一、试验目的晚稻的生长发育与温度、光照等气象条件有密切的关系。温度的高低和光照时间的长短,对晚稻生长发育过程有重要的影响。本试验的目的,在于通过不同播种期的处理,使晚稻在不同的气象条件下进行生长发育, First, the purpose of the experiment Late rice growth and development and temperature, light and other weather conditions are closely related. The level of temperature and the duration of light have an important effect on the growth and development of late rice. The purpose of this experiment is that through the treatment of different sowing dates, late rice grows and develops under different weather conditions,