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樹木の回旋性について：第一報 カラマツ樹幹の繊維回旋
http://hdl.handle.net/10091/13899
http://hdl.handle.net/10091/13899af238640-d54d-4053-8cc6-d171de780455
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
Bulletin_Agri-01-04.pdf (846.3 kB)
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| Item type | 紀要論文 / Departmental Bulletin Paper(1) | |||||||||
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| 公開日 | 2012-03-07 | |||||||||
| タイトル | ||||||||||
| タイトル | 樹木の回旋性について：第一報 カラマツ樹幹の繊維回旋 | |||||||||
| タイトル | ||||||||||
| タイトル | Studies on twisted fibre in trees: Ⅰ. How varies the angle of twist in Larix Kaempferi, Sarg | |||||||||
| 言語 | ||||||||||
| 言語 | jpn | |||||||||
| 資源タイプ | ||||||||||
| 資源 | http://purl.org/coar/resource_type/c_6501 | |||||||||
| タイプ | departmental bulletin paper | |||||||||
| 著者 |
大倉, 精二
× 大倉, 精二
× 鳥山, 淸美
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| 出版者 | ||||||||||
| 出版者 | 信州大学農学部 | |||||||||
| 引用 | ||||||||||
| 内容記述 | 信州大学農学部学術報告 1: 28-35(1952) | |||||||||
| 書誌情報 |
信州大学農学部学術報告 巻 1, p. 28-35, 発行日 1952-03-31 |
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| 抄録 | ||||||||||
| 内容記述 | The twisted fibre is a significant defect in Karamatsu (Larix Kaempferi, Sarg. ), which is regarded as one of the most promising trees in this country. This phenomenon of twisted fibre is thoroughly examined by H.G. Champion in India from the silvicultural point of view, whom we are obliged to his kindness sending records of his former works. Our interest was chiefly destinated to observe how varies the angle of twist inward of trunks. The method of P. Misra was not adopted, not because of its technical difficulties but of taking much time to pursue. Disks, 10cm in thickness, were cut down from timbers for test at several portions. (TABLE II) On both end of them, two paralled diameter were drawn. They were split through their centers by a iron blade specially made for this purpose. Spliting just along the diameters of top end, curves were gotten at the base because of the twist of the timber. (FIG. I) Angles of twist 0 were obtained from the arc-length of year rings l and the thicknesss of disks h. 0=tan-1 l/h TABLE II,III-A, B and FIG. III-A, B, C, V, VI seem to tell us as follows: -As for the angle of twist in the trunks of Larix Kaempferi concern, 〔1〕 there is a portion of maximum value corespond to the age of tissue. 〔2〕 The value exists near the tree-axis in infant stage. 〔3〕 As the tree becomes older, it tends to move centrifugally towards the top of the tree. 〔4〕 As the tree grows older, its absolute value becomes more and more larger. | |||||||||
| 資源タイプ（コンテンツの種類） | ||||||||||
| ISSN | ||||||||||
| 収録物識別子タイプ | ISSN | |||||||||
| 収録物識別子 | 0559-8605 | |||||||||
| 書誌レコードID | ||||||||||
| 収録物識別子タイプ | NCID | |||||||||
| 収録物識別子 | AN00121341 | |||||||||
| 出版タイプ | ||||||||||
| 出版タイプ | VoR | |||||||||
| 出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||||||
