Preliminary evaluation of the feasibility for the establishment of short-rotation Cryptomeria japonica forestry for producing dimensional lumber using male-sterile full-sib families developed in Tokyo
Preliminary evaluation shows promising lumber qualities in short-rotation Cryptomeria japonica male-sterile families, indicating potential for forestry practices.
Key Points
This study aims to evaluate the wood properties and lumber qualities of male-sterile Cryptomeria japonica full-sib families for short-rotation forestry.
Examined 14-year-old male-sterile Cryptomeria japonica trees from five full-sib families.
Measured standing tree characteristics, wood properties, and lumber quality based on Japanese Agricultural Standards.
Conducted tests for stress-wave velocity, modulus of elasticity (MOE), and modulus of rupture (MOR) in both trees and lumber samples.
90% of lumber pieces exceeded the structural visual grading class value of MOR (28.4 MPa).
Mean values included 5.60 GPa for MOE and 58.7 MPa for MOR in trees.
Preliminary lower tolerance limit of MOR for lumber was estimated at 23.1 MPa with 75% confidence.