Tree and stand characteristics associated with the occurrence of false heartwood in individual Japanese white birch trees

Nakaya, Akira; Osaki, Hisashi; Ohno, Yasuyuki; Yoshida, Toshiya

Tree and stand characteristics associated with the occurrence of false heartwood in individual Japanese white birch trees

Nakaya, Akira; Osaki, Hisashi; Ohno, Yasuyuki et al.

Canadian journal of forest research, 2024, 54(5), 601-610

Permalink : https://hdl.handle.net/2115/97184

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アクセス権	open access
URI	https://hdl.handle.net/2115/97184
タイトル	Tree and stand characteristics associated with the occurrence of false heartwood in individual Japanese white birch trees
著者	Nakaya, Akira ; Osaki, Hisashi ; Ohno, Yasuyuki ; Yoshida, Toshiya
著者名 Nakaya, Akira
著者名 Osaki, Hisashi
e-Rad_Researcher 30414246 著者名 Ohno, Yasuyuki
e-Rad_Researcher 60312401 著者名 Yoshida, Toshiya
言語	英語
キーワード	Betula platyphylla
	wood discoloration
	wood properties
	structural equation modeling
	standing tree characteristics
発行日	2024-04-05
出版者	Canadian science publishing
収録物名	Canadian journal of forest research
巻(号)	54(5)
ページ	601-610
ページ数	10
抄録	New wood uses of Japanese white birch (Betula platyphylla var. japonica) have attracted much attention in recent years, but false heartwood has led to a decline in commercial value due to its irregular wood color. In this study, we assessed the occurrence of false heartwood and its proportion to stem cross-sectional area (PFH) in individual Japanese white birch (482 trees) in a ca. 70year -old natural secondary forest. Specifically, we investigated the relative strength of the direct/indirect effects of individual size (BA), growth rate (GR), crown ratio (CR), number of branch scars (NBS), basal area sum of neighboring trees (BAS) and topographic wetness index (TWI) on PFH. In total, 80.3% of trees had false heartwood. CR was found to be the most important factor, acting through direct and indirect negative effects. BA and NBS had a positive effect, and TWI had a negative effect on PFH. BA had a positive correlation with tree age, indicating that PFH can be reduced in trees with faster growth. Simultaneously, BAS had an indirect positive effect on PFH. These results suggested that thinning, which reduces BAS and increases CR, can reduce false heartwood.
資源タイプ	学術雑誌論文
出版タイプ	Accepted Manuscript
PISSN	0045-5067
関連情報 (isVersionOf)	出版社版DOI https://doi.org/10.1139/cjfr-2023-0213