目前国内外对早稻高温危害有不少研究,但主要侧重于开花期。考虑到长江下游早稻结实率和产量波动与不同气候背景有关,有的年份在孕穗阶段受梅雨低温影响,开花结实期碰上持续高温影响,如1977年,也有的年份孕穗期梅雨不明显,已遇上高温影响,抽穗结实阶段 At present, there are many researches on the damage of high temperature in early rice at home and abroad, but the main focus is on flowering. Taking into account the lower reaches of the Yangtze River early grain yield and yield fluctuations with different climate backgrounds, and some of the years in the booting stage by meiyu low temperature, flowering and fruiting period hit a sustained high temperature, such as 1977, some of the years booting Mei rain is not obvious, has Encountered high temperature, heading stage