Wood density and microfibril angle from pith to bark of a sugi cultivar (Cryptomeria japonica, Japanese cedar, Tosaaka) grown in a Nelder plot

The current stumpage price in harvesting of a 50-year-old sugi (Japanese cedar, Cryptomeria japonica ) plantation is not enough to motivate forest owners to reforest. Therefore, it is vital to reduce the cost for reforestation after logging as well as for logging and wood transportation of the prece...

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Bibliographic Details
Published in:Journal of wood science 2022-12, Vol.68 (1), p.57-11, Article 57
Main Authors: Kijidani, Yoshio, Tsuyama, Taku, Oda, Hisato, Hirata, Ryoko, Ito, Satoshi
Format: Article
Language:English
Subjects:
Bark
Biomedical and Life Sciences
Cedar
Characterization and Evaluation of Materials
Cultivars
Density
Dimensional stability
Environmental factors
Japanese cedar
Knots
Life Sciences
Logging
Low initial tree density
Materials Science
Mechanical properties
Microfibril angle
Nelder plot
Original Article
Plantations
Reforestation
Trees
Wood
Wood density
Wood Science & Technology
Zoning
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Summary:The current stumpage price in harvesting of a 50-year-old sugi (Japanese cedar, Cryptomeria japonica ) plantation is not enough to motivate forest owners to reforest. Therefore, it is vital to reduce the cost for reforestation after logging as well as for logging and wood transportation of the preceding stands. Low initial tree density has been emphasized as one of the important basic measures to reduce directly the reforestation costs. In this study, for better understanding of the mechanical properties and dimensional stability of lumbers from sugi trees grown in low initial tree density, we examined the effects of initial tree density on wood density and microfibril angle of the S 2 layer in the secondary wall of tracheids in rings from pith to bark in a sugi cultivar (Tosaaka) grown in a Nelder plot (initial density zoning symbols; D (4823 trees/ha), E (3349 trees/ha), G (1615 trees/ha), H (1122 trees/ha) and J (541 trees/ha)). Ring width and latewood percentage in J tree (541 trees/ha) were significantly larger and smaller than those of other initial tree density zoning symbol trees, respectively. Average wood density and earlywood wood density in J tree (541 trees/ha) were significantly smaller than those of other initial tree density zoning symbol trees (Tukey’s honestly significant difference test (Tukey HSD), p  
ISSN:1435-0211
1611-4663
DOI:10.1186/s10086-022-02063-0