牛黄是常用的名贵药材。在李时珍著的《本草纲目》中指出,牦牛的牛黄为牛黄中的正宗品种。天然牛黄的来源稀缺,产量极少,所以价格昂贵。为了扩大天然牛黄的生产途径,我国许多科技工作者,探索在牛体胆 Bezoar is commonly used expensive herbs. In Li Shizhen’s “Compendium of Materia Medica” pointed out that the yak’s bezoar is the authentic variety of bezoar. The source of natural bezoar scarcity, yield very little, so expensive. In order to expand the production of natural bezoar, many scientific and technological workers in our country explore