以辽宁、吉林和黑龙江三省20世纪70、80、90年代和2000年以后有代表性水稻品种为试材,分析年代间及省份间水稻品种产量差异、变化及其相互关系。结果表明:东北三省20世纪70年代到90年代产量增长了9.66%,21世纪初产量略有下降,近年来产量的增加主要归功于穗粒数的增加;从东北三省总体来看,穗数、穗粒数及与其密切相关的一、二次枝梗个数和粒数、穗长、穗重、着粒密度、二次粒率均与产量呈极显著正相关,结实率及与其密切相关的一、二次枝梗结实率基本均与产量呈负相关,除一次枝梗结实率外,其它均达到显著水平。 Taking representative rice varieties from 1970s, 1980s, 1990s and 2000s in Liaoning, Jilin and Heilongjiang provinces as test materials, the differences, changes and their correlations among rice varieties during and among provinces were analyzed. The results showed that the output of three provinces in Northeast China increased by 9.66% from the 1970s to the 1990s and the output decreased slightly in the early 21st century. The increase of output in recent years was mainly due to the increase of grains per spike. From the three northeastern provinces, The number of grains per spike and their number of primary and secondary branches and their number of grains, spike length, spike weight, grain density and secondary particle rate were all significantly and positively correlated with the yield, the seed setting rate and its closely related Primary and secondary branch fruiting rate were basically negative correlation with yield, with the exception of a branch fruiting rate, the other reached a significant level.