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在云南水稻高产环境下种植6个籼稻品种（IR6559、IR59682、IR65467、IR72、汕优63、桂朝2号），在没有破坏水稻自身的源库关系的情况下，分析了开花期、成熟期及开花至成熟期的部分生理因素对结实率的影响。结果表明，开花期总颖花数、粒叶比、物粒比、比叶重、颖花茎鞘量是影响结实率的主要因素。开花至成熟期间，运转量是影响结实率的唯一因素。成熟期结实率对产量、收获指数的影响较大，而成熟期结实率本身又受到物粒比的制约。
Six indica rice varieties (IR6559, IR59682, IR65467, IR72, Shanyou 63 and Guichao No.2) were planted under high-yielding rice in Yunnan Province. Without damaging the source-sink relationship of rice, flowering and maturity stages And some physiological factors from flowering to maturity on seed setting rate. The results showed that the total number of spikes, grain-leaf ratio, grain-to-grain ratio, specific leaf weight and the amount of stems and scabs at the flowering stage were the main factors affecting the seed setting rate. Flowering to maturity, the amount of rotation is the only factor affecting seed setting rate. The seed setting rate at mature stage has a great influence on the yield and harvest index, while the seed setting rate at mature stage is restricted by grain-to-grain ratio.