木材材性株内径向变异模式初探──Ⅲ.种植密度对湿地松、火炬松木材密度径向变异模式的影响  

PRELIMINARY STUDIES ON RADIAL VARIATION PATTERNS OF WOOD PROPERTIES WITHIN TREES-Ⅲ.STUDIES ON THE EFFECT OF TREE SPACING ON THE RADIAL VARIATION PATTERNS OF WOOD DENSITY IN SLASH PINE AND LOBLOLLY PINE

作　　者：文小明[1] 骆秀琴[1] 管宁[1] 宋云民[2] 潘志刚[2] 

机构地区：[1]中国林业科学研究院木材工业研究所,北京100091 [2]中国林业科学研究院林业研究所,北京100091

出　　处：《林业科学》1996年第6期536-542,共7页Scientia Silvae Sinicae

基　　金：林业部世界银行贷款国家造林项目

摘　　要：对两个地区不同种植密度的湿地松、火炬松进行了微密度分析，研究了种植密度对木材密度径向变异模式的影响。主要结果是：种植密度对湿地松和火炬松各密度特征值径向变异模式的影响，主要表现在变异曲线平均水平高低的变动，而对变异曲线形状的影响并不显著。种植密度对湿地松和火炬松各年轮宽特征值径向变异模式的影响，主要表现在年轮宽度RW和早材宽度EW变异曲线平均水平高低的变动和RW、EW与晚材宽度LW变异曲线形状的变动。种植密度对年轮密度RD的影响从年轮内宽度和年轮密度变异曲线平均水平高低两个方面起作用，出现较复杂的情况，并非所有情况下都是单调的正相关。The radial variation patterns of wood density in Pinus elliottii and Pinus teada planted with different tree spacing in Hunan Province and Jiangsu Province were studied by x-ray wood densitometry. The main results obtained are: 1 ) Tree spacing affected the radial variation patterns of wood density components mainly on their average levels but insignificantly on the shape of density curves. 2) Tree spacing made significant effects on the average levels of the ring width curves and earlywood width curves, and the shape of ring width curves, earlywood width curves, and latewood width curves. 3) In the light of the results from loblolly pine, tree spacing influenced average ring density in two ways: to change the average level of the intraring density curves and to change the ring width so that it is not always ture that there is a monotonous negative correlation between tree spacing and wood density.

关 键 词：木材密度 径向变异模式 种植密度 湿地松 火炬松 

分 类 号：S781.31[农业科学—木材科学与技术]