中文摘要：

以东北地区40个地市（盟）为主要评价单元，从粮食单产水平、粮食单产增长率、主要作物单产水平3个角度，运用数理统计、GIS分析等多种方法，全面分析了2004年东北地区粮食单产的区域差异。结果表明：东北地区粮食单产平均水平为4850kg／hm^2，中部较高，东部和北部较低；大部分地市的粮食单产年均增长率（1997～2004年）集中在0—10％之间，阜新粮食单产年均增长率最高，高达40．31％；同一地市粮食产量、单产水平、单产增长率表现出严重的失衡发展状态；主要作物水稻、玉米、大豆单产分别在6000kg／hm^～7000kg／hm^、6000kg／hm2～8000kg／hm2、2000kg／hm2—3000kg／hm2水平上的地区较多。整体来看，东北地区粮食单产水平区域差异较大，从高至低依次为吉林、辽宁、黑龙江、蒙东。图3，表3，参10。

英文摘要：

Taking 40 prefectural cities as assessment unit and using mathematical statistics indicators and geography information system, the paper presents comprehensive analysis on regional variations of grain yield of per hectare in northeast China in 2004, with three viewpoints of grain yield per hectare,annual growth rote from 1997 to 2004 and main crops＇ yield per hectare. The average grain yield per hectare is 4 850.22 kg in 2004.The yields in central area are higher than those in the eastern and northern part of northeast China. From 1997 to 2004, the annual growth rates of grain yield per hectare in most prefectural cities are lower than 10 percent, and the rate of Fuxin city, 40.31 percent, is highest among the 40 cites. There are few cities with balanced development among grain production, grain yield per hectare and its growth rate. In most cities, the grain yields per hectare of flee, corn and soybean,main crops of northeast China,are from 6 000 to 7 000 kg,6 000 to 8 000kg and 2 000 to 3 000 kg, respectively. Generally, there are significant regional variations of grain yield per hectare, and the order from high to low is Jilin, Liaoning, Heilongjiang province and eastern Inner Mongolia at provincial level.