青海省达坂山地区的陇蜀杜鹃(Rhododendron przewalskii)是一种极有价值的药用植物,本文对陇蜀杜鹃叶中有效成分总黄酮、杜鹃毒素、鞣质含量与季节变化关系进行了研究。结果,鞣质含量为8.31～10.80%,二至五月较高;杜鹃毒素含量为0.06～0.1%,三至六月较高;黄酮含量为2.10～2.64%,六至九月较高。 Rhododendron przewalskii is an extremely valuable medicinal plant in Dalaishan area of ​​Qinghai Province. The relationship between the contents of total flavonoids, rhododendrons, and tannins and the seasonal changes of the effective components in the leaves of Azalea was studied. As a result, the tannin content was 8.31 to 10.80%, which was higher from May to May; the content of rhododendron toxin was 0.06 to 0.1%, which was higher from March to June; the content of flavonoids was 2.10 to 2.64%, which was higher from June to September.