【摘要】 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。更多还原

【Abstract】 The typical rice varieties in Liaoning,Jilin and Heilongjiang provinces from 1970 to 2010 were used as trial materials to analyze the differences,changes and relationships in yield traits of rice released in different provinces and different years. The results showed that the yield of rice in three provinces from 1970s to 1990s increased by 9.66% and decreased slightly in the beginning of 21st century. The yield of rice increases was mainly attributed to the seed number increases. The yield was significantly positively correlated with panicles per hill,grain number per panicle,primary rachis branches number,second rachis branches number,grain number of primary rachis branches,grain number second rachis branches,panicle length,panicle weight,grain density,ratio of secondary branch grains,but negatively correlated with kernel setting rate,kernel-setting rate of primary branch and secondary branch,and except kernel-setting rate of primary branch,others all reached significantly level.更多还原