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一、前言松脂生产量,在天然树脂中居首位,世界年产量约为200万t,是用途广泛的化工原料。目前虽然原料合成工业飞速发展,但还无法生产出代替松脂产品所具功能的产品,因此,松脂产品的需要持续增加,应用范围不断扩大,预计近年松香需要量将增加到350万t。所以,不仅在目前,而且在将来,对在森林中获得此种奇缺的化工原料都有着重要意义。根据美国专家计算,在森林经营的经济效益方面,即使是产脂力一般的林分,采脂收入要占营林总收入的47.4％,而高产脂林的单位面积纯收入则要比一般用于造纸材的收入高出1倍。
First, the introduction of rosin production, ranking first in the natural resin, the world annual output of about 2000000 t, is a widely used chemical raw materials. At present, although the raw material synthesis industry is developing rapidly, it is still not possible to produce products that replace the functions of rosin products. Therefore, the demand for rosin products continues to increase and its application range is constantly expanding. It is estimated that the demand for rosin will increase to 3.5 million tons in recent years. Therefore, not only for now but also in the future, it is of great importance to obtain such scarce chemical raw materials in the forest. According to U.S. experts, even in the economic profitability of forest management, the production of oil-for-fat stands accounts for 47.4% of the total revenue of silviculture, while the net income per unit area of high- Revenue from paper making is twice as high.