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本试验是观察早稻开花结实对35℃高温伤害的敏感期。试验在人工气候室进行。早稻开花结实对高温的伤害存在着一个敏感期,即高温伤害最严重的时刻。对于空粒、秕粒和粒重三项性状而言,它们的敏感期各不相同。在早稻开花期,高温引起的伤害主要表现为空粒率的增加。对单花而言,敏感期为开花前一天;对稻穗或稻田群体而言,敏感期为盛花前一天。在农业生产中,如果我们掌握了高温伤害的敏感期,又能正确地了解伤害温度的出现时间和田间水稻的生育状态,就有可能及时采取防治措施,减少高温所引起的产量损失。
This experiment is to observe early rice flowering and fruiting sensitive period of 35 ℃ high temperature injury. The experiment is carried out in the artificial climate chamber. There is a sensitive period of early rice blooming strong injury to high temperature, that is, the moment of high temperature injury the most serious. For the three traits of grain, grain and grain weight, they have different sensitivities. In the flowering stage of early rice, the damage caused by high temperature is mainly the increase of the empty grain rate. For single flower, the sensitive period is the day before flowering; for the ear of rice or paddy field, the sensitive period is the day before flowering. In agricultural production, if we master the sensitive period of high temperature injury and correctly understand the occurrence time of injury temperature and the fertility status of rice in the field, it is possible to take timely prevention and control measures to reduce the yield loss caused by high temperature.