Evaluation of the wood quality of young Cryptomeria japonica clones
2009
Miyashita, H.(Forest Tree Breeding Center, Takizawa, Iwate (Japan). Tohoku Regional Breeding Office) | Orita, H. | Handa, T.
One hundred and fourteen 10-year-old standing C. japonica 38 clones were examined by a non-destructive method to ascertain the possibility of evaluating the wood quality of standing trees with breast-height diameters of less than 10 cm. The results suggested that basic density could be estimated based on its significant negative correlation to pilodyn penetration depth (r=-0.81, p0.01). In terms of the modulus of elasticity, there was a significant positive correlation between the stress wave propagation velocity and the dynamic modulus of elasticity of logs (r=16 cm, density and strength can be estimated for 10-year-old C. japonica clones with an average breast height diameter of =10 cm. Because the measurement method investigated in the present study is non-destructive and can test efficiently a large number of trees, it is suitable for evaluating the wood quality of 10-year-old breeding materials in progeny test plantation.
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