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Journal of Wood Science

Official Journal of the Japan Wood Research Society

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Application of the fractometer for crushing strength: juvenile-mature wood demarcation in Taiwania (Taiwania cryptomerioids)

Journal of Wood Science volume 52, pages 9–14 (2006)Cite this article

Abstract

The fractometer is a device that breaks a radial increment core along the fiber for the measurement of crushing strength, which is a direct wood quality indicator for structural lumber. In this study, the crushing strength of Taiwania (Taiwania cryptomerioides Hay) trees using the fractometer was investigated and the data were used to determine the position of demarcation between juvenile and mature wood. Segmented regression and variance component analysis were used to estimate the demarcation position. With increasing cambium age, the core wood improves the crushing strength in the outer wood area. Within-tree variations in wood properties were greater than between-tree variations. In this experiment, the position of demarcation between juvenile and mature wood occurred at an approximate distance of 10.8cm to 13.2cm from the pith at about 18–20 years of cambium age.

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Authors and Affiliations

  1. Division of Forest Management, Taiwan Forestry Research Institute, Taipei, 100, Taiwan

    Chih-Ming Chiu

  2. Department of Forestry, College of Agriculture, National Taiwan University, Taipei, 106, Taiwan

    Song-Yung Wang, Te-Hsin Yang & Ming-Chun Jane

  3. Division of Forest Utilization, Taiwan Forestry Research Institute, 53 Nanhai Rd., Taipei, 100, Taiwan

    Cheng-Jung Lin

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  1. Chih-Ming Chiu
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  2. Song-Yung Wang
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  3. Cheng-Jung Lin
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Correspondence to Cheng-Jung Lin.

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Chiu, CM., Wang, SY., Lin, CJ. et al. Application of the fractometer for crushing strength: juvenile-mature wood demarcation in Taiwania (Taiwania cryptomerioids). J Wood Sci 52, 9–14 (2006). https://doi.org/10.1007/s10086-005-0723-x

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  • DOI: https://doi.org/10.1007/s10086-005-0723-x

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