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杜仲(Eucommia ulmoides Oliv)是众所周知的优良经济树种。在甘肃自然分布于嘉陵江上游白龙江下游和小陇山林区,其中以天水、徽县、成县、两当、武都、康县及文县较多,垂直分布于海拔560～1500米。可是,目前陇南一些地方在杜仲的经营利用上存在许多不合理的做法。如伐树剥皮,一株生长旺盛的壮令树,采剥一次就枯死,这是“杀鸡取卵”的做法。面对资源不足的现状,解决供需矛盾,建议采用分期剥皮法。即每年在一株树干的不同方向上采剥一部分树皮。剥
Eucommia ulmoides Oliv is a well-known fine economic species. In Gansu, it is naturally distributed in the lower reaches of Bailongjiang and Xiaolongshan forest areas in the upper reaches of Jialing River. Among them, Tianshui, Huixian, Chengxian, Liangdang, Wudu, Kangxian and Wenxian counties are mostly vertically distributed at altitudes of 560-1500 meters. However, there are many unreasonable practices in the operation and utilization of Eucommia in some places in Longnan. Such as deforestation, a strong growth of the strong tree, mining stripping once dead, this is “killing the chicken” approach. Faced with the current situation of insufficient resources, to solve the contradiction between supply and demand, it is recommended to adopt the staging method. That is, a part of bark is harvested every year in different directions of a tree trunk. peel