种子繁育。中草药用种子繁育最为普遍。种子繁育技术简便,利于引种驯化和新品种培育。但是,种子繁育的后代容易产生变异,开花结果较迟,尤其是木本中草药用种子繁育所需年限很长。所以,要发展药用植物良种繁育,一是加速繁育新的优良品种,以便更换老品种;二是保持新品种的优良性,防止混 Seed breeding. Herbal seed breeding is the most common. Seed breeding technology is simple, conducive to the introduction and domestication and cultivate new varieties. However, offspring of seed breeding prone to mutation, flowering later, especially for Chinese herbal medicine seed breeding long life expectancy. Therefore, to develop the breeding of medicinal plants, one is to speed up the breeding of new fine varieties in order to replace the old varieties; the second is to maintain the good nature of new varieties to prevent mixed