中国药典规定药用杜仲为杜仲科植物杜仲Eucommia ulmoides Oliv.刮去粗皮的树皮。由于杜仲树资源不足,药用杜仲已满足不了市场需求。为扩大药源,有人对杜仲环剥取皮进行了实验研究,並获得成功。此后有些学者对其叶,嫩枝进行了化学、药理等方面的研究。目前仍有相当部分采取伐树取皮的做法,对其 The Chinese Pharmacopoeia stipulates that medicinal Eucommia ulmoides is bark of Eucommia ulmoides Oliv. Due to lack of resources of Eucommia ulmoides, medicinal Eucommia has not met the market demand. In order to expand the source of medicine, some people carried out experimental research on Eucommia circumcision and succeeded. Since then, some scholars have studied the leaves and twigs in chemistry and pharmacology. There is still a considerable part of the practice of harvesting and harvesting trees.