| アイテムタイプ |
itemtype_ver1(1) |
| 公開日 |
2025-05-27 |
| タイトル |
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|
タイトル |
Examination of SWIR hyperspectral imaging for estimating corewood – outerwood transition age for Douglas-fir grown at different planting densities |
|
言語 |
en |
| 著者 |
Onakpoma, Ighoyivwi
Ma, Te
Schimleck, Laurence R.
Inagaki, Tetsuya
Tsuchikawa, Satoru
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| アクセス権 |
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アクセス権 |
open access |
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アクセス権URI |
http://purl.org/coar/access_right/c_abf2 |
| 権利 |
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|
権利情報 |
“This is an [Accepted Manuscript] of an article published by De Gruyter in [Holzforschung] on [2025-03-26], available at http://wwww.degruyter.com/10.1515/hf-2024-0058. |
|
言語 |
en |
| 内容記述 |
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|
内容記述タイプ |
Abstract |
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内容記述 |
Silvicultural practices, particularly planting density (PD), significantly affect the wood quality of plantation-grown trees by influencing the age of transition from corewood to outerwood. Determining transition age (TA) is challenging. Near infrared hyperspectral imaging was used to assess the age of transition from corewood to outerwood in Douglas-fir (Pseudotsuga menziesii) grown under different PD. Wood samples were taken from permanent research plots with six PD ranging from 2,990 to 248 stems/hectare. Twenty trees were destructively sampled at age 25, and wood discs were collected at 10 % of total tree height. Pith-to-bark radial strips obtained from each disc were scanned using a compovision hyperspectral imaging system (1,002–2,350 nm). Partial least square discriminant analysis (PLS-DA) models were fitted to approximate TA using hyperspectral data representative of corewood and outerwood. PD influenced TA and the duration over which it occurred. Average age of transition was estimated to vary from 10 (closest spacing) to 14 years (widest). Closely spaced trees exhibited an abrupt transition, while widely spaced trees had a more gradual transition. However, PLS-DA likely underestimated the transition duration for widely spaced trees, as their average ring densities did not yet match those typical of outerwood based on X-ray densitometry data. |
|
言語 |
en |
| 出版者 |
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出版者 |
Walter de Gruyter |
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言語 |
en |
| 言語 |
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|
言語 |
eng |
| 資源タイプ |
|
|
資源タイプresource |
http://purl.org/coar/resource_type/c_6501 |
|
タイプ |
journal article |
| 出版タイプ |
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|
出版タイプ |
AM |
|
出版タイプResource |
http://purl.org/coar/version/c_ab4af688f83e57aa |
| 関連情報 |
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|
関連タイプ |
isVersionOf |
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|
識別子タイプ |
DOI |
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|
関連識別子 |
https://doi.org/10.1515/hf-2024-0058 |
| 収録物識別子 |
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収録物識別子タイプ |
PISSN |
|
収録物識別子 |
0018-3830 |
| 書誌情報 |
en : Holzforschung
巻 79,
号 2-3,
p. 93-101,
発行日 2025-03-26
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| ファイル公開日 |
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|
日付 |
2026-03-26 |
|
日付タイプ |
Available |
Onakpoma_et_al_Holzforschung_Final-Updated_New_Dec192024.pdf (3.6 MB)
