Variation in sapwood thickness ofPicea abiesin Estonia depending on the tree age
作者:
Arne Sellin,
期刊:
Scandinavian Journal of Forest Research
(Taylor Available online 1991)
卷期:
Volume 6,
issue 1-4
页码: 463-469
ISSN:0282-7581
年代: 1991
DOI:10.1080/02827589109382683
出版商: Taylor & Francis Group
关键词: Norway spruce;sapwood thickness;heartwood ¡formation;index of vigour;crown class
数据来源: Taylor
摘要:
Variation of sapwood thickness in terms of a linear measurement and a growth ring count with reference to the age was studied in dominant and suppressed Norway spruce trees. In the trees of both dominance classes the sapwood thickness increased in absolute terms, while its relative portion decreased with the age of the trees growing. Great differences were found in sapwood thickness between dominant and suppressed trees in linear measurements but not in the number of sapwood rings or the rate of the heartwood formation. The number of sapwood growth rings reached 40 in old trees. The index of vigour differed considerably in dominant and suppressed trees.
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