杜仲(Eucommia ulmoides Oliver.)树皮是贵重药材,叶也可供药用。树体除木质部外均含桃叶珊瑚甙及硬性橡胶,叶还含山奈醇,咖啡酸、绿原酸、酒石酸及还原醇等。杜仲有强筋骨,补肝肾,益腰膝,除酸痛,活小便余沥、阴下痒湿、高血压及安胎强壮等作用。提炼的硬性胶耐酸碱,适用于航空工业及电工绝缘材料,还可作高级粘合剂。木材色白致密,无心边材之分,是建 Eucommia ulmoides Oliver. The bark is a valuable medicinal plant, leaves are also available for medicinal use. In addition to the xylem trees are aucubin and hard rubber, leaves also contain mountain nai, caffeic acid, chlorogenic acid, tartaric acid and reducing alcohol. Eucommia has strong bones and muscles, liver and kidney, benefit waist knees, in addition to soreness, live urinate Yu Li, genital itching wet, high blood pressure and tocolysis and so on. Refined hard acid acid and alkali, applicable to the aviation industry and electrical insulation materials, but also for advanced adhesives. Wood color white dense, careless sapwood points, is built