海南常年气温高,湿度大,是内地加代繁种的最佳天然基地,但是,海南除了有利的一面,也有不利的一面,凡从事南繁的人员到海南后都要面临的现实情况是:害虫不分代,草比种苗长得快。疾风骤雨加病害,老鼠、蚂蚁吃种快。部分育种单位和个人不止一次地经历过严重的病虫、杂草、鼠蚁危害而造成下播材料绝收的尴尬事件。经过多次研究和反复试验研究出的“南繁 Hainan perennial high temperature and humidity, is the best addition to the mainland’s natural breeding base, however, Hainan, in addition to the positive side, there are disadvantages, all those engaged in Fanfan to Hainan after the reality must be faced are: pests No generation, the grass grows faster than the seedlings. Blast and disease, mice, ants eat fast. Some breeding units and individuals have experienced more than once the serious pests, weeds, rat ants harm caused by the embarrassment of broadcast material received. After repeated research and trial and error developed ”Nan Fan