Branch thickness in unthinned stands of Sitka spruce(Picea sitchensis(Bong.) Carr.)
作者:
J. P. Skovsgaard,
期刊:
Scandinavian Journal of Forest Research
(Taylor Available online 1988)
卷期:
Volume 3,
issue 1-4
页码: 241-251
ISSN:0282-7581
年代: 1988
DOI:10.1080/02827588809382512
出版商: Taylor & Francis Group
关键词: Picea sitchensis;no‐thinning regime;spacing;branch thickness
数据来源: Taylor
摘要:
Results of branch measurings in unthinned stands of Sitka spruce in Denmark are presented. Three different measures of branch thickness are discussed in relation to visual grading of structural timber. On basis of the average thickest branch 5.0 m above ground it is recommended not to let spacing exceed 1.8x1.8 m‐2.0x2.0 m at establishment. Since Sitka spruce branches react profusely when spacing widens, this is the upper limit, presupposing a no‐thinning regime. With reference to the literature, the same recommendation can be given on basis of machine stress gradings.
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