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本文通过对江苏淮北地区５０—８０年代先后推广的１６个夏大豆代表品种单株干物质积累的变化及其与产量的相关性研究，看出本区夏大豆品种更替过程中，随着品种性状的改良和产量的提高，单株干物质相对生长率三节和六节期无显著差异，盛花期则由大变小，且与籽粒产量呈极显著负相关；单株干物质积累速率在盛花期前改良种低于早期地方种，而盛花期后迅速提高，且与籽粒产量呈极显著正相关。在品种更替中以营养生长为主的苗期至盛花期缩短，单株干物质积累显著下降，而以生殖生长为主的盛花期至成熟期延长，单株干物质积累显著增加是大豆品种改良的结果。
In this paper, we investigated the changes of single plant dry matter accumulation in 16 summer soybean cultivars promoted from 1950s to 1980s in Huaibei, Jiangsu Province and their correlations with the yield, and found that with the variety traits Improvement and yield increase, the relative growth rate of single plant dry matter no significant difference between three and six, blooming period from big to small, and the grain yield was significantly negatively correlated; single plant dry matter accumulation rate at full flowering The former improved species was lower than the early native species, but rose rapidly after full bloom, and had a significant positive correlation with grain yield. In variety alternation, vegetative growth mainly shortened at seedling flowering and flowering stage, and the dry matter accumulation per plant decreased significantly. However, the prolongation from full flowering stage to mature stage with reproductive growth and the significant increase of single plant dry matter accumulation were the improvement of soybean varieties the result of.