Properties of Juvenile and Mature Wood and Their Effects on the Bending Properties of Lumber in Pinus taeda Growing in Tochigi, Japan
2016
Tanabe, Jun | Ishiguri, Futoshi | Nakayama, Miki | Ohshima, Jyunichi | lizuka, Kazuya | Yokota, Shiso
Five 40-year-old Pinus taeda trees growing in Tochigi, Japan, were used to evaluate juvenile wood (JW) and mature wood (MW) properties and the bending properties of lumber. The boundary between JW and MW existed from the 14th to the 19th ring from pith in the sample trees. There were obvious differences in wood properties between the JW and MW: the MW had higher values in the latewood percentage and basic density and lower values in the microfibril angle. The microfibril angle and the air-dry density were closely related to the bending properties of the JW lumber and the MW lumber, respectively.
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