Figure 1
Wood sampling scheme for extractive analysis.
Table 1
Description of tree samples from young S. mahagoni trees.
| No | Age (year) | Average of DBH (cm) | Average of total merchantable height (m) |
|---|---|---|---|
| 1 | 1 | 1.08 ± 0.28 a | 0.54 ± 0.10 |
| 2 | 2 | 1.99 ± 0.32 | 1.72 ± 0.16 |
| 3 | 3 | 4.46 ± 0.10 | 4.25 ± 0.10 |
| 4 | 4 | 6.13 ± 1.12 | 4.80 ± 0.77 |
| 5 | 5 | 8.05 ± 1.17 | 6.60 ± 1.20 |
[i] Note: a = Diameter is taken at the level height 10%
Figure 2
Total extractive content of S. mahagoni based on oven-dry wood mean (a) and extractive weight (b).
Figure 3
Total phenolic content based on mg GAE/g dried extract from S. mahagoni (means of five trees) on the interaction of tree age and axial position with error bar as standard deviation. The same letters on the histograms implied no significant differences (p <0.05 by Duncan’s test).
Figure 4
Total soluble polysaccharide content based on mg GE/g dried extract from S. mahagoni (means of five trees) on the interaction of tree age and axial position with error bar as standard deviation. The same letters on the histograms implied no significant differences (p < 0.05 by Duncan’s test).
Table 2
Two-way ANOVA analysis for extractive, TPC, and TSP contents of S. mahagoni wood.
Table 3
The interaction of tree age with an axial position on the extractive content of S. mahagoni wood.
| Solvent | 1 year | 2 years | 3 years | |||
|---|---|---|---|---|---|---|
| Bottom | Top | Bottom | Top | Bottom | Top | |
| Sapwood | Sapwood | Sapwood | Sapwood | Sapwood | Sapwood | |
| n-Hexane | 0.71 ± 0.14 a | 1.09 ± 0.24 bc | 1.26 ± 0.08 bc | 1.28 ± 0.20 bcd | 1.41 ± 0.41 cd | 0.96 ± 0.13 ab |
| Methanol | 4.30 ± 0.85 bcde | 7.48 ± 2.34 f | 4.48 ± 0.48 abcde | 4.36 ± 1.04 cde | 3.72 ± 1.09 abcd | 2.57 ± 0.98 abc |
| Hot water | 2.09 ± 0.70 bc | 2.09 ± 0.50 bc | 3.57 ± 1.19 e | 2.22 ± 0.36 bc | 5.21 ± 0.65 f | 1.01 ± 0.20 a |
| Total | 7.10 ± 1.23 bc | 10.7 ± 2.27 de | 9.31 ± 1.25 cde | 7.86 ± 0.69 cd | 10.3 ± 1.59 de | 4.54 ± 0.95 ab |
| Solvent | 4 years | |||
|---|---|---|---|---|
| Bottom | Top | |||
| Sapwood | Heartwood | Sapwood | Heartwood | |
| n-Hexane | 1.64 ± 0.28 de | 1.90 ± 0.42 e | 1.14 ± 0.10 bc | 1.22 ± 0.06 bc |
| Metanol | 4.16 ± 1.34 bcde | 4.74 ± 1.32 cde | 1.66 ± 0.33 a | 1.93 ± 0.27 ab |
| Hot water | 3.19 ± 0.47 de | 3.40 ± 0.54 e | 1.13 ± 0.18 a | 1.50 ± 0.43 ab |
| Total | 8.98 ± 1.57 cde | 10.0 ± 1.16 de | 3.93 ± 0.52 a | 4.65 ± 0.56 ab |
| Solvent | 5 years | |||
|---|---|---|---|---|
| Bottom | Top | |||
| Sapwood | Heartwood | Sapwood | Heartwood | |
| n-Hexane | 1.31 ± 0.47 bcd | 2.39 ± 0.16 f | 1.29 ± 0.11 bcd | 1.42 ± 0.13 cd |
| Metanol | 6.42 ± 0.51 ef | 7.81 ± 1.33 f | 5.19 ± 2.38 cde | 7.55 ± 3.96 f |
| Hot water | 3.20 ± 0.35 de | 3.52 ± 0.62 e | 2.42 ± 0.86 bcd | 2.69 ± 1.26 cde |
| Total | 10.9 ± 0.41 e | 13.7 ± 1.80 f | 8.90 ± 2.29 cde | 11.7 ± 4.16 ef |
[i] Note: Average of five trees ± the standard deviation; The same letters in the same row are not significantly different at p < 5% by Duncan’s test.