南繁工作是培育新品种不可缺少的关键环节 ,它可加快育种材料的世代选择 ,加快育种进度 ,缩短育种年限 ,还可以解决翌年生产中紧缺的原良种。每年都有数百家科研和种子单位南繁 ,由于海南特殊的地理位置和气候条件 ,南繁时会出现这样或那样的问题 ,给南繁单位造成一定的经济损 Nanfan work is an indispensable key step in cultivating new varieties. It can speed up the generation selection of breeding materials, speed up breeding progress, shorten the breeding period, and can also solve the shortage of original elite in the following year. There are hundreds of scientific research and seed units in the south each year. Due to the special geographic location and climate conditions in Hainan, problems of one kind or another occur in the south when there are some economic losses