摘要
以微密度分析对１９ 个种源杉木的木材密度径向变异模式进行了研究。不同种源间和种源内株间，年轮平均密度的径向变异曲线都存在一定的变异，但此变异主要表现在种源内株间。年轮平均密度的幼龄—成熟相关性从第３ 年起就极显著。由微密度分析得出的一系列密度和年轮宽特征值间的相关分析表明，在年龄影响下的变异过程中，年轮内密度变异曲线随年轮宽的变动导致晚材率变动的效应较为显著，年轮平均密度主要受晚材率影响；年轮平均密度与年轮宽呈特别显著的负相关。而在种源影响下的变异过程中分析，上述效应不明显，而不同种源间密度变异曲线的上下移动影响显著；年轮平均密度主要受早材平均密度影响；
The radial variation patterns of wood density in 19 Chinese fir provenances were studied by means of X\|ray wood densitometry. There existed a certain degree of variation in the radial variation patterns of average ring density among provenances and among individual trees within provenances. However the variations were shown mainly among individual trees. After third year,the correlation between juvenile and mature of average ring density reached the significance of 0.001 levels. The analysisy of the correlations between the characters from wood densitometry showed that (1) in the case of the correlations with the variation resulting from the change in ages, the effect of the change in ring width on latewood percentage was significant, and therefore the average ring density was highly significantly correlated to latewood percentage, and the negative correlation between ring width and average ring density also was highly significant; (2) in the case of the correlations with the variation resulting from the change in provenances, the effect mentioned above was less significant, and the average ring density was highly singificantly correlated to the earlywood density, and the negative correlation between ring width and average ring density was much less significant.
出处
《林业科学》
EI
CAS
CSCD
北大核心
1999年第6期86-92,共7页
Scientia Silvae Sinicae
基金
林业部世界银行贷款"森林资源发展及保护"项目
关键词
木材密度
径向变异模式
杉木
种源
Wood density
Radial variation pattern
Chinese fir
Provenance
