华南南部属于南亚热带,双季晚稻生长发育的生态特点,主要是气温由高到低,光照由长变短,辐射的强度较大,中后期易受 台风降温的影响。因此,晚季水稻一般选用感光性的稻种,因为这一类品种或组合,需要一定的短光照条件才能转入生殖阶段,营养生长期不受高低温度影响而缩短或延长,生 The southern South China belongs to the ecological characteristics of the growth and development of the South Asia subtropical and double seasons late rice. The main features are: the temperature is from high to low, the light is shorter and shorter, the intensity of radiation is larger, and the typhoon tends to cool in the middle and late stages. Therefore, the late rice generally use photosensitive rice species, because this type of variety or combination, the need for some short-term light conditions can be transferred to the reproductive stage, vegetative growth period is not affected by high and low temperature and shorten or extend the life