南方四季杨不同树龄与基干位置材性性状研究  

Research on Correlations of Wood Quality Properties with Height Positions and Ages of Populus deltoide × P.nigra cv.Chile.Plants

作　　者：辜云杰[1] 钟林茂 罗建勋[1] 曹小军[1] 

机构地区：[1]四川省林业科学研究院,四川成都610081 [2]宜宾市林业局,四川宜宾644000

出　　处：《西南林学院学报》2007年第4期61-65,共5页Journal of Southwest Forestry College

基　　金：四川省林业科技"先导计划"(2005-24)资助项目

摘　　要：对四川省双流县生长的南方四季杨3，5，8，11年生样木基本材性进行分析研究，结果表明：不同年龄的木材基本密度、纤维长度、1％NaOH抽提物含量和壁腔比差异极显著；4个不同取材部位之间木材基本密度和纤维长度差异极显著；年龄×取材部位的交互效应在木材基本密度上差异显著，其余指标不存在年龄×取材部位的交互效应．木材材性性状随着年龄及取材部位的变化存在一定的变异规律：1％NaOH抽提物含量从3～8龄呈下降趋势，到11龄略有回升；壁腔比在3～8龄差异不大，而在11龄时，壁腔比有所增加；木材基本密度、纤维长度随年龄增加呈增大趋势；从树干下部到上部1％NaOH抽提物含量及基本密度呈增长趋势，木材纤维长度呈递减趋势，而壁腔比无明显规律可循，各部位壁腔比差异不大．Fundamental properties of the timber of Populus deltoide x P. nigra cv. Chile. grown in Shuangliu County, Sichuan Province were analyzed by randomly sampling 3,5,8 and 1 lyears old of specimen plants. The results showed that there were significant differences in the basic wood density, fiber length, extract content by 1% NaOH and the ratio between the thickness of cell wall layer and the cell diameter among different plant ages. It was showed that the differences in the basic wood density and fiber length among the 4 positions where the wood samples taken from the same plants, i. e. , 0 cm, 130 cm,1/2 and 2/3 heights of the sample trees. There was significant difference in the basic wood density caused by reciprocal interaction between age and the position where the wood specimen were sampled. There was no evident reciprocal interaction between age and sample height for other wood qualities. It was also proved that there was certain rule to show the difference in wood properties along with the change of tree ages and the positions of the specimen taken. The content of 1% NaOH extraction of wood descended from the 3 year old to 8 year old and began to increase at the 11 year old. There were no evident variations in the ratio between the thickness of cell wall layer and the cell diameter among the ages from 3 to 8 years old, while the ratio increased a little at the 11 year old. It was showed that the wood density and the fiber length increased with the increment of the age. The content of 1% NaOH extraction and the basic wood density increased, but the fiber length descended along with the increment of the height positions on the tree stem. There was no significant difference in the ratio between the thickness of cell wall layer and the cell diameter among the specimen sampled from different height positions.

关 键 词：南方四季杨 木材性状 年龄效应 位置效应 

分 类 号：S781.3[农业科学—木材科学与技术]