Within-tree and radial variations of wood properties in naturally regenerated trees of Betula platyphylla grown in Nikko, Japan

IF 1.3 Q2 MATERIALS SCIENCE, PAPER & WOOD
Togtokhbayar Erdene-Ochir, F. Ishiguri, I. Nezu, Bayasaa Tumenjargal, Murzabyek Sarkhad, J. Ohshima, S. Yokota
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引用次数: 5

Abstract

ABSTRACT Wood properties were investigated for nine naturally regenerated trees of Betula platyphylla Sukaczev var. japonica (Miq.) H. Hara in Nikko, Japan to effectively utilise the wood resources. The following properties were determined: stress-wave velocity of stems in radial direction, cell length, basic density, shrinkage, dynamic Young’s modulus, modulus of elasticity, modulus of rupture, absorbed energy in impact bending, and compressive strength parallel to grain. All examined wood properties increased from pith to bark. The boundary between core and outer wood determined by a 1.0% annual increment of cell lengths was well matched with that determined by radial variations of wood properties. Significant differences were found between the core and outer wood in several wood properties. Based on the results, it is concluded that when the wood of B. platyphylla is utilised as an industrial raw material, the presence of core and outer wood should be considered.
日本日光木天然再生树木材性质的树内和径向变化
摘要以白桦(Betula platyphylla Sukaczev var. japonica, Miq.)为材料,对9株自然再生树种的木材特性进行了研究。日本日光的原H.有效利用木材资源。测定了茎的径向应力波速度、胞体长度、基本密度、收缩率、动态杨氏模量、弹性模量、断裂模量、冲击弯曲吸收能量、平行于晶粒的抗压强度。所有被检查的木材性能从髓到树皮都有所增加。由细胞长度每年增加1.0%决定的核心和外部木材之间的边界与木材性质的径向变化决定的边界很好地匹配。芯材和外材在几种木材性能上存在显著差异。综上所述,在利用白桦木材作为工业原料时,应考虑其芯材和外材的存在。
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来源期刊
International Wood Products Journal
International Wood Products Journal MATERIALS SCIENCE, PAPER & WOOD-
CiteScore
2.40
自引率
0.00%
发文量
27
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