茶多酚对红茶品质的形成具有密切相关性。云南大叶种鲜叶中含有丰富的茶多酚,是适制红茶的优良茶树品种。我省自1956年开始从云南、凤庆等地引种云南大叶种,由于两地自然条件的类同,适应性能良好,从引种到推广,发展迅速。逐步成为我省占总面积50%的当家品种,以此原料创制的“金帆牌”英德红茶誉满海内外。然而,云南大叶种群体性状复杂,类型差异大,妨碍着品质的提高,而且由于大叶品种的特性,抗寒性较弱,限制着适宜区域,北移困难,致使我 Tea polyphenols is closely related to the formation of black tea quality. Yunnan big leaf fresh leaves are rich in polyphenols, is an excellent tea varieties of tea. Since 1956, our province has introduced Yunnan big leaf species from Yunnan and Fengqing. Due to the similar natural conditions of the two places, our province has good adaptability and has developed rapidly from introduction to popularization. Gradually become the province of the total area of ​​50% of the original varieties, as the raw materials created by the “Jinfan card” Yingde black tea reputation at home and abroad. However, the population traits of large-leaf species in Yunnan are complex and their types are different, which hinders the improvement of their quality. Due to the characteristics of large-leaved varieties, their cold resistance is weak, restricting the suitable area and moving north, causing me