九十年代以来，我国传统的“南粮北调”格局愈益明显地被“北粮南调”格局所取代。对有关统计资料的分析表明，这一调运格局变化乃是生产地域重心由南向北逐渐推移的结果。粮食生产重心渐趋北上的原因是多方面的，其中粮食需求压力、生产知识和技术进步、经济体制变革是最基本的动力机制。

The traditional grain transportation pattern in China, which is characterised as transporting grain produced in south to north, has been obviously replacd by a new pattern known as ‘transparting grain produced in north to south’. The analysis based on statistical materials shows that this change results from the movement of grain production centers from south to north. The causes which push the production centers to north are various, however, the food demand pressure, the technological advance and the economic system reform are the basic ones.