Physical and mechanical properties of wood and their geographic variations in Larix sibirica trees naturally grown in Mongolia.
Bayasaa Tumenjargal,Bayasaa Tumenjargal,Futoshi Ishiguri,Haruna Aiso,Yusuke Takahashi,Ikumi Nezu,Yuya Takashima,Bayartsetseg Baasan,Ganbaatar Chultem,Jyunichi Ohshima,Shinso Yokota +10 more
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In this paper, the physical and mechanical properties of wood in Siberian larch (Larix sibirica) trees that grow naturally in five Mongolian provenances (Khentii, Arkhangai, Zavkhan, Khuvsgul, and Selenge) and the geographic variations between them were examined.Abstract:
We examined the physical and mechanical properties of wood in Siberian larch (Larix sibirica) trees that grow naturally in five Mongolian provenances (Khentii, Arkhangai, Zavkhan, Khuvsgul, and Selenge) and the geographic variations between them. Five trees with stem diameters of 20 to 30 cm at 1.3 m above ground were collected from each provenance. The mean values of the modulus of elasticity (MOE), modulus of rupture (MOR), compressive strength parallel to grain (CS), and shearing strength (SS) ranged from 7.03 to 9.51 GPa, 79.8 to 103.9 MPa, 46.3 to 51.1 MPa, and 10.4 to 13.0 MPa, respectively. Significant differences were found in radial and tangential shrinkage, MOE, MOR, and SS in wood among the five provenances. In addition, juvenile wood had inferior physical and mechanical properties in comparison to mature wood within and among provenances. Furthermore, there were significant differences in all examined properties, except for CS, in mature wood among the five provenances. Higher correlation coefficients were also obtained in mature wood among all mechanical properties, except for SS.read more
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Modeling of radial variations in wood properties and comparison of juvenile and mature wood of four common conifers in Mongolia
Murzabyek Sarkhad,Murzabyek Sarkhad,Murzabyek Sarkhad,Futoshi Ishiguri,Ikumi Nezu,Ikumi Nezu,Bayasaa Tumenjargal,Yusuke Takahashi,Yusuke Takahashi,Yusuke Takahashi,Bayartsetseg Baasan,Ganbaatar Chultem,Jyunichi Ohshima,Shinso Yokota +13 more
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Annotation of Siberian Larch (Larix sibirica Ledeb.) Nuclear Genome—One of the Most Cold-Resistant Tree Species in the Only Deciduous GENUS in Pinaceae
Eugeniya I. Bondar,Sergey Feranchuk,Ksenia A. Miroshnikova,Vadim V. Sharov,Dmitry A. Kuzmin,N. V. Oreshkova,Konstantin V. Krutovsky +6 more
TL;DR: Comparative analysis of functional gene categories across different angiosperm and gymnosperm species finds that the Siberian larch genome has an overabundance of genes associated with programmed cell death, autophagy, stress hormone biosynthesis and regulatory pathways; genes that may play important roles in seasonal senescence and stress response to extreme cold in larch.
Journal ArticleDOI
Radial variations of broad-sense heritability in wood properties and classification of load–deflection curves in static bending for six half-sib families of Chamaecyparis obtusa
Yusuke Takahashi,Futoshi Ishiguri,Ikumi Nezu,Ryota Endo,Saki Kobayashi,Jun Tanabe,Michinari Matsushita,Jyunichi Ohshima,Shinso Yokota +8 more
TL;DR: In this paper , the authors measured 34-year-old Chamaecyparis obtusa trees of six half-sib families from pith to bark to clarify radial variations in inheritance of these traits and the relationships between wood properties and mechanical properties.
Journal ArticleDOI
Radial variations of broad-sense heritability in wood properties and classification of load–deflection curves in static bending for six half-sib families of Chamaecyparis obtusa
Yusuke Takahashi,Futoshi Ishiguri,Ikumi Nezu,Ryota Endo,Saki Kobayashi,Jun Tanabe,Michinari Matsushita,Jyunichi Ohshima,Shinso Yokota +8 more
TL;DR: In this paper , the authors measured 34-year-old Chamaecyparis obtusa trees of six half-sib families from pith to bark to clarify radial variations in inheritance of these traits and the relationships between wood properties and mechanical properties.
Journal ArticleDOI
Model-Based Identification of Larix sibirica Ledeb. Damage Caused by Erannis jacobsoni Djak. Based on UAV Multispectral Features and Machine Learning
Lei Ma,Xiaojun Huang,Quan Hai,Bao Gang,Siqin Tong,Yuhai Bao,Ganbat Dashzebeg,Tsagaantsooj Nanzad,Altanchimeg Dorjsuren,Davaadorj Enkhnasan,Mungunkhuyag Ariunaa +10 more
TL;DR: In this article , the authors developed a model for identifying the degree of damage to forest trees caused by Erannis jacobsoni Djak (EJD) by calculating UAV multispectral vegetation indices (VIs) and texture features (TF).
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Journal ArticleDOI
Diverging climate trends in Mongolian taiga forests influence growth and regeneration of Larix sibirica
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TL;DR: Since declines of productivity and regeneration are more widespread in the Mongolian taiga than the opposite trend, a net loss of forests is likely to occur in the future, as strong increases in temperature and regionally differing changes in precipitation are predicted for the twenty-first century.