Variability of Wood Color in Paper Birch in Québec
Keywords:
<i>Betula papyrifera</i> Marsh, sapwood, discolored wood, colorimetry, color scannerAbstract
Color variability of paper birch (Betula papyrifera Marsh.) wood at the tree level was examined in this article. Tree age, dimension, and vigor were expected to influence the proportion of discolored wood in paper birch boards; older, larger, and less vigorous trees were assumed to produce boards with higher proportions of discolored wood. The color analysis was performed on approximately 2250 boards produced from 168 paper birch trees harvested in two different stands from which only logs of sawing quality were used. An industrial scanner was used to digitize the boards and obtain colorimetric information. Results show that tree diameter and vigor significantly influenced the proportion of discolored wood in boards, whereas the effect of tree age did not have a significant influence in the model. An average area of 32.4% of discolored wood was obtained when considering all boards. Less vigorous trees showed a mean area of 45.32%, whereas middle-vigor and most-vigorous trees had mean areas of 30.78 and 15.47%, respectively. The colorimetric values were mainly affected by tree age and diameter, but these effects were variable for every colorimetric parameter. The analysis of the random effects demonstrated that most of the total random variance of the dependent factors came from the between-board, between-tree, and, to a lesser extent, between-log variation. These findings suggest that favoring shorter rotations would help produce trees with lower proportions of discolored wood.References
Allen E (1996) Decay and wood utilization problems in red alder and paper birch. Pages 139 - 146 in Proc Ecology and Management of B. C. Hardwoods Workshop, Richmond, BC, 1 - 2 December 1993. PG Comeau, GJ Harper, ME Blach, JO Boateng, DT Keith, eds. Ministry of Forests, Victoria, BC.nBasham JT (1991) Stem decay in living trees in Ontario's forests: A users' compendium and guide. For. Can., Ont. Region, Sault Ste. Marie, Ont. Inf. Rep. 0-x-408. 69 pp.nBelleville B, Achim A, Cloutier A (2008) Analyse de la distribution et des sources d'initiation du cœur rouge à l'intérieur des tiges de bouleau à papier. Note de recherche N°.27. Centre de Recherche sur le Bois, Faculté de Foresterie et de Géomatique, Université Laval. 2 pp.nBelsey DA, Kuh E, Welsch RE (1980) Regression diagnostics: Identifying influential data and sources of collinearity. John Wiley & Sons, New York, NY.nBoulet B (2005) Défauts externes et indices de la carie des arbres: Guide d'interprétation. Ministère des Ressources Naturelles et de la Faune du Québec, Quebec, Canada. 291 pp.nCampbell WA, Davidson RW (1941) Red heart of paper birch. J Forestry 39(1):63-65.nCaron M (2005) BorealScanTM: CRIQ's endline achievement in vision and process optimisation technologies. In The 11th International Conference on Scanning Technology and Process Optimization for the Wood Industry (ScanTech), 25-26 July 2005, Las Vegas, NV.nEisner NJ, Gilman EF, Grabosky JC (2002) Branch morphology impacts compartmentalization of pruning wounds. J Arboric 28(2):99 - 105.nGiroud G, Cloutier A, Alteyrac J (2008) Occurence, proportion and vertical distribution of red heartwood in paper birch. Can J Res 38(7):1996 - 2002.nGosselin J (2002) Guide de reconnaissance des types écologiques—Région écologique 4b—Coteaux du réservoir Cabonga—Région écologique 4c—Collines du Moyen-Saint-Maurice, Ressources Naturelles et faune Québec, N° de publication: 2002 - 3030.nGrekin M (2007) Color and color uniformity variation of Scots pine wood in the air-dry condition. Wood Fiber Sci 39(2):279 - 290.nHallaksela AM, Niemisto P (1998) Stem discoloration of planted silver birch. Scand J Fr Res 13(2):169 - 176.nNormand D (2004) Évaluation de stratégies de séchages de sciages de bouleaux blancs courts de qualité ‘régulier.’ Projet no. 3659. Forintek Canada Corp. 36 pp.nPetro FJ, Calvert WW (1976) La classification des billes de bois francs destinées au sciage. Forintek Canada Corp., Ottawa, ON, Canada. 66 pp.nSAS (2003) SAS version 9.1. Statistical software. SAS Institute, Cary, NC.nShigo A (1967) Successions of organisms in discoloration and decay of wood. Pages 237 - 299. in JA Romberger, P Mikola, eds. International review of forestry research. Vol 2. Academic Press, New York, NY.nShigo AL (1986). A new tree biology: Facts, photos, and philosophies on trees and their problems and proper care. Shigo and Trees Associates, Durham, NH. 132 pp.nShigo AL, Hillis WE (1973) Heartwood, discolored wood, and microorganisms in living trees. Ann Rev Phytopathol 11:197 - 222.nShigo AL, Larson EvH (1969) A photo guide to the patterns of discoloration and decay in living northern hardwood trees. USDA For Serv, Northeastern Forest Experiment Station, Upper Darby, PA. 100 pp.nSiegle H (1967) Microbiological and biochemical aspects of heartwood stain in Betula papyriferaMarsh. Can J Bot 45(2):147 - 154.nToole ER (1961) Rot entrance through dead branches of southern hardwoods. For Sci 7:219-226.n
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