杜仲是一种常用的药用树种，多年来供不应求，价格也不断上涨。为了提高杜仲皮回收率，必须采取科学剥皮方法。（一）剥皮条件再生剥皮一般要求树龄在10年以上，树高5米左右，胸径10厘米以上。（二）操作要点从树干剥皮部分的上、下两端各环周割一刀，深至木质部，再在两环割口 Eucommia is a commonly used medicinal tree species, over the years in short supply, prices are rising. In order to improve the recovery of Eucommia bark, we must adopt a scientific method of skinning. (A) skinning conditions Skinning regeneration usually require more than 10 years in age, tree height of about 5 meters, diameter more than 10 cm. (B) points of operation From the trunk skinning part of the upper and lower ends of each ring cut a knife, deep xylem, and then in the two ring cut