中稻籼的短日高温性最强,所以短日高温生育性是支配中稻籼出穗早晚的主导因子,出穗日数比较稳定。中稻粳的感光性和感温性均比中稻籼强,而短日高温生育性较弱。中稻粳与中稻籼的光,温反应特性差别明显。中稻粳出穗较晚主要受感光性支配,因而近似晚稻的光温反应特性,出穗朗受日长条件影响较大。晚稻籼、粳的光温反应特性基本上是一致的。主要特点是感光性最强,短日高温生育性弱,出穗期主要受感光性所支配。但晚稻籼的 Mid-rice indica has the strongest short-term high temperature, so short-day high-temperature fertility is the dominant factor that controls mid-late indica rice emergence, and the number of heading days is relatively stable. Medium rice sensitivities and temperature sensitivities than mid-rice indica strong, and short-day high temperature fertility is weak. The light and temperature response characteristics of middle rice japonica and middle rice japonica were significantly different. Mid-late japonica rice is mainly affected by photosynthesis at the earliest, and therefore the light-temperature response characteristics of late rice are similar. The photosynthetic reaction characteristics of late indica rice and japonica rice are basically the same. The main feature is the most sensitive, short-term high temperature fertility is weak, mainly at the heading of the photosensitive subject. But late rice indica