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  1. 紀要論文
  2. 琉球大学理学部紀要
  3. 64号
  1. 部局別インデックス
  2. 理学部

A Note on the Fundamental Equation of Self-Thinning in the Logistic Theory of Plant Growth

http://hdl.handle.net/20.500.12000/11819
http://hdl.handle.net/20.500.12000/11819
68d254ea-79d4-4987-9a43-816f0b883af1
名前 / ファイル ライセンス アクション
No64p069.pdf No64p069.pdf
Item type デフォルトアイテムタイプ(フル)(1)
公開日 2009-08-13
タイトル
タイトル A Note on the Fundamental Equation of Self-Thinning in the Logistic Theory of Plant Growth
言語 en
作成者 Hagihara, Akio

× Hagihara, Akio

en Hagihara, Akio

萩原, 秋男

× 萩原, 秋男

ja 萩原, 秋男

アクセス権
アクセス権 open access
アクセス権URI http://purl.org/coar/access_right/c_abf2
内容記述
内容記述タイプ Other
内容記述 The fundamental equation of self-thinning, which was proposed in the logistic theory of\nplant growth for describing the density effect in self-thinning populations, is based on\nthe following two fundamental assumptions: one is that the growth of mean phytomass w\nfollows a general logistic equation; the other is that the final yield Y(t), which is pre\nscribed as the product of the asymptote of mean phytomass W(t) and density P , becomes\nconstant irrespective of P , i.e. the law of constant final yield is assumed. In the light\nof the basic principle of self-thinning that the relative growth rate of mean phytomass\n(l/u>) (dw/dt) is given by the sum of the relative growth rate of yield (1/y) (dy/dt) and\nthe relative mortality (-1/P) (dP/dt), the first assumption brings to the conclusion that the\nfinal yield Y(t) is not prescribed by W{t) P , but is prescribed by(l-tn/A (t))W(t) P\n(ro, relative mortality; A (f), coefficient of growth), whose value depends on density P\nexcept for the special case where both Wit) P and m are independent of P. This inevitable\nconsequence is in conflict with the prescription referring to the final yield Y(t) in the\nsecond assumption of the logistic theory of plant growth. As a result, it is suggested\nthat an alternative theory for the density effect in self-thinning populations should be\nnewly constructed to harmonize the assumption referring to the growth of mean phytomass\nwith the assumption referring to the law of constant final yield.
内容記述タイプ Other
内容記述 紀要論文
出版者
言語 ja
出版者 琉球大学理学部
言語
言語 eng
資源タイプ
資源タイプ departmental bulletin paper
資源タイプ識別子 http://purl.org/coar/resource_type/c_6501
出版タイプ
出版タイプ VoR
出版タイプResource http://purl.org/coar/version/c_970fb48d4fbd8a85
識別子
識別子 http://hdl.handle.net/20.500.12000/11819
識別子タイプ HDL
収録物識別子
収録物識別子タイプ ISSN
収録物識別子 0286-9640
収録物識別子タイプ NCID
収録物識別子 AN00250774
収録物名
言語 ja
収録物名 琉球大学理学部紀要
書誌情報
号 64, p. 69-76
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