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人工林杨树木材密度变异规律的研究
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摘要:
以生长在3种滩地类型下3个无性系杨树为研究对象,用微密度的测定方法对人工林杨树木材密度径向和纵向变异规律进行了研究。结果表明,3个滩地类型间的杨树木材密度差异不显著,而不同无性系间和不同高度间木材密度差异显著。3个杨树无性系株内木材密度的径向变异有3种模式,即由髓心向外木材密度逐渐增加,由髓心向外木材密度逐渐递减和由髓心向外木材密度先降低,到一定年龄后再增加,但以由髓心向外木材密度逐渐递减为主要模式。3个杨树无性系株内木材微密度的纵向变异规律为自基部沿树干向上逐渐增大,到了最大值之后,再向上又略有减小。
关键词:  滩地 人工林 杨树 木材密度 变异规律
DOI:
修订日期:2003-04-22
基金项目:国家攀登计划;;
Variation Patterns of Wood Density in Plantation Poplar
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Abstract:
The variation patterns of wood density of plantation poplar trees in 3 clones grown in 3 different beaches (Anhui Province,Hubei Province and Hunan Province) were studied.The results indicated that density variation in different Changjiang beaches is not significant, but significant in 3 different clones and 3 different tree heights. The radial variation pattern of wood density of 3 clones decreases from pith outward. The axial variation of density increases gradually from base upward,and decreases less after its maximum peak.
Key words:  plantation poplar of beaches,wood density,wood variation

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