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Official Journal of the Japan Wood Research Society

Table 3 Physical and mechanical properties of the clones (GT1 and RRIM 600)

From: Potential of rubberwood (Hevea brasiliensis) for structural use after the period of latex extraction: a case study in Brazil

Properties

D (1)12 (g cm−3)

D b (2) (g cm−3)

E (3)c (MPa)

σ (4)c║ (MPa)

σ (5) t (MPa)

σ (6)e║ (MPa)

σ (7)s (MPa)

σ (8)c (MPa)

σ (9)c,p (MPa)

σ (10) t (MPa)

σ (11)e (MPa)

Clone GT 1

 Arithmetic mean

0.662

0.541

12.61

49.83

76.45

48.15

9.43

11.24

5.94

4.23

NA

 CV (%)

7.5

4.4

11.5

7.5

21.3

8.9

18.7

8.5

15.2

25.9

NA

 Median*

0.663a

0.535a

12.75a

48.64a

78.43a

48.03a

8.89a

11.49a

6.14a

3.97a

NA

Clone RRIM 600

 Arithmetic mean

0.678

0.553

9.92

43.53

70.92

44.39

9.60

11.38

6.16

4.04

21.44

 CV (%)

4.5

6.3

10.4

8.6

25.6

16.7

17.4

16.9

14.8

15.3

9.5

 Median*

0.681a

0.550a

9.47b

42.44b

74.83a

47.70a

9.29a

11.72a

6.05a

4.11a

22.03

  1. CV coefficient of variation (%), NA data not available
  2. * Medians followed by the same letter in the same column are not statistically different (Mann–Whitney test, p > 0.05). D 12 density at 12 % of moisture content, D b basic density, E c modulus of elasticity in compression parallel, σ c  compression strength parallel, σ t tension strength parallel, σ e embedding strength parallel, σ s shear strength parallel, σ c compression strength perpendicular, σ c,pl compression stress perpendicular at proportional limit, σ t tension strength perpendicular, σ e embedding strength perpendicular