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本试验在开花期对水稻进行处理，以柱头上着落花粉粒数、萌发花粉粒数及最终结实率为指标，来鉴定和探讨Ｃｒ－２３、东农４１５及Ｃｒ－５３对花期低温的反映。结果表明花粉萌发数与结实率呈显著正相关（ｒ＝０．５９６５）；Ｃｒ－２３为较耐花期低温的品系。
In this experiment, the rice was treated at flowering stage. The index of pollen grains, pollen grains and final seed setting rate on stigma was used to identify and discuss the response of Cr-23, Dongnong 415 and Cr-53 to the low temperature of flowering. The results showed that there was a significant positive correlation between pollen germination rate and seed setting rate (r = 0.5965). Cr-23 was more resistant to cold temperature.