杜仲树是一种常用的药用植物,树皮可供药用,很有经济价值。陕西省周至县楼观公社周一大队在1958年曾栽植了250多亩,经过20多年的精心培育,已有一万多棵成材。为了提高杜仲树皮的回收率和再生能力,应用环剥再生取皮的方法取得一定的成效。现将作法要点介绍如下:一、抓好时机,定时取皮:夏至后至立秋前,是杜仲树内汁液最饱满,形成层生长旺盛阶段,取皮最为适宜。若错过时机,将会造成新皮不再生或再生很慢。二、掌握气候,加强保护:取皮时间应选 Eucommia ulmoides is a commonly used medicinal plant. Bark is available for medicinal purposes and is of great economic value. Zhouzhi County, Shaanxi Province, Louguan commune Zhou Brigade planted more than 250 acres in 1958, after more than 20 years of meticulous cultivation, there are more than 10,000 trees. In order to improve the recovery and regeneration capacity of bark of Eucommia ulmoides, girdling was used to obtain certain results. The main points of the present method are described as follows: First, grasp the timing, regular skin: from the summer solstice to the beginning of autumn, the eucommia tree is the most full of sap, the formation of a strong layer of growth, the skin is most suitable. If you miss the opportunity, it will cause the new skin to not regenerate or regenerate slowly. Second, grasp the climate, strengthen protection: picking time should be selected