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Articles by Ikumi Nezu

Category: Research article

article id 10284, category Research article
Togtokhbayar Erdene-Ochir , Futoshi Ishiguri, Ikumi Nezu, Bayasaa Tumenjargal, Bayartsesteg Baasan, Ganbaatar Chultem, Jyunichi Ohshima, Shinso Yokota. (2020). Utilization potential of naturally regenerated Mongolian Betula platyphylla wood based on growth characteristics and wood properties. Silva Fennica vol. 54 no. 3 article id 10284. https://doi.org/10.14214/sf.10284
Keywords: basic density; stress-wave velocity; compressive strength; early evaluation
Highlights: Wood with high density and high compressive strength can be obtained near to the bark of Betula platyphylla trees; Basic density of B. platyphylla wood may be predicted by the stress-wave velocity of stems; Growth characteristics are positively correlated with stress-wave velocity and basic density; Early evaluation of basic density is possible when using the wood at 2 cm from the pith: A significant between-site variation was found in the basic density at the position from the 1st to the 15th annual ring from the pith; Wood from B. platyphylla trees grown in Mongolia may be used for industrial products equally to the same species in other countries.
Abstract | Full text in HTML | Full text in PDF | Author Info

To preliminary evaluate the potential wood utilization of Betula platyphylla Sukaczev trees naturally regenerated in Mongolia, growth characteristics (stem diameter and tree height), wood properties (annual ring width, basic density, and compressive strength parallel to grain at the green condition) of core samples, and stress-wave velocity in stems were investigated for Betula platyphylla trees grown naturally in three different sites in Selenge, Mongolia. Betula platyphylla trees, naturally grown in Nikko, Japan, were also examined to compare wood properties between the two regions. The mean values of stem diameter, tree height, stress-wave velocity of stems, annual ring width, basic density, and compressive strength parallel to grain at green condition in Mongolian B. platyphylla were 17.6 cm, 14.1 m, 3.50 km s–1, 1.27 mm, 0.51 g cm–3, and 20.4 MPa, respectively. Basic density and compressive strength were decreased first from the pith, and then gradually increased toward the bark. The wood properties of B. platyphylla trees grown naturally in Mongolia were similar to those in B. platyphylla trees grown in Japan. Growth characteristics, especially stem diameter, were positively correlated with the stress-wave velocity of stems and basic density. Early evaluation of basic density in B. platyphylla trees is possible by using wood located 2 cm from the pith. Basic density at the position from the 1st to the 15th annual ring from the pith showed significant between-site differences in Mongolian B. platyphylla. Based on the results, it is concluded that the wood of B. platyphylla trees grown in Mongolia may be used for industrial products as well as those from similar species in other countries.

  • Erdene-Ochir , School of Agriculture, Utsunomiya University, Utsunomiya, Tochigi 321-8505, Japan; United Graduate School of Agricultural Science, Tokyo University of Agriculture and Technology, Fuchu, Tokyo 183-8509, Japan; Training and Research Institute of Forestry and Wood Industry, Mongolian University of Science and Technology, Ulaanbaatar 14191, Mongolia E-mail: togtokhbayarerdeneochir@gmail.com
  • Ishiguri, School of Agriculture, Utsunomiya University, Utsunomiya, Tochigi 321-8505, Japan E-mail: ishiguri@cc.utsunomiya-u.ac.jp (email)
  • Nezu, School of Agriculture, Utsunomiya University, Utsunomiya, Tochigi 321-8505, Japan E-mail: zoo-sk3.primo@outlook.jp
  • Tumenjargal, School of Agriculture, Utsunomiya University, Utsunomiya, Tochigi 321-8505, Japan; United Graduate School of Agricultural Science, Tokyo University of Agriculture and Technology, Fuchu, Tokyo 183-8509, Japan; Training and Research Institute of Forestry and Wood Industry, Mongolian University of Science and Technology, Ulaanbaatar 14191, Mongolia E-mail: t_bayasaa88@yahoo.com
  • Baasan, Training and Research Institute of Forestry and Wood Industry, Mongolian University of Science and Technology, Ulaanbaatar 14191, Mongolia E-mail: bayartsetseg@must.edu.mn
  • Chultem, Training and Research Institute of Forestry and Wood Industry, Mongolian University of Science and Technology, Ulaanbaatar 14191, Mongolia E-mail: ganbaatar_ch@must.edu.mn
  • Ohshima, School of Agriculture, Utsunomiya University, Utsunomiya, Tochigi 321-8505, Japan E-mail: joshima@cc.utsunomiya-u.ac.jp
  • Yokota, School of Agriculture, Utsunomiya University, Utsunomiya, Tochigi 321-8505, Japan E-mail: yokotas@cc.utsunomiya-u.ac.jp

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