广东每年冬春之间,天气变化无常,特别是2月中、下旬,常出现一个较恒定的湿冷天气,日照不足,持续时间常达十多天,水稻秧苗机能大大削弱或已受冻害,再到寒潮转暖时,温度急剧上升,日极端最低温则相反,往往降到比寒潮期间的最低温还低,昼夜相差悬殊,使已受害的秧苗无法适应,产生大量死苗烂秧,成为广东早稻生产上的一个重要问题。为了解决这个问题,曾采用过芒萁 Between winter and spring in Guangdong, the weather is volatile. Especially in mid-to-late February, a relatively constant cold and wet weather often occurs. Sunshine is insufficient and the duration often lasts more than 10 days. The rice seedling function is greatly weakened or has been damaged by frost damage. To the warming of the cold, the temperature rose sharply, the daily extreme low temperature is the opposite, often down to the lowest cold during the cold is also low, day and night disparities, so that victims of seedlings can not adapt to produce a large number of dead seedlings rotten seedlings become Guangdong An important issue in early rice production. In order to solve this problem, it has been used Manchu