Impact of precommercial thinning on tree growth, lumber recovery and lumber quality in Abies balsamea

Autor:	Queju Tong, Gilles Chauret, S. Y. Zhang
Rok vydání:	2009
Předmět:	Animal science genetic structures biology Thinning Forestry biology.organism_classification eye diseases Silviculture Abies balsamea Mathematics
Zdroj:	Scandinavian Journal of Forest Research. 24:425-433
ISSN:	1651-1891 0282-7581
DOI:	10.1080/02827580903124392
Popis:	Precommercial thinning (PCT) is often used to improve stand growth and value. While PCT may accelerate tree growth and reduce mortality, it may also have a negative effect on product quality. This study examined the effect of moderate and heavy thinning on tree growth, lumber recovery and quality in a natural balsam fir [Abies balsamea (L.) Mill.] PCT trial 35 years after thinning. Compared with the control, the heavy thinning increased merchantable tree diameter, stem volume per tree and lumber volume recovery per tree by 41.1%, 100.9% and 92.7%, respectively, reduced the Select Structural grade (the best grade) recovery by 33.7%. Thinning did not affect the no. 2 and better grade yield. There was a 12.2% and 15.0% difference, respectively, in the lumber bending modulus of elasticity (MOE) and modulus of rupture (MOR) between the control and heavy thinning. Moderate thinning had little impact on the visual grade recovery, lumber bending MOE and MOR. Heavy thinning is recommended if the goal is t...
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::13ae28cb3af9d6c106f1eba21846765f https://doi.org/10.1080/02827580903124392 Zobrazit plný text záznamu Plný text ve formátu PDF Plný text ve formátu HTML
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