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以目前大面积生产应用的2个粳稻不育系“寒丰A”、“秀水一04A”和R378等3个粳型恢复系配组成5个杂交组合，分析了杂交粳稻的库源特征及其对籽粒充实度的影响。结果表明，杂交粳稻产量库容优势明显，且这种优势主要表现为穗大；杂交粳稻抽穗期叶面积大、茎鞘干物质输出率高；成熟期杂交粳稻虽然叶面积下降幅度较小，但单位颖花获得的干物质量不如亲本和常规粳稻的多，而且，由于抽穗后期的干物质生产量对籽粒贡献最大，故杂交粳稻后期源库比例失调，因而籽粒充实度低下，但杂交粳稻出穗前干物质生产对籽粒充实度具有正效应。
Five japonica restorer lines including two japonica CMS lines, “Hanfeng A”, “Xiushui 04A” and R378, were used for large-scale production to form five cross combinations. The characteristics of the source of hybrid japonica rice were analyzed Effect on grain fullness. The results showed that the yield and yield of hybrid japonica rice had obvious advantages, especially the spike. The hybrid rice had large leaf area at heading stage and high stem and sheath dry matter output rate. Although the decrease of leaf area of japonica hybrid rice at maturity was smaller, However, the dry matter yield of spikelets was less than that of the parents and the conventional japonica rice. Moreover, the dry matter yield at the late heading stage contributed the most to the grain, so the percentage of late maturity hybrid rice was poor, Dry matter production has a positive effect on grain filling.