力

CHARACTERISTICS AND DYNAMIC FORCE OF PATHWAY OF CENTRE OF GRAVITY OF GRAIN DISTRIBUTION IN CHINA

我国粮食分布重心轨迹特征是:(1)位于东南;(2)沿东北——西南方向往复摆动;(3)由趋向西南转趋向东北。我国粮食分布重心移动是产量空间结构变化的结果,粮食产量力矩是粮食分布重心移动的动力,不同时期粮食产量力矩构成的区域差异是造成粮食分布重心移动方向不同的基本原因,促进我国粮食分布重心合理移动的关键在于扩大西部地区粮食生产的规模。

The charaeteries of pathway of the centre of gravity of grain distribution in China are as follows:1. It stands in the southeast.2. It vibrates back and forth along northeast and southwest.3. The tendency to southwest is changing to the northeast.The movement of the centre of gravity of grain distribution in China is the result of the change for space construction of output of grain.The force moment for output of grain is dynamic force for movement of the centre of gravity of grain distribution. The regional difference of the formation of force moment for output of grain during different periods is the basic reason of different directions of the movement of the centre of gravity of grain distribution. In order to promote a rational movement of the centre of gravity of grain distribution in China, the key point is to expand the grain-producing scale in the western area.