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Physical and mechanical properties of wood and their geographic variations in Larix sibirica trees naturally grown in Mongolia.

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.

journal_name

Sci Rep

journal_title

Scientific reports

authors

Tumenjargal B,Ishiguri F,Aiso H,Takahashi Y,Nezu I,Takashima Y,Baasan B,Chultem G,Ohshima J,Yokota S

doi

10.1038/s41598-020-69781-7

subject

Has Abstract

pub_date

2020-07-31 00:00:00

pages

12936

issue

1

issn

2045-2322

pii

10.1038/s41598-020-69781-7

journal_volume

10

pub_type

杂志文章

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