MvoloKoubaaBeaulieuEtAl2015

Référence

Mvolo, C.S., Koubaa, A., Beaulieu, J., Cloutier, A., Mazerolle, M.J. (2015) Variation in wood quality in white spruce (Picea glauca (Moench) Voss). Part I. defining the juvenile-mature wood transition based on tracheid length. Forests, 6(1):183-202. (Scopus )

Résumé

Estimations of transition age (TA) and juvenile wood proportion (JWP) are important for wood industries due to their impact on end-product quality. However, the relationships between analytical determination of TA based on tracheid length (TL) and recognized thresholds for adequate end products have not yet been established. In this study, we used three different statistical models to estimate TA in white spruce (Picea glauca (Moench) Voss) based on TL radial variation. We compared the results with technological maturity. A two-millimeter threshold, previously suggested for good paper tear strength, was used. Tracheid length increased from pith to bark and from breast height to upper height. Juvenile wood (JW) was conical with the three models. At breast height, TA ranged from 11 to 27 years and JWP ranged from 15.3% to 47.5% across the three models. The linear mixed model produced more conservative estimates than the maximum-quadratic-linear (M_Q_L) model. Both the linear mixed model and the M_Q_L model produced more conservative TA estimates than the piecewise model. TA estimates by the MIXED model, and to a lesser extent by the M_Q_L model, were equivalent to those for real mature wood, whereas TA estimates by the piecewise model were considerably lower, falling into the transition wood area. © 2015 by the authors; licensee MDPI, Basel, Switzerland.

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@ARTICLE { MvoloKoubaaBeaulieuEtAl2015,
    AUTHOR = { Mvolo, C.S. and Koubaa, A. and Beaulieu, J. and Cloutier, A. and Mazerolle, M.J. },
    TITLE = { Variation in wood quality in white spruce (Picea glauca (Moench) Voss). Part I. defining the juvenile-mature wood transition based on tracheid length },
    JOURNAL = { Forests },
    YEAR = { 2015 },
    VOLUME = { 6 },
    PAGES = { 183-202 },
    NUMBER = { 1 },
    NOTE = { cited By 0 },
    ABSTRACT = { Estimations of transition age (TA) and juvenile wood proportion (JWP) are important for wood industries due to their impact on end-product quality. However, the relationships between analytical determination of TA based on tracheid length (TL) and recognized thresholds for adequate end products have not yet been established. In this study, we used three different statistical models to estimate TA in white spruce (Picea glauca (Moench) Voss) based on TL radial variation. We compared the results with technological maturity. A two-millimeter threshold, previously suggested for good paper tear strength, was used. Tracheid length increased from pith to bark and from breast height to upper height. Juvenile wood (JW) was conical with the three models. At breast height, TA ranged from 11 to 27 years and JWP ranged from 15.3% to 47.5% across the three models. The linear mixed model produced more conservative estimates than the maximum-quadratic-linear (M_Q_L) model. Both the linear mixed model and the M_Q_L model produced more conservative TA estimates than the piecewise model. TA estimates by the MIXED model, and to a lesser extent by the M_Q_L model, were equivalent to those for real mature wood, whereas TA estimates by the piecewise model were considerably lower, falling into the transition wood area. © 2015 by the authors; licensee MDPI, Basel, Switzerland. },
    AUTHOR_KEYWORDS = { Juvenile wood proportion; Juvenile wood shape; Linear regression; Nonlinear regression; Tracheid length; Transition age },
    DOCUMENT_TYPE = { Article },
    DOI = { 10.3390/f6010183 },
    KEYWORDS = { Forestry; Linear regression, Analytical determination; Juvenile woods; Linear mixed models; Non-linear regression; Piece-wise models; Radial variations; Tracheid length; Transition age, Wood, height; juvenile; numerical model; regression analysis; strength; wood quality, Juvenile Wood; Regression Analysis; Statistical Analysis; Tracheids, Picea glauca },
    SOURCE = { Scopus },
    URL = { http://www.scopus.com/inward/record.url?eid=2-s2.0-84922446722&partnerID=40&md5=ee53249cded72cf106eb1bf3f5ee03ca },
}

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