合理造材的原则是“长材不短造,优材不劣用,量材下锯,材尽其用”。但在国营林场木材生产过程中,贯彻这个原则时却有很多技术问题需要研究。几年来,我们根据林场造材中出现的:材长不准、材种出材率低、经济材等级率低(以下简称三率),而直接影响木材销价等问题进行了调查分析。我们感到这三率的提高将直接影响国营林场木材使用价值和经济效益,也直接关系到林 The principle of reasonable material is “not long made of long products, non-inferior material is not good, the amount of material under the saw, the best use of materials.” However, there are many technical problems to be studied in carrying out this principle in the production of state-owned forest timber. In the past few years, we conducted a survey and analysis according to the problems that occur in forest farm materials: the length of timber is not allowed, the timber is low, the grade of economic timber is low (hereinafter referred to as the “three rates”), and the timber price is directly affected. We feel that the increase of these three rates will directly affect the value and economic benefits of the use of timber in state-owned forest farms and is directly related to the forest