中文摘要：

在我国目前的粮食需求市场中，由于政府仍然承担着粮食收购的主要任务，因而粮食市场上的收购与销售价格也就或多或少地带有着一定的垄断性；而恰恰是收购市场上的这种垄断性，又使得我国的粮食需求市场主体更多地呈现出了一种比较典型的二元特征。作为理性的市场主体，由于政府考虑得更多的是城市居民的生活保障及物价的平稳波动问题，因此在目前之情形下，政府减少价格补贴与降低市场均衡价格乃是现阶段我国粮食价格及产量波动的主要原因。不仅如此，政府的这种策略还无形中使得粮农逐渐丧失了进行农业生产的积极性和最终导致了我国相对稀缺的土地资源很难真正地实现合理的配置与科学地利用。

英文摘要：

In current China＇s grain supply and demand market, because governments still undertake the task for purchasing grain, buying and selling price in the market is still something of monopoly, furthermore, because of this monopoly, the main body of China＇s grain purchasing market shows dual structure. As rational market subjectivity, the governments consider more about residents＇ life insurance and grain＇s price stability. Thus, under current situation, it is main reason for China＇s grain price vibration that the governments reduce subsidies and reduce market balance price. The behaviors of the government make the peasants lose activity to produce grain, which leads to rare land resources to be difficult to realize reasonable allocation and scientific use.