Basic wood properties of Borneo ironwood (Eusideroxylon zwageri) planted in Sarawak, Malaysia

Aiso-Sanada, Haruna and Nezu, Ikumi and Ishiguri, Futoshi and Aina Nadia Najwa, Binti Mohamad Jaffar and Douglas Bungan, Anak Ambun and Mugunthan, A/L Perumal and Mohd Effendi, Bin Wasli and Ohkubo, Tatsuhiro and Abe, Hisashi (2020) Basic wood properties of Borneo ironwood (Eusideroxylon zwageri) planted in Sarawak, Malaysia. TROPICS, 28 (4). pp. 99-103. ISSN 0917-415X

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Abstract

The aim of this study is to obtain the basic wood properties of planted Borneo ironwood (Eusideroxylon zwageri) from a plantation established about 80 years ago. Stem diameter at 1.3 m above the ground, tree height, and stress-wave velocity (SWV) of stem were measured on 36 planted E. zwageri trees. Later, core samples were collected from four trees whose measurements represented the average stem diameter of all the measured trees. Using the core samples, the moisture content (MC), basic density (BD), and compressive strength parallel to grain (CS) were measured. Dynamic Youngʼs modulus for longitudinal direction at green condition (E) was also calculated from SWV. There was no significant relationship between growth characteristics and SWV. Mean values of MC, BD, CS, and E were 37.2 %, 0.86 g/cm3 , 64.3 MPa, and 18.47 GPa, respectively. Significant differences among individual trees were found in MC, BD, and CS. In addition, radial variations were almost constant from bark side to pith side. The results indicate that longitudinal E is independent from growth characteristics, and that the E. zwageri wood tested in this study has uniform BD and CS in the radial direction.

Item Type: Article
Uncontrolled Keywords: Borneo ironwood, compressive strength, basic density, dynamic Youngʼs modulus, unimas, university, universiti, Borneo, Malaysia, Sarawak, Kuching, Samarahan, ipta, education, research, Universiti Malaysia Sarawak.
Subjects: S Agriculture > SD Forestry
Divisions: Academic Faculties, Institutes and Centres > Faculty of Resource Science and Technology
Depositing User: Gani
Date Deposited: 21 May 2020 09:50
Last Modified: 21 May 2020 09:55
URI: http://ir.unimas.my/id/eprint/29769

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