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Official Journal of the Japan Wood Research Society

Table 5 Variation in basic density (BD), tangential shrinkage (αT), radial shrinkage (αR), and tangential/radial shrinkage ratio (αT/αR) within stem and between sites of Melia azedarach

From: Transverse shrinkage variations within tree stems of Melia azedarach planted in northern Vietnam

Variable

Description

n

BD (g/cm3)

α T (%)

α R (%)

α T/αR

Radial position from pith (%)

10

60

0.39 ± 0.001c

6.34 ± 0.07c

3.69 ± 0.09c

1.76 ± 0.03a

50

60

0.44 ± 0.001b

7.22 ± 0.09b

4.56 ± 0.06b

1.59 ± 0.02b

90

60

0.47 ± 0.001a

7.61 ± 0.08a

4.90 ± 0.07a

1.56 ± 0.02b

Height above the ground (m)

0.3

36

0.45 ± 0.01a

7.30 ± 0.12a

4.52 ± 0.13a

1.65 ± 0.04a

1.3

36

0.43 ± 0.01a

7.14 ± 0.12a

4.32 ± 0.14a

1.69 ± 0.04a

3.3

36

0.43 ± 0.01a

7.03 ± 0.15a

4.28 ± 0.13a

1.67 ± 0.03a

5.3

36

0.42 ± 0.01a

6.87 ± 0.14a

4.38 ± 0.13a

1.59 ± 0.03a

7.3

36

0.44 ± 0.01a

6.93 ± 0.14a

4.41 ± 0.11a

1.58 ± 0.03a

Site

1

90

0.42 ± 0.01b

6.73 ± 0.08b

4.10 ± 0.08b

1.68 ± 0.02a

2

90

0.44 ± 0.01a

7.37 ± 0.08a

4.67 ± 0.07a

1.60 ± 0.02b

Mean

 

180

0.43 ± 0.01

7.05 ± 0.06

4.38 ± 0.06

1.64 ± 0.02

  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)