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利用稻米品质不同的３个粳稻品种，对灌浆过程中籽粒干物质、直链淀粉及蛋白质的积累规律进行了比较研究。结果表明，在灌浆过程中籽粒干物质、直链淀粉及蛋白质的积累趋势，其品质不同的品种基本一致，积累速度表现为灌浆前期快，而后期缓慢，但在灌浆过程中的不同时期积累速度和数量上品种间表现有差异；开花后３０ｄ内是籽粒干物质、直链淀粉及蛋白质积累的关键时期，３０ｄ以后积累基本趋于稳定；灌浆前期的日平均干物质积累速度与稻米垩白率呈显著的正相关，与胶稠度呈显著的负相关，而后期的日平均干物质积累速度与垩白率、胶稠度的相关均不显著。
Three japonica rice varieties with different rice qualities were used to study the accumulation of dry matter, amylose and protein during grain filling. The results showed that the accumulation trend of dry matter, amylose and protein in grains during grain filling was consistent with that of different quality varieties. The accumulation rate was fast in early filling stage and slow in late filling stage, but the accumulation rate in different stages of filling process And the number of cultivars were different. Within 30 days after flowering, the accumulation of dry matter, amylose and protein in the grain was the critical period. After 30 days, the accumulation tended to be stable. The average daily dry matter accumulation rate and the chalkiness rate There was a significant positive correlation between the dry matter accumulation rate and the gel consistency. However, there was no significant correlation between the average daily dry matter accumulation rate and chalkiness rate and gel consistency.