Abstract
This paper describes the study of a 31-year-old Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) stand located in Southern Italy, which was thinned 19 years after planting. The aim of the study is to evaluate the influence of three thinning treatments (unthinned, selective, and geometrical) performed twelve years later on wood density (WD), moisture content, shrinkage, ring width (RW), latewood proportion (LW%), modulus of elasticity, compression (CS), and bending strength (BS). The WD was higher in the unthinned stand. LW% and BS were lowest in the selective thinning and in the geometrical thinning, respectively. No significant differences were found in other variables. In addition, the thinning processes mostly affected the medium tree class more than the dominant and suppressed ones. Regression analysis established a correlation between mechanical characteristics and WD, RW and LW%. Mechanical strength is strongly correlated with WD than other variables. The stepwise model showed that WD and RW are most closely related to the behavior of CS, whereas only WD explained variation in BS. Stand density reduction may improve the development of stands without greatly affecting wood quality.
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References
Barbour RJ, Johnston S, Hayes JP, Tucker GF (1997) Simulated stand characteristics and wood product yields from Douglas-fir plantations managed for ecosystem objectives. For Ecol Manag 91(2–3):205–219
Brancheriau L, Bailleres H (2002) Natural vibration analysis of clear wooden beams: a theoretical review. Wood Sci Technol 36:347–365
Cave JD, Walker JCF (1994) Stiffness of wood in fast-grown plantation softwoods: the influence of microfibril angle. For Prod J 44(5):43–48
Ciancio O, Nocentini S (1978) Prove di diradamento su Pseudotsuga menziesii con il metodo del fattore distanziale di Hart-Becking. Annali dell’Istituto Sperimentale per la Selvicoltura di Arezzo 9:3–33
Corona P, Ferrara A, La Marca O (1989) Un sistema di misura delle ampiezze anulari: il dendrogronografo “Smile 3”. Ital For Mont 49(5):391–404
DiLucca CM (1989) Juvenile-mature wood transition. In: Kellogg RM (ed) Second growth Douglas fir: its management and conversion for value. Forintek Canada Corp, Vancouver, BC Sp. Publ. No. SP-32. pp 23–38
Duncan DB (1955) Multi range and multi F test. Biometrics 11:1–42
Dutilleul P, Herman M, Avella-Shaw T (1998) Growth rate effects on correlation among ring width, wood density and mean tracheid length in Norway spruce (Picea abies). Can J For Res 28:56–68
Erickson HD, Harrison AT (1974) Douglas-fir wood quality studies. Part I: effects of age and stimulated growth on wood density and anatomy. Wood Sci Technol 8:207–226
Gartner BL, North EM, Johnson GR, Singleton R (2002) Effects of live crown on vertical patterns of wood density and growth in Douglas-fir. Can J For Res 32:439–447
Green DW, Winandy JE, Kretschmann DE (1999) Mechanical properties of wood. In: Wood handbook. Wood as an engineering material. General technical report FPL-GTR-113. U.S. Department of Agriculture, Forest Service, Forest Products Laboratory, Madison, p 463
Hecker M, Becker G (1996) The influence of silvicultural management on surface roughness of Douglas-fir veneers. Eur J For Res 1–6:45–52
Hein S, Weiskittel AR, Kohnle U (2008) Effect of wide spacing on tree growth, branch and sapwood properties of young Douglas-fir (Pseudotsuga menzieii (Mirb.) Franco) in south-western Germany. Eur J For Res 127:481–493
Hocking RR (1976) The analysis and selection of variables in linear regression. Biometrics 32:1–49
Jozsa LA, Kellogg RM (1986) An exploratory study of the density and annual ring width trends in fast-growth coniferous wood in British Columbia. CFS Contract Rept. No. 02-80-55-017. Forintek Canada Corp, Vancouver, BC, p 43
Jozsa LA, Middleton GR (1994) A discussion of wood quality attributes and their practical implications. Forintek Canada Corp, Vancouver, BC Special Publ. No. SP-34
Kennedy RW (1995) Coniferous wood quality in the future: concerns and strategies. Wood Sci Technol 29:321–338
La Marca O (1986) Risultati dei primi 5 anni di osservazioni su popolamenti di douglasia (Pseudotsuga menziesii (Mirb.) Franco) sottoposti a prove di diradamento. Ital For Mont 41:333–349
Leban JM, Haines DW (1999) The modulus of elasticity of hybrid larch predicted by density, rings per centimeter and age. Wood Fiber Sci 31(4):394–402
Macdonald H, Hubert J (2002) A review of the effect of silviculture on timber quality of Sitka spruce. Forestry 2:107–138
Marshall DD, DeBell DS (2002) Stem characteristics and wood properties: essential considerations in sustainable multipurpose forestry regimes. In: Johnson AC, Haynes RW, Monserud RA (ed) Proceedings from the wood compatibility initiative workshop. Gen. Tech. Rep. PNW-GTR-563. U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station, Portland, vol 15. pp 145–149
Menguzzato G, Tabacchi G (1986) Prove di diradamento su Pseudotsuga menziesii in Calabria. Ambiente, tavole di cubatura e della biomassa epigea. Annali dell’Istituto Sperimentale per la Selvicoltura di Arezzo 17:257–293 (In Italian with English summary)
Moretti N, Quartulli S (1992) Physical and mechanical properties of the wood of young forest of douglasia (Pseudotsuga menziesii (Mirb.) Franco) growing in Puglia and Basilicata areas. Monti e Boschi 6:42–46 (In Italian with English summary)
Nepveu G, Blanchon JL (1989) Largeur de cerne et aptitude à l’usage en structure de quelques conifères: douglas, pin sylvestre, pin maritime, épicéa de sitka, épicéa commun, sapin pectiné. Rev For Fr 41(6):497–506
Peltola H, Kilpeläinen A, Sauvala K, Räisänen T, Ikonen VP (2007) Effects of early thinning regime and tree status on the radial growth and wood density of Scots pine. Silva Fenn 41:489–505
Polge H (1984) Influence des espacements de plantation sur la qualité du bois de douglas. Forêt Entrep 17:16–20
Riou-Nivert PH (1989) Douglas, qualités de bois, élegage et sylviculture. Rev For Fr 41(5):387–510
Riyanto DS, Gupta R (1996) Effect of ring angle on shear strength parallel to the grain of wood. For Prod J 46(7–8):87–92
Rozenberg P, Franc A, Bastien C, Cahalan C (2001) Improving models of wood density by including genetic effects: a case study in Douglas-fir. Ann For Sci 58:385–394
Schweingruber HS (1988) Tree rings: basic and applications of dendrochronology. Kluwer, Dordrecht
Susmel L (1952) Corrélation entre l’ampleur des anneaux et des zones tardives, la longueur des trachéides et les poids spécifiques dans le bois de sapin de douglas. Ital For Mont 7:1–16 (In Italian with French summary)
Terranova O, Antronico L, Coscarelli R, Iaquinta P (2009) Soil erosion risk scenarios in the Mediterranean environment using RUSLE and GIS: an application model for Calabria (southern Italy). Geomorphology 112 (3–4), 15:228–245
Todaro L, Quartulli S, Robusto A, Moretti N (2002) Effects of different thinning regimes on stand stability and timber assortments in a Douglas-fir forest. Ital For Mont 5:451–466 (In Italian with English summary)
UNI-ISO 3130 (1985) Wood. Determination of moisture content for physical and mechanical tests
UNI-ISO 3131 (1985) Wood. Determination of density for physical and mechanical tests
UNI-ISO 3133 (1985) Wood. Determination of ultimate strength in static bending
UNI-ISO 3787 (1985) Wood. Test methods. Determination of ultimate stress in compression parallel to grain
UNI-ISO 4469 (1985) Wood. Determination of radial and tangential shrinkage
UNI-ISO 4858 (1988) Wood. Determination of volumetric shrinkage
Vanninen P, Ylitalo H, Sievanen R, Makela A (1996) Effect of age and site quality on the distribution of biomass in Scots pine (Pinus sylvestris L.). Trees 10(4):231–238
Vargashernandez J, Adams WT (1994) Genetic relationships between wood density components and cambial growth rhythm in young coastal Douglas-fir. Can J For Res 24(9):1871–1876
Wang SY, Wang HL (1999) Effects of moisture content and specific gravity on static bending properties and hardness of six wood species. J Wood Sci 45:127–133
Wang SY, Lin CJ, Chiu CM, Chen JH, Yang TH (2005) Dynamic modulus of elasticity and bending properties of young Taiwania trees grown with different thinning and pruning treatments. J Wood Sci 51:1–6
Weiskittel AR, Maguire DA, Robert A, Monserud RA (2007) Response of branch growth and mortality to silvicultural treatments in coastal Douglas-fir plantations: implications for predicting tree growth. For Ecol Manag 251:182–194
Winistorfer SG (1995) Practical considerations of dowel bearing ring fastener orientation. For Prod J 45:64–68
Zang SY (1994) Mechanical properties in relation to specific gravity in 342 Chinese woods. Wood Fiber Sci 28(4):512–526
Zobel BJ, van Buijtenen JP (1989) Wood variation: its causes and control. Springer, Berlin
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Communicated by T. Seifert .
Italian Douglas-fir thinning and properties.
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Todaro, L., Macchioni, N. Wood properties of young Douglas-fir in Southern Italy: results over a 12-year post-thinning period. Eur J Forest Res 130, 251–261 (2011). https://doi.org/10.1007/s10342-010-0425-9
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DOI: https://doi.org/10.1007/s10342-010-0425-9