Chemical Components of Teak Wood with Eccentric Growth
The objective of this study is to learn the quality of abnormal woods. The specimens were 10 leaning trees obtained from thinned teak (Tectona grandis L.f.) stand in Randublatung, Central Java. In each tree, the eccentric growth parts were isolated, then wood meal sample was drilled at the outer hea...
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| Main Author: | |
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| Format: | Article |
| Language: | English |
| Published: |
Universitas Gadjah Mada
2011-01-01
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| Series: | Jurnal Ilmu Kehutanan |
| Subjects: | |
| Online Access: | https://jurnal.ugm.ac.id/jikfkt/article/view/579 |
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| Summary: | The objective of this study is to learn the quality of abnormal woods. The specimens were 10 leaning trees obtained from thinned teak (Tectona grandis L.f.) stand in Randublatung, Central Java. In each tree, the eccentric growth parts were isolated, then wood meal sample was drilled at the outer heartwood part of both maximum annual-ring width (upper part of leaning stem) and in its opposite side, which had minimum annual-ring width (lower part of leaning stem). The wood meals were ground to size of 40-60 mesh for chemical analysis. Data analysis by paired t-test showed that no significant difference was found between the upper and lower parts in ethanol-benzene extractive content (4-12%), hot-water soluble content (1-3%), ash content (0.73%) and acid soluble lignin content (0.7-1.4 %) . By means of Gas Chromatography (GC) and Gas Chromatography-Mass Spectrometry (GC-MS), no striking difference was also observed in the levels of major components of ethanol-benzene extracts. On the other hand, in Klason lignin content, the wood with widest ring consistently showed a higher content (32-35 %) than that with narrowest ring (29-33 %). These findings indicated that the eccentricity is more related to cell wall components than to secondary metabolites. Further, there is no indication with regard to the formation of tension wood. |
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| ISSN: | 0126-4451 2477-3751 |