地黄,系玄生科地黄属多年生草本药用植物,以根茎入药,主要品种有金状元、小黑英、邢疙瘩、北京1号、北京2号等。我国南北广大地区均有栽培。喜凉爽气候,喜干燥,怕高温日灼。要求土层深厚、疏松,排水良好,pH值6.5～7.5的微酸至微碱性壤土或沙壤土为宜。忌连作,须经5年以上轮作后方能复种。 Rehmannia, Department of Xuan-sheng genus Rehmannia perennial herb medicinal plants to rhizome into medicine, the main varieties of gold champion, small black British, Xing pimple, Beijing No. 1, Beijing No. 2 and so on. China’s vast areas have cultivated both north and south. Like a cool climate, hi dry, afraid of high temperature sunburn. Requires deep soil, loose, well drained, pH 6.5 ~ 7.5 slightly acidic to slightly alkaline loam or sandy loam is appropriate. Avoid continuous cropping, subject to more than 5 years after the rotation can be multiple cropping.