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１９８９～１９９０年在大田条件下，对杂交籼稻和常规籼、粳稻等１２个品种每穗颖花现存数等穗部性状进行了观察，结果表明，不同品种每穗颖花现存数差异很大，其差异主要由２次颖花现存数的变化所致。每穗颖花现存数高的品种，２次颖花现存数的比例大。每穗１，２次颖花现存数分别主要决定于１，２次枝梗现存数。每穗颖花现存数随每穗颖花分化数的增加而提高，但颖花现存率却随之降低。每穗颖花现存数可分解为抽穗期单茎干物重和每克干物质形成现存颖花能力２个因素，只有两者同时提高，每穗颖花现存数才能大幅度地增加。
Under the field conditions from 1989 to 1990, the spikelet traits such as the number of spikelets per panicle of hybrid indica rice, conventional indica rice and japonica rice were observed. The results showed that the existing number of spikelets per panicle of different varieties varied greatly, The difference is mainly caused by the change of the existing number of 2 spikes. Spikelets per spike existing high number of species, the ratio of 2 times the existing spikelets large. The existing number of spikelets per spike 1 and 2, respectively, is mainly determined by the existing numbers of 1 and 2 branches. The number of spikes per spike increased with the number of spikelets per spike, but the existing rate of spikelets decreased. The existing number of spikelets per panicle can be decomposed into two factors: the dry weight of single stem at heading stage and the ability of existing spikelets per gram of dry matter. Only when the two are simultaneously increased, the existing number of spikelets per spike can be greatly increased.