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近年来，为了抢先市场、扩大经营，很多种子公司开始组织人员去海南进行冬季玉米制种、扩繁、纯度鉴定和育种材料选育加代；但由于对海南冬繁的制约因素及技术特点缺乏了解，在繁种的产量、质量和安全性上都存在一些突出问题。笔者根据多年的南繁研究经验，就此加以探讨，以供
In recent years, in order to preempt the market and expand their business, many seed companies have begun to organize personnel to go to Hainan for winter seed production, propagation, purity identification and selection of breeding materials. However, due to lack of understanding of the restrictive factors and technical characteristics of winter in Hainan, , There are some outstanding problems in the mass production, quality and safety. According to many years of research experience of Fanfan, I will explore this for reference