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利用人工气候箱在水稻始花后进行了４～１０ｄ的１６℃低温处理，结果表明水稻的结实率随低温处理时间长度的增加而下降，花期低温导致水稻不育率的升高与柱头上着落花粉量的减少和萌发花粉量的降低有关，推测柱头上的萌发花粉数在６个以上的颖花基本上能够正常结实。
The results showed that the seed setting rate of rice decreased with the increase of the length of low temperature treatment, and the low rate of flowering caused the increase of rice sterility and the increase of stigma The reduction of pollen quantity is related to the decrease of germination pollen volume. It is speculated that the spikelet with more than 6 germination pollen on the stigma can basically be normal and strong.