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从产量构成因素角度分析，水稻产量＝穗数×每穗总数×结实率（成熟率）×粒重（千粒重）。籽粒充实度差是籼粳亚种间杂种优势利用的重要限制因素，亚种内杂交稻和常规品种特别是大穗型高产品种也同样存在这一问题。可见籽粒充实程度与水稻产量有直接关系，是水稻栽培和育...
From the perspective of yield components, rice yield = spike number × total spike × seed setting rate (maturity) × grain weight (1000-grain weight). The difference in grain filling degree is an important limiting factor for the heterosis utilization between indica and japonica subspecies. Hybrid rice and conventional varieties in subspecies, especially those with large panicles also have the same problem. Visible grain enrichment and rice yield is directly related to rice cultivation and breeding ...