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### 木材材性株内径向变异模式初探Ⅵ19个杉木种源木材密度径向变异模式的研究

1. 1. 中国林业科学研究院木材工业研究所 北京100091
2. 广西柳州地区林科所 融水 545300
• 收稿日期:1998-09-28 出版日期:1999-11-25 发布日期:1999-11-25

### PRELIMINARY STUDIES ON THE RADIAL VARIATION PATTERNS OF WOOD PROPERTIES WITHIN TREES V I STUDIES ON THE RADIAL VARIATION PATTERNS OF WOOD DENSITY IN 19 CHINESE FIR PROVENANCES

Xiuqin Luo1,Ning Guan1,Xiaoming Wen1,Wuming Luo2

1. 1. Research Institure of Wood Industry, CAF Beijing100091
2. Guangxi Liuzhou Research Institute of Forestry Science Rongshui545300
• Received:1998-09-28 Online:1999-11-25 Published:1999-11-25

Abstract:

The radial variation patterns of wood density in 19 Chinese fir provenances were studied by means of Xray 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.