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地黄又名生地。系玄参科多年生草本植物,药用部位为植物根茎.因加工使用方法不同而分为三种:(1)生地,有凉血、止血、滋养作用;(2)熟地,有滋养、补血作用;(3)鲜生地,有清热、凉血、止血作用。野生地黄根茎细长,经人工驯化栽培的家种品种根茎肥大。家种地黄有怀庆地黄和杭州笕桥地黄两种。河南新乡地区生产的怀庆地黄产量高、质量好,栽培面积较广,主要品种有金壮元、四只猫、小黑叶等。上海地区栽培的大多从该地引入。
Rehmannia also known as habitat. Department of Scrophulariaceae perennial herbs, medicinal parts of the plant rhizome.Due to the use of different processing methods are divided into three kinds: (1) habitat, with cooling blood, bleeding, nourishing effect; (2) Rehmannia, nourishing, blood effects ; (3) fresh, with heat, cooling blood, bleeding effect. Wild Rehmannia rhizome slender, cultivated by artificial domesticated varieties of rhizome hypertrophy. There are two kinds of yellow Huang Huaiqing and Hangzhou Huangqiao Rehmannia. Huaiqing Rehmannia produced in Xinxiang, Henan Province has high yield, good quality and wide cultivation area. The main varieties are Jinzhuangyuan, four cats, black leaf and so on. Most cultivated in Shanghai from the introduction.