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Mitscherlich式による森林の生長予測
http://hdl.handle.net/2261/22996
http://hdl.handle.net/2261/229961355ff85-41c3-428c-9b61-5c9afaf87b86
名前 / ファイル | ライセンス | アクション |
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esrh061003.pdf (3.5 MB)
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Item type | 紀要論文 / Departmental Bulletin Paper(1) | |||||
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公開日 | 2014-09-03 | |||||
タイトル | ||||||
タイトル | Mitscherlich式による森林の生長予測 | |||||
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 | |||||
その他のタイトル | ||||||
その他のタイトル | Growth Estimation of Forest by Mitscherlich's Low | |||||
著者 |
南雲, 秀次郎
× 南雲, 秀次郎× 佐藤, 健 |
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著者別名 | ||||||
識別子 | 55904 | |||||
識別子Scheme | WEKO | |||||
姓名 | NAGUMO, Hidejiro | |||||
著者別名 | ||||||
識別子 | 55905 | |||||
識別子Scheme | WEKO | |||||
姓名 | SATO, Takeshi | |||||
抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | Various formulas for the expression of the growth of the volume, height and diameter of the tree, have been designed empirically. In 1962, Dr. Suzuki succeeded in expressing the growth of trees very accurately by Mitscherlich's curve empirically. From this fact, the authors show a Model of tree growth as follows: 〓where a, b, c: constant x(t): the growth of trees at a time (t) f(t): productivity at a time (t) when f(t)=constant, the solution are (i) x(t)=α0+c1eαt+c2eβt b2-4ac>0 (ii) x(t)=α0+c1eαt+c2teαt b2-4ac=0 (iii) x(t)=eαt(c1cosβt+c2sinβt) b2-4ac<0 Here"x(t)" is the expression of tree growth, therefore solution (iii) is not our Model and solution (ii) is in very rare case, thus our model can be written as follows: x(t)=α0+c1eαt+c2eβt From this solution, we can conclude that the tree grows exponentially. Now the condition of "f(t)=const" is realistic in a closed forest, at α0=M, c1=-Meαt0 α=-k c2=0 x(t)=M(1-e-k(t-t0)) this is the Mitscherlich's formula, and it is Dr. Suzuki's model. On the prediction of the future tree growth by this formula, it gives us very good estimation in case of short period such as 5 years or so, but not so good in case of long period, because even in closed forest, productivity changes gradually. | |||||
書誌情報 |
東京大学農学部演習林報告 巻 61, p. 37-102, 発行日 1965 |
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ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 03716007 | |||||
書誌レコードID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AN00162451 | |||||
日本十進分類法 | ||||||
主題 | 610 | |||||
主題Scheme | NDC | |||||
出版者 | ||||||
出版者 | 東京大学大学院農学生命科学研究科附属演習林 | |||||
出版者別名 | ||||||
The Tokyo University Forests |