地黄RehmanniaglutinosaLibosch.为常用中药,由于该植物为高度杂合体,自交不亲和,杂交后代严重分离,多代营养繁殖又易造成病毒侵染,生产中普遍反映品种退化严重,产量低而不稳。笔者通过多年的生产实践,总结出防止或减轻地黄优良品性退化的方法,现报道如下。1　筛选具有优良品性 Rehmannia glutinosaLibosch is commonly used traditional Chinese medicine, because the plant is highly heterogeneous, self-incompatibility, severe segregation offspring, multi-generational breeding and easy to cause virus infection, production generally reflects the serious degradation of varieties, low yield and instability . The author through many years of production practice, summed up to prevent or reduce the degradation of Rehmannia good method, are reported below. 1 screening with good character