Komposisi Ekstraktif KayuJati (Tectona grandis) yang Terserang Busuk Hati �Variasi dalam Pohon
| Main Authors: | , LAYLY INAYAH, , Dr. Ganis Lukmandaru, S. Hut., M. Agr. |
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| Format: | Thesis NonPeerReviewed |
| Terbitan: |
[Yogyakarta] : Universitas Gadjah Mada
, 2013
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| Subjects: | |
| Online Access: |
https://repository.ugm.ac.id/120125/ http://etd.ugm.ac.id/index.php?mod=penelitian_detail&sub=PenelitianDetail&act=view&typ=html&buku_id=60145 |
Daftar Isi:
- Teak (Tectonagrandis Linn.Fil) is one of timber most frequently used due to of the durability and good appearance of the wood. Despite of that, some teak trees were found with heart-rot whether they were from plantion forests or community forests. The data regarding teak wood with the heart-rot are still limited. As the natural resistance of wood is affected by extractive substances, thus this study aims to determine the composition of extractives contained in the teak wood affected by the heart-rot. The material used are the heart-rot affected and healthy tress a teak woods from community forest of Gunungkidul. Trees were (± 30 cm in diameter) felled and then cut into 3 parts axially according to that affected with heart-rot at the base (heartrot diameter ± 15 cm), middle (heart-rot diameter ± 5cm) and the top. At each radial section, it is divided into three parts: sapwood (SW), outer heartwood (OH) and inner heartwood (IH). From the base part of heart-rot the affected the inner heartwood, sample was taken as decayed inner heartwood (DIH). The samples were milled to 40- 60 mesh wood powder. Successive extraction is done by using solvents as follows petroleum ether, dichloromethane, acetone/water (9:1, v/v) ethanol/water (8:2, v/v) and water. Fractionation was also performed on petroleum ether, acetone/water (9:1) and ethanol/water (8:2) extracts, as well as etanol-toluene extraction The results of the heart-rot teak woods on its extractives composition is characterized by the increasing in thelevelof ethanol/toluene extractives in the sapwood,the polar fraction in the outer heartwood and inner heartwood, and the decreasing of dichloromethane extractiveswhen compared to healthy teak woods. The intensity of smaller heart-rot also show differences in the composition of extractives in the heartwood, which is the increasing the consentrat of total extractive content and aceton/water (9:1) extracts as well as the decreasing the dicholoromethane extract. The composition of decayed sample is dominated by extractives soluble in ethanol/water and water to the healthy samples. From the composition of the polar extracts, indicatedsheart-rot in the wood is caused by fungal attacks.