Identification and characterisation of Douglas-fir (Pseudotsuga Menziesii (Mirb.) Franco) juvenile and adult wood grown in Southern Germany

• Autorzy: Blohm J. H. , Evans R. , Koch G. , Schmitt U.

Identyfikatory

DOI

10.12841/wood.1644-3985.C01.05

• Języki publikacji: EN

Abstrakty

EN

More than one-third of Germany’s Douglas-fir resources, stock in age-classes from twenty-one to fifty-nine years. As such timber increasingly enters markets, detailed knowledge of the anatomy and properties of its wood is of importance to forest managers and wood processors. Anatomical and mechanical wood analyses in this study were carried out on twenty trees from four scientifically managed plantations in Southern Germany. The age of the trees selected was forty-two years whereby varying growth conditions were considered. Juvenile and adult woods were identified by segmented linear regression of radial profiles of anatomical characteristics, such as latewood percentage, tracheid wall thickness microfibril angle and density. Additionally, the width of earlywood, latewood and growth rings as well as bending modulus of elasticity were determined. Variance was dependent on the trait used for differentiation, juvenile wood comprised of an eleven to thirty-one growth rings resp. radial amounts of fifteen to sixty-five percent. When compared to adult wood, juvenile wood showed corresponding features of approximately thirty percent wider growth rings, thirty four percent lower latewood percentage, fourteen percent thinner tracheid walls, and eighty percent larger microfibril angles, eleven percent lighter wood and fifty-seven percent lower bending modulus of elasticity. As the assortment features fast grown trees, adult heartwood characteristics were slightly inferior to the characteristics of European Douglas-fir.

Słowa kluczowe

EN

Douglas fir; plantation trees; juvenile wood identification; adult wood identification; histometry

• Wydawca: Sieć Badawcza Łukasiewicz - Poznański Instytut Technologiczny
• Czasopismo: Drewno : prace naukowe, doniesienia, komunikaty
• Rocznik: 2016
• Tom: vol. 59, nr 197
• Strony: 41--47
• Opis fizyczny: Bibliogr. 21 poz., rys., tab.

Twórcy

autor

Blohm J. H.

• Thünen Institute of Wood Research, Hamburg, Germany

autor

Evans R.

• Silviscan Pty Ltd., Victoria, Australia

autor

Koch G.

• Thünen Institute of Wood Research, Hamburg, Germany

autor

Schmitt U.

• Thünen Institute of Wood Research, Hamburg, Germany

Bibliografia

• Abdel-Gadir A.Y., Krahmer R.L. [1993a]: Estimating the age of demarcation of juvenile and mature wood in Douglas-fir. Wood and Fiber Science 25 [3]: 242-249
• Abdel-Gadir A.Y., Krahmer R.L. [1993b]: Genetic variation in the age of demarcation between juvenile and mature wood of Douglas fir. Wood and Fiber Science 25 [4]: 384-394
• Aniol R.W. [1983]: Tree ring analysis using Catras. Dendrochronologia 1: 45-53
• Aniol R.W. [1987]: A new device for computer assisted measurement of tree-ring widths. Dendrochronologia 5: 135-141
• Barnett J.R., Bonham V.A. [2004]: Cellulose microfibril angle in the cell wall of wood fibres. Biological Reviews 79: 461-472
• Bawcombe J. [2012]: A study of Douglas-fir anatomical and mechanical properties and their interactions, Dissertation. University of Bath, Bath
• Bendtsen B.A. [1978]: Properties of wood from improved and intensively managed trees. Forest Products Journal 28 [10]: 61-72
• Blohm J.H. [2015]: Quality and properties of juvenile and adult wood of Douglas fir (Pseudotsuga menziesii) from southern Germany. (in German). Dissertation. University of Hamburg
• Di Lucca C. [1989]: Juvenile-mature wood transition. Kellogg, R.M., Vancouver B.C.: Forintek Canada Corp.
• Fabris S. [2000]: Influence of cambial ageing, initial spacing, stem taper and growth rate on the wood quality of three coastal conifers. Dissertation. University of British Columbia, Vancouver B.C.
• Gartner B.L., North E.M., Johnson G.R., Singleton R. [2002]: Effects of live crown on vertical patterns of wood density and growth in Douglas-fir. Canadian Journal of Forest Research 32: 439-447
• Knigge W. [1958]: Studies on the relationships between wood properties and growth characteristics of the guest tree species Douglas fir (Pseudotsuga taxifolia Britt.). (in German). J. D. Sauerländer’s, Frankfurt am Main
• Kruskal W.H., Wallis W.A. [1952]: Use of ranks in one-criterion variance analysis. Journal of the American Statistical Association 47 [260]: 583-621
• Lachenbruch B., Johnson G.R., Downes G.M., Evans R. [2010]: Relationships of density, microfibril angle, and sound velocity with stiffness and strength in mature wood of Douglas-fir. Canadian Journal of Forest Research 40: 55-64
• Lichtenegger H., Reiterer A., Stanzl-Tschegg S., Fratzl P. [1999]: Variation of cellulose microfibril angles in softwoods and hardwoods – a possible strategy of mechanical optimization. Journal of Structural Biology 128: 257-269
• Lundqvist S.O., Evans R. [2004]: Illustration of wood and fiber measurements with SilviScan. In: STFI Report: STFI
• Miller D.A. [1966]: ‘Significant’ and ‘highly significant’. Nature 210: 1190
• Peterson M.G., Dietterich H.R., Lachenbruch B. [2007]: Do Douglas-fir branches and roots have juvenile wood? Wood and Fiber Science 39 [4]: 651-660
• Pollet C., Henin J.M., Jourez B., Hebert J. [2013]: Impact of growth rate on the mechanical properties of Douglas-fir grown in Wallonia (Southern Belgium). IUFRO, Nancy: Measurement methods and modelling approaches for predicting desirable future wood properties
• Rathgeber C.B.K., Decoux V., Leban J.M. [2006]: Linking intra-tree-ring wood density variations and tracheid anatomical characteristics in Douglas fir (Pseudotsuga menziesii (Mirb.) Franco). Annals of Forest Science 63: 699-706
• Thünen Institute [2014]: Third National Forest Inventory – Results. (in German). Thünen Institute (ed.)

Uwagi

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę.