长白落叶松木材材性株内变异  

The Variation of Wood Properties within Individual Trees for Larix olgensis

作　　者：段喜华 张含国 潘本立 周显昌 袁桂华 王维臣 蒋雪斌 

机构地区：[1]黑龙江省林业科学研究所 [2]黑龙江省林口县青山林场

出　　处：《东北林业大学学报》1997年第2期33-36,共4页Journal of Northeast Forestry University

基　　金：国家"八五"攻关项目

摘　　要：以３０年和５４年生长白落叶松人工林为样本，对木材材质性状的株内变异进行了分析。试验结果表明：①由树干基部至树梢，基本密度逐渐减少，管胞长度先逐渐增加，达最大值后逐渐缩短；②由髓心至形成层，基本密度、管胞长度迅速增大，至第２０轮后增幅变小；③用胸高处任一半径方向的基本密度和管胞长度可以估算树干平均值；④胸高木芯法为合理的。The variations of wood properties within individual trees were studied for artificial stands of Larix olgensis at age of thirty and fifty-four. The basic density progressively decreased from the base to the top of trunks. The lengths of trachied increases progressively and become short step by step when it reaches the longest. The basic density and trachied length increases rapidly to the 20 rings from the pith to the cambium of trees. and then the increase exient become smaller. The basic density and trachied length at any radius orientation of breast height was used to estimate means of trunks. The method of timber wick is reasonable and practical sampling methods.

关 键 词：长白落叶松 木材性状 株内变异 取样 

分 类 号：S781[农业科学—木材科学与技术]