The variation of the basic density within the juvenile wood of Sitka spruce (Picea sitchensis)
作者:
Claes Harvald,
PerOle Olesen,
期刊:
Scandinavian Journal of Forest Research
(Taylor Available online 1987)
卷期:
Volume 2,
issue 1-4
页码: 525-537
ISSN:0282-7581
年代: 1987
DOI:10.1080/02827588709382488
出版商: Taylor & Francis Group
关键词: Picea sitchensis;Picea abies;juvenile wood;basic density;ring width;ring number;stem height;stand quality;stem cracks
数据来源: Taylor
摘要:
The variation in the basic‐density level of 45 stems of Sitka spruce from two Danish sites has been examined. It is shown that the basic‐density level, i.e. the basic density as a function of ring width, within the juvenile wood decreases with (1) increasing distance from the pith and (2) increasing height in the stem (same ring number from pith provided). Furthermore, the basic‐density level seems to decrease with increasing stand quality, which may affect the pattern of variation in basic‐density level if the stand quality class varies with age. The basic density of the juvenile wood is markedly higher in Sitka spruce than in Norway spruce, whereby the risk of stem cracks probably is reduced.
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