Thermal stability of Abies alba wood according to its radial position and forest management
- 33 Downloads
Most of the defects affecting heat-treated wood quality are often attributed to heterogeneous heat transfers in industrial kilns. Even if interspecific variability of wood has been reported to affect thermal degradation of the material, little has been reported on the effects of intraspecific variability. The aim of this work was to study the effect of intraspecific variability of silver fir (Abies alba Mill.) wood on its thermal degradation. For this purpose, wood samples were sampled along the radius of cross-sections to estimate the effect of radial position on wood thermal degradation. Sampling was carried out on discs of four trees, two resulting from dynamic growth stand and two from standard growth stand. The study was performed at different scales: at wood compartments scale involving juvenile and mature heartwood, transition zone between heartwood and sapwood and sapwood as well as at intra-ring scale. Wood samples were ground to sawdust and subjected to thermogravimetric analysis and chemical analysis. Juvenile heartwood was shown to be more sensitive to thermal degradation than other compartments. The thermal behavior of sapwood was not particularly different from that of heartwood, and the presence of extractives did not influence significantly thermal degradation. Earlywood was more sensitive to thermal degradation than latewood explaining the higher susceptibility of fast growing heartwood containing larger rings with higher contents of earlywood.
The authors gratefully acknowledge the Région Lorraine and Lab of Excellence ARBRE for PhD grant of the first author. LERMAB and SILVA are supported by a grant overseen by the French National Research Agency (ANR) as part of the “Investissements d’Avenir” program (ANR-11-LABX-0002-01, Lab of Excellence ARBRE) and General Council of Lorraine. Authors warmly thank Pierre Gelhaye for management of sampling and the ONF RDI department “Pôle de Dole” (Dole) leaded by Bruno Chopard who puts at disposal the experimental design and helped in felling and logging the trees.
- Benson HP (1930) The application of silviculture in controlling specific gravity of wood. United States Department of Agriculture Washington, D.C, January 1930. Technical bulletin No. 168Google Scholar
- Bruchwald A, Dmyterko E, Niemczyk M, Łukaszewicz J (2015) Height and diameter growth rates of silver fir (Abies alba Mill.) growing in Beskid Niski mountains. SYLWAN 159:10:804–812Google Scholar
- Ellis S (1998) Mechanical properties of second-growth western hemlock. Basic wood properties of second-growth western hemlock. Forintek Canada Corporation. Vancouver. 44–49Google Scholar
- Esteves BM, Pereira HM (2009) Heat treatment of wood. BioResources 4:370–404Google Scholar
- Kimberley MO, Cown DJ, McKinley RB, Moore JR, Leslie J (2015) Modelling variation in wood density within and among trees in stands of New Zealand-grown radiata pine New Zealand. J Forest Sci 45:22Google Scholar
- Kretschmann DE (1998) Properties and use of wood, composites, and fiber products. For Prod Lab. VI, 7. Issued 09/98Google Scholar
- Mothe F, Duchanois G, Zannier B, Leban J-M (1998a) Analyse microdensitométrique appliquée au bois: méthode de traitement des données utilisée à l’Inra-ERQB (programme Cerd).(Microdensitometric analysis of wood samples: data computation method used at Inra-ERQB (CERD program)). Ann For Sci 55:301–313CrossRefGoogle Scholar
- Mothe F, Sciama D, Leban J-M, Nepveu G (1998b) Localisation de la transition bois initial - bois final dans un cerne de chêne par analyse microdensitométrique. (Localization of the earlywood-latewood transition in oak rings using micro-densitometric analysis). Ann For Sci 55:437–449CrossRefGoogle Scholar
- Repellin V, Guyonnet R (2003) Evaluation of heat treated beech by non destructive testing: Author manuscript, published in First European Conference on Wood Modification 2003 3 to 4 April, Ghent, BelgiumGoogle Scholar
- Rowell RM, Pettersens R, Han JS, Rowell JS, Tshabalala MA (2005) Cell wall chemistry. In: Handbook of wood chemistry and wood composites. Taylor& Francis, Boca Raton, pp 35–72Google Scholar
- Stringer JW, Olson JR (1987) Radial and vertical variation in stem properties of juvenile black locust (Robinia pseudoacacia). Wood Fiber Sci 19:1:59–67Google Scholar