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

IF 1 Q4 ECOLOGY Tropics Pub Date : 2020-02-01 DOI:10.3759/tropics.ms19-10
Haruna Aiso-Sanada, I. Nezu, F. Ishiguri, Aina Nadia Najwa Mohamad Jaffar, Douglas Bungan Anak Ambun, M. Perumal, Mohd Effendi bin Wasli, T. Ohkubo, H. Abe
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引用次数: 2

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 Young’s 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/cm, 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.
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马来西亚沙捞越种植的婆罗洲铁木(Eusideroxylon zwageri)的基本木材特性
本研究的目的是从大约80年前建立的种植园中获得种植的婆罗洲铁木(Eusideroxylon zwageri)的基本木材特性。对36株人工种植的茨瓦格里E.zwageri树进行了离地1.3米处的树干直径、树高和树干应力波速度(SWV)的测量。随后,从四棵树上采集了岩芯样本,这些树木的测量值代表了所有测量树木的平均树干直径。使用芯样,测量了水分含量(MC)、基本密度(BD)和平行于晶粒的抗压强度(CS)。在生坯条件(E)下纵向的动态杨氏模量也由SWV计算。生长特性与SWV之间没有显著关系。MC、BD、CS和E的平均值分别为37.2%、0.86 g/cm、64.3 MPa和18.47 GPa。在MC、BD和CS中发现了个体树木之间的显著差异。此外,径向变化从树皮侧到髓侧几乎是恒定的。结果表明,纵向E与生长特性无关,本研究中测试的茨瓦格里E.zwageri木材在径向上具有均匀的BD和CS。
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来源期刊
Tropics
Tropics ECOLOGY-
CiteScore
1.40
自引率
0.00%
发文量
7
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