The evaluation of modulus of elasticity at an early stage of growth in sugi (Cryptomeria japonica) wood using S2 microfibril angle of latewood tracheids as a wood quality indicator
2009
Ishidoh, M.(Utsunomiya Univ. (Japan). Coll. of Agriculture) | Ishiguri, F. | Iizuka, K. | Yokota, S. | Ohno, H. | Yoshizawa, N.
The objective of this study was to examine the evaluation of modulus of elasticity (MOE) in mature wood using microfibril angle at an early stage of growth. Several wood qualities, such as latewood tracheid length, microfibril angle of Ssub(2) layer in latewood tracheid (MFA), and static bending property were examined in 45-year-old sugi (Cryptomeria japonica) trees originated from seedlings. From the results of the radial variation of the MFA and latewood tracheid length, the boundary between juvenile wood and mature wood was determined to be around 21st to 24th annual rings from the pith. MFA showed a significant negative correlation with MOE and specific MOE, r=-0.747 and r=-0.889, respectively. In addition, the MFA value at the 3rd annual ring showed a significant negative correlation with MOE and specific MOE, r=-0.556 and r=-0.623, respectively. These results indicate that MOE value in mature wood can be evaluated using MFA values at an early stage of growth in sugi wood originated from seedlings.
显示更多 [+] 显示较少 [-]