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通过水稻４种类型代表品种对模拟阴害的反应，阐明了水稻分蘖期间不同品种受到同等程度的阴害处理后，生育期较长的两个粳稻品种穗数减少的比例小，其减产率显著小于两个杂交稻组合；而营养生长期长的晚粳稻品种受阴害后减穗率又小于中粳稻品种，其减产比例也比中粳品种小得多。不同品种在相同弱光下开花灌浆结实，其弱光对产量的影响应视各品种的结实率受危害程度而异。亚优２号与汕优６３两个杂交组合的结实率，分别比对照下降２８．９％和２６．５％，它们的减产率分别比两个粳稻品种约高６％～４％和９％～７％。由此可见，不论是水稻分蘖期间或是开花灌浆期间受阴害，粳稻品种的受害程度轻于籼稻品种（或组合）；晚粳稻品种又轻于中粳稻品种。
Based on the responses of 4 representative rice varieties to simulated catastrophic damages, it was clarified that the percentage of spikelets of two japonica rice varieties with longer growth period decreased when the different cultivars were treated at the tillering stage, and the rate of yield reduction was significant Less than two hybrid rice combinations; and late japonica rice varieties with long vegetative growth stage were less susceptible to pest injury than middle japonica rice varieties, and their yield reduction ratio was also much smaller than that of middle japonica rice varieties. Different varieties of the same low light flowering grouting strong, the impact of its low light on the yield should be regarded as the seed setting rate of the varieties vary by degree of harm. Seed setting rate of two hybrid combinations of Yayou 2 and Shanyou 63 decreased by 28.9% and 26.5% respectively compared with the control, and their yield reduction rate was about 6% -4% and 9% higher than that of two japonica rice varieties respectively. ~ 7%. It can be seen that the damage degree of japonica rice varieties is lighter than that of indica rice varieties (or combinations), both in the tillering stage of rice and during the flowering filling stage; the late japonica rice varieties are lighter than the middle japonica rice varieties.