Skip to Main Content
Effects of silviculture and genetics on branch/knot attributes of coastal Pacific Northwest Douglas-fir and implications for wood quality--a synthesisAuthor(s): Eini C. Lowell; Douglas A. Maguire; David G. Briggs; Eric C. Turnblom; Keith J.S. Jayawickrama; Jed Bryce
Publication Series: Scientific Journal (JRNL)
Station: Pacific Northwest Research Station
Download Publication (0 B)
DescriptionDouglas-fir is the most commercially important timber species in the US Pacific Northwest due to its ecological prevalence and its superior wood attributes, especially strength and stiffness properties that make it highly prized for structural applications. Its economic significance has led to extensive establishment and management of plantations over the last few decades. Cultural treatments and genetic improvement designed to increase production of utilizable wood volume also impact tree morphology and wood properties. Many of these impacts are mediated by crown development, particularly the amount and distribution of foliage and size and geometry of branches. Natural selection for branch architecture that optimizes reproductive fitness may not necessarily be optimal for stem volume growth rate or for wood properties controlling the quality of manufactured solid wood products. Furthermore, Douglas-fir does not self-prune within the rotation lengths currently practiced. This paper synthesizes extensive Douglas-fir research in the Pacific Northwest addressing: (1) the effects of silviculture and genetics on branch structure and associated consequences for wood quality and the product value chain; and (2) methods to measure, monitor, modify, and model branch attributes to assist managers in selecting appropriate silvicultural techniques to achieve wood quality objectives and improve the value of their Douglas-fir resource.
- Visit PNW's Publication Request Page to request a hard copy of this publication.
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
CitationLowell, Eini C.; Maguire, Douglas A.; Briggs, David G.; Turnblom, Eric C.; Jayawickrama, Keith J.S.; Bryce, Jed. 2014. Effects of silviculture and genetics on branch/knot attributes of coastal Pacific Northwest Douglas-fir and implications for wood quality--a synthesis. Forests. 5: 1717-1736.
KeywordsDouglas-fir, wood quality, silviculture, branch, genetics
- Estimating upper stem diameters and volume of Douglas-fir and Western hemlock trees in the Pacific northwest
- Wood productivity of Pacific Northwest Douglas-fir: estimates from growth-and-yield models.
- The rise and fall of the Pacific Northwest log export market.
XML: View XML