中文摘要：

目前国际经济和粮食危机，国内水资源和耕地资源危机已经影响到我国粮食安全，粮食安全已成为我国和世界关注的重大问题。我国政府提出了2009--2020年新增粮食500亿公斤潜能计划，艰难攀升的中国粮食安全路在何方？本文从区域粮食新增潜力，粮食单产潜力和农业科技潜力三方面进行了探讨。

英文摘要：

China＇s grain security has suffered from the international crisis of economy and grain, and suffered from internal crisis of water resource and arable land resource. Grain security is vital problem concerned in the world and China. The plan for increasing 0.5 hundred million metric tons of grains from the year 2009 to 2020 is suggested by the Chinese Government. Where is the way for increasing the ability of grain security in China？ In this paper, the authors have made discussions in three aspects： incremental potential for regional grain, unit-area-yield potential and agriculture science and technology potential.