大多数木本植物的树皮,一般指维管形成层以外的部分,有保护植物体不受微生物侵害、防止水分过分蒸发、运送和储存有机养料等方面的功能。它在植物体的生命活动中有着非常重要的作用。通常对树干大面积环状剥皮,可造成整株植物的死亡。中药材杜仲是杜仲科植物(Eucommia ulmoides oliv.)的干燥树皮。过去多用伐树取皮或条状剥皮的方法采收,药材产量低,也影响了林药结合和药材生产的发展,致使长期不能满足药用需要。近年来,青岛市园林处在果树环剥 The bark of most woody plants generally refers to parts other than the vascular cambium, which protects the plant from microorganisms, prevents excessive evaporation of water, transports and stores organic nutrients. It has a very important role in the life activities of plants. The large area of ​​the tree trunk is often stripped and can cause the death of the entire plant. Eucommia ulmoides oliv. is the dry bark of Eucommia ulmoides oliv. In the past, more methods were used for harvesting by peeling or stripping. The low yield of medicinal materials also affected the development of the combination of forest medicine and the production of medicinal materials, resulting in the inability to meet medical needs in the long term. In recent years, the gardens of Qingdao City have been in fruit tree girdling