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杂交稻南优六号结实率比常规籼稻低,除其本身有不育因子外,不良环境条件,其中高温对颖花的伤害是一个重要因素。1979年,我们采用分期播插的方法,着重观察了高温影响南优六号开花结实的情况。一、高温对杂交稻南优六号颖花的伤害 (一)伤害颖花的临界高温据我们1979年对20个稻穗,2866朵颖花的定时观察、记载和分析得出:在自然条件下35℃以上的高温对南优六号结实率影响最明显。我们将伤害颖花的临界高温定义为:“危害高温。”并设34℃、35℃和36℃三个不同的危害
The seed setting rate of hybrid rice Nanyou 6 was lower than that of conventional indica rice. Except for its own infertility factor, the unfavorable environmental conditions, in which high temperature caused the damage of spikelets, was an important factor. In 1979, we adopted the method of staged broadcast, focusing on the impact of high temperature on the Nam You 6 flowering firm. First, the high temperature on hybrid rice Southern Youyou spike injury (A) damage spikelets critical high temperature According to our 1979 on 20 ears of rice, 2866 spikelets of the timing observation, record and analysis: in natural conditions Under the high temperature above 35 ℃, the effect on the seed setting rate of Nan You 6 was the most obvious. We define the critical high temperature damage to spikes as: “Hazardous to high temperatures.” And three different hazards, 34 ° C, 35 ° C, and 36 ° C