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Journal of Wood Science

Official Journal of the Japan Wood Research Society

Table 2 Correlation coefficients between growth indexes and wood properties

From: Tree heights in the ring-formed years affect microfibril angles in the rings from juvenile to mature wood at breast height in hinoki trees (Chamaecyparis obtusa)

Wood properties

Growth indexes

Tree height

DBH

H/D

MFA3,5,6

−0.48 (0.036)*

−0.42 (0.072)

0.14 (0.56)

MFA9,10,12

−0.50 (0.029)*

−0.20 (0.41)

0.047 (0.85)

MFA15~

−0.47 (0.0009)**

−0.24 (0.11)

−0.17 (0.25)

Density3-8

−0.15 (0.49)

−0.20 (0.37)

0.23 (0.31)

Density9-14

−0.16 (0.49)

0.061 (0.79)

−0.23 (0.31)

Density15~

−0.31 (0.027)*

−0.52 (0.00008)**

0.49 (0.0002)**

TL3,5,6

0.47 (0.041)*

0.60 (0.0066)**

−0.51 (0.026)*

TL9,10,12

0.18 (0.46)

0.55 (0.014)*

−0.55 (0.015)*

TL15~

0.40 (0.0062)**

0.58 (0.00003)**

−0.53 (0.00019)**

E b4–7

0.15 (0.60)

0.29 (0.30)

0.17 (0.55)

E b8–14

−0.015 (0.94)

0.012 (0.95)

−0.068 (0.73)

E b15~

−0.18 (0.20)

−0.40 (0.0034)**

0.50 (0.00015)**

σ b4–7

0.37 (0.18)

0.093 (0.74)

0.40 (0.14)

σ b8–14

−0.21 (0.28)

−0.25 (0.19)

−0.027 (0.89)

σ b15~

−0.32 (0.02)*

−0.49 (0.00018)**

0.51 (0.0001)**

  1. The values represent the correlation coefficients between growth parameters and wood properties and the values in parentheses represent the p values. The small numbers of symbols of wood properties shows ring numbers in which the wood properties were measured. Tree height was obtained by stem analysis (Fig. 3)
  2. DBH diameter at breast height, H tree height, H/D tree height to diameter ratio, MFA microfibril angle, TL latewood tracheid length, E b modulus of elasticity in bending, σ b modulus of rupture in bending
  3. * p < 0.05, ** p < 0.01
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