邓恩桉木材基本密度与解剖特性的相关性分析

摘要

为揭示邓恩桉(Eucalyptus dunnii)木材材性变异规律,以广西沙塘林场邓恩桉为研究对象,系统测量了基本密度和解剖特性指标,用数理统计方法,对所测数据进行全面分析和比较.结果表明:基本密度和5个解剖参数的径向变异由髓心向外先迅速递增,而后趋于平缓或降低;年轮宽度除外,其余5个参数在株内径向和株间差异均达到极显著水平(P＜0.01);壁腔比除外,其余纤维指标均达到优良造纸用材的要求;幼龄材与成熟材的界限为8～10年;多项式方程能较好地描述基本密度与解剖各项参数和树木年轮的相关关系.%In order to reveal the variation regularities of Eucalyptus dunnii, the basic density and anatomical properties indexes of E. dunnii in Guangxi Shatang forest farm have been measured and the data were analyzed and compared by means of mathematical statistics. Results indicated that basic density and 5 radiation varia-tions of anatomical characteristics increased rapidly at first and then gentlely increased or reduced from pinch to outward. The variation of 5 parameters except for growth ring width showed highly significant differences within trees and among trees. The indexes of fiber quality traits but fiber wall-lumen reached requirement for paper making. The boundary line of juvenile wood and mature wood was from 8-year-old to 10-year-old. Poly-nomial equations can be could to describe the relationship between basic density and anatomical parameters as well as tree rings.