红皮云杉人工林材性变异规律

在分析研究红皮云杉人工林主要材性的基础上，较为系统地研究了人红皮云杉纸浆材主要材性指标与林龄、林分密度和立地条件的关系。研究结果表明：红皮云杉木材纤维素含量较高（６７．１５％～８０．１０％）。纤维细长。长宽比达７０％以上，且人工林与天然林材性差异不大，是造纸的优良原料。红皮云杉人工林主要材性与林龄密切相关。而受林分密度和立地条件的影响较小。２０年生基本密度为０．３１７９ｇ／ｃｍ＾３，纤维长１．９９ｍｍ，长宽比７１．７８，综纤维素含量７１．５４％，１％ＮａＯＨ抽出物为２０．１０％，总的趋势是其材性植随林龄增大而增加。红皮云杉人工主要材性指标在２０年生后即达到造纸要求。

The Variation Pattem of Wood Nature for Picea koraiensis Plantation

Based on the analysis of the main wood feature. the relationship between the main wood feature indices of Picea koraiensis plantation and forest age. density and site condition was studied, The results show that Picea koraiensis plantations possess a higher fiber quantity of 67.15%-80.10%, thin-long fiber and rate between length and width of more than 70%. The wood feature of Picea koraiensis plantation is similar to that of nature forest, so Picea koraiensis plantation is excellent pulp material. The main wood features are closely related to forest age. and not closely to plantation density and site condition. For twenty-year-old Picea koraiensis plantation. the basic density is 0. 317 9 g/cm3. the fiber length is 1. 99mm, the brown fiber content is 71.54%. 1% NaOH out material is 20.10%, the rate between length and width is 71. 78%. The whole trend is that the values of wood feature indices increase with age. The main wood features of twenty-year-old Picea koraiensis plantation could meet the need of paper-making.