中文摘要：

中低产田改造是提高粮食综合生产能力,保障国家粮食安全的有效途径。东北地区中低产田占耕地面积约2/3,改造中低产田粮食增产潜力巨大,有可能成为21世纪粮食增产潜力最大的地区之一。以松嫩平原黑土区、三江平原、松嫩平原西部区和辽河平原东北部4个区域为重点,针对不同区域特点因地制宜进行中低产田改造。提出推进东北地区中低产田改造的对策措施,为稳定提高粮食综合生产能力提供科学指导。

英文摘要：

It is an effective way for promoting comprehensive grain production capability and guaranteeing national grain security to improvement medium-low yielded farmland.There are 1374.8×105hm2 of medium-low yielded farmland in northeastern China,which take about 2/3 of the whole regional farmland,and it has huge potential by improvement medium-low yielded farmland,and where shall become one of the regions have the biggest potentialof grain increase in China.Different models were planned according to the regional character of black soil region in the Songneng Pain,the Sanjiang Plain,west region of the Songneng Pain and northwest of the Liaohe Plain.Moreover,countermeasures for pushing the improvement of medium-low yielded farmland in northeast China are put forward;the aim is to provide scientifically direction to promote the comprehensive grain production capability of northeast China.