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双三熟制早稻的抽穗开花和灌浆成熟期,正值盛夏,气温高,湿度低,伤害早稻开花授粉和灌浆结实,使空秕率增多,千粒重降低,造成减产。穗期高温是早稻增产的一个大障碍。我们从1975年以来,进行了早稻防高温喷灌试验,经多年多点试验证明,喷灌具有降温增湿,调节小气候的作用,是提高早稻产量行之有效的措施。
The flowering and filling maturity of double-cropping early rice coincided with the mid-summer when the temperature was high and the humidity was low. Early rice pollination and grouting were harmed, which increased the rate of emptying and the weight of 1000-grain, which resulted in the decrease of yield. High temperature in the ear stage is a major obstacle to the increase of early rice. Since 1975, we carried out the early rice high-temperature sprinkler irrigation test, after many years of trial proved that sprinkler cooling and humidification, regulating the role of microclimate is to improve the yield of early rice is an effective measure.