论文部分内容阅读
木材性质的变异可使木材在加工过程中产生一系列问题,尤其是速生的人工林。围绕这一主题,美国中北部林业试验站的专家们开始了树龄和环境条件对木材性质影响的研究。初期工作主要是对针叶树材强度、加工性能受营林作业影响的研究,然后是评价营林作业对阔叶树材材质影响的研究,其中一个主要内容是造林作业对阔叶树材密度的影响,木材密度是木材加工的一个主要特性标志。
Variation in the nature of the wood can cause a series of problems in the processing of wood, especially in fast-growing plantations. Around this theme, experts from the North Central Forest Experiment Station began a study of the effects of tree age and environmental conditions on wood properties. The initial work mainly focuses on the research on the influence of the strength and processing performance of conifers on silviculture operations, and then on the effects of silviculture on the materials of broad-leaved trees. One of the main contents is the effect of afforestation on the density of broad-leaved trees. The density of wood is One of the main characteristics of wood processing signs.