林副产品可多至以百计,其中大部分属于以下类型:树胶、树脂、香脂、乳胶等形式的树木分泌物;药材;染料;食用坚果;香精油;木本油料;香料;丹宁以及昆虫分泌物。另一种类型是松香、松节油及其衍生物。在热带地区,林副产品的种类更多。虽说是副产品,但其每年的经济价值总额却不亚于木材。从某种角度看,虽然天然产品有 There can be as many as 100 by-products of forest by-products, most of which fall into the following categories: tree exudates in the form of gums, resins, balms, latex, etc.; medicinal herbs; dyes; edible nuts; essential oils; woody oils; spices; tannins and insects Secretions. The other type is rosin, turpentine and its derivatives. In the tropics, there are more forest byproducts. Although it is a by-product, its annual economic value is no less than wood. From a certain point of view, although natural products have