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Official Journal of the Japan Wood Research Society

Table 5 Variations of wood density (WD), modulus of rupture (MOR), modulus of elasticity (MOE), and dynamic modulus of elasticity (Ed) within stem and between sites of Melia azedarach

From: Within-stem variations in mechanical properties of Melia azedarach planted in northern Vietnam

Variable

Description

n

WD (g/cm3)

MOR (MPa)

MOE (GPa)

Ed (GPa)

Radial direction (%)

10

60

0.44 ± 0.01c

54.64 ± 2.55c

7.81 ± 0.22c

9.15 ± 0.24c

50

60

0.52 ± 0.01b

82.18 ± 2.23b

9.55 ± 0.20b

11.20 ± 0.22b

90

60

0.57 ± 0.01a

98.94 ± 1.48a

10.41 ± 0.21a

12.45 ± 0.23a

Stem height (m) above the ground

7.3

36

0.51 ± 0.01a

77.58 ± 4.20a

9.71 ± 0.32a

11.25 ± 0.38a

5.3

36

0.49 ± 0.01a

74.70 ± 4.01a

8.87 ± 0.35a

10.76 ± 0.40a

3.3

36

0.51 ± 0.01a

78.78 ± 4.31a

9.52 ± 0.31a

11.25 ± 0.36a

1.3

36

0.50 ± 0.01a

81.28 ± 4.05a

9.36 ± 0.29a

10.86 ± 0.34a

0.3

36

0.52 ± 0.01a

80.57 ± 4.07a

8.84 ± 0.34a

10.55 ± 0.38a

Site

1

90

0.50 ± 0.01b

66.20 ± 2.55b

8.25 ± 0.19b

9.73 ± 0.21b

2

90

0.52 ± 0.01a

90.97 ± 1.90a

10.27 ± 0.16a

12.13 ± 0.18a

Mean

 

180

0.51 ± 0.01

78.58 ± 1.84

9.26 ± 0.15

10.93 ± 0.17

  1. Mean values are followed by standard errors
  2. n number of wood specimen
  3. a,b,cMeans with different superscript within a column significantly differ (p < 0.05)