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  1. B300 農学部/生命農学研究科
  2. B300b 紀要
  3. 名古屋大学農学部演習林報告
  4. 15

自己間引き個体群における密度効果のロジスチック理論

https://doi.org/10.18999/bulnuf.15.31
https://doi.org/10.18999/bulnuf.15.31
890bba72-cf82-4504-9383-824daada780c
名前 / ファイル ライセンス アクション
bulnuf_15_31.pdf bulnuf_15_31.pdf (1.7 MB)
Item type 紀要論文 / Departmental Bulletin Paper(1)
公開日 2007-09-03
タイトル
タイトル 自己間引き個体群における密度効果のロジスチック理論
言語 ja
その他のタイトル
その他のタイトル Logistic theory of the density effect in self-thinning populations
言語 en
著者 萩原, 秋男

× 萩原, 秋男

WEKO 18977

ja 萩原, 秋男

Search repository
HAGIHARA, Akio

× HAGIHARA, Akio

WEKO 18978

en HAGIHARA, Akio

Search repository
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
キーワード
主題Scheme Other
主題 密度依存的な枯死
キーワード
主題Scheme Other
主題 密度効果
キーワード
主題Scheme Other
主題 一般ロジスチック曲線
キーワード
主題Scheme Other
主題 逆数式
キーワード
主題Scheme Other
主題 自己間引き個体群
キーワード
主題Scheme Other
主題 最終収量一定の法則
キーワード
主題Scheme Other
主題 density-dependent mortality
キーワード
主題Scheme Other
主題 density effect
キーワード
主題Scheme Other
主題 general logistic equation
キーワード
主題Scheme Other
主題 reciprocal equation
キーワード
主題Scheme Other
主題 self-thinning population
キーワード
主題Scheme Other
主題 the law of constant final yield
抄録
内容記述 自己間引きのない個体群の密度効果を対象とする植物生長のロジスチック理論は、平均個体重の成長が一般ロジスチック曲線に従うこと及び最終収量一定の法則の2つの基本仮定より構成されている。植物生長のロジスチック理論を自己間引きのある個体群の密度効果に適用しようとすると、この2つの基本仮定間で調和がとれなくなる。しかし、植物生長のロジスチック理論では、自己間引きのために初期密度と実現密度との関係式を準備していた。この式を考慮し、植物生長のロジスチック理論を自己間引き個体群の密度効果をも扱える理論として整備した。自己間引き個体群における密度効果のロジスチック理論は、収量の成長が一般ロジスチック曲線に従うとする仮定、最終収量一定の法則の仮定及び実現密度と初期密度とに関する仮定の3つの基本仮定より構成される。この理論より結論される平均個体重ωと実現密度ρとの間に成立するC-D効果の逆数式(1/ω=A_t ρ+B)は、植物生長のロジスチック理論において準備されていた初期密度と実現密度との関係式を誘導するための2つの基礎仮定の内の1つの式そのものであった。今まで、自己間引きのある個体群においても平均個体重と実現密度との間に逆数式が成立するとされてきたが、その逆数式は自己間引き個体群における密度効果のロジスチック理論より結論される逆数式であるとすると矛盾がないことになる。
言語 ja
内容記述タイプ Abstract
抄録
内容記述 The logistic theory of plant growth, which deals with the density effect in nonself-thinning populations, consists of the following two basic assumptions : the growth of mean plant weight ω follows a general logistic equation (Eq. (4)) ; and the final yield Y(t)(=W(t)ρ) becomes constant independent of density ρ. It was concluded that these two assumptions are in conflict with each other, in case the logistic theory of plant growth is applied to the density effect in self-thinning populations. However, a functional relationship between realized density and initial density is provided for self-thinning in the logistic theory of plant growth. Considering the functional relationship, the logistic theory of plant growth was reconstructed to be applicable for the density effect in self-thinning populations. The present theory consists of the following three basic assumptions : the yield y follows a general logistic equation (Eq. (16)) ; the law of constant final yield holds ; and there exists a functional relationship between realized density ρ and initial density ρ_1 (Eq.(2), Fig. 3). The resultant reciprocal equation of the C-D effect (Eq.(26)) was consistent with one of the two assumptions from which the functional relationship of realized density to initial density is derived. Although the reciprocal equation in self-thinning populations was the same in form as that (Eq. (1)) in nonself-thinning populations, the coefficient A_t (Eq. (24)) in self-thinning populations was quite different in implication from the coefficient A (Eq. (11)) in nonself-thinning populations. The present conclusion is supported by the empirical fact that the reciprocal equation is discernible in not only nonself-thinning but also self-thinning populations. It is reasonable to think that the reciprocal equation is in reality one derived from the logistic theory of the density effect in self-thinning populations.
言語 en
内容記述タイプ Abstract
内容記述
内容記述 農林水産研究情報センターで作成したPDFファイルを使用している。
言語 ja
内容記述タイプ Other
出版者
言語 ja
出版者 名古屋大学農学部付属演習林
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
出版タイプ
出版タイプ VoR
出版タイプResource http://purl.org/coar/version/c_970fb48d4fbd8a85
ID登録
ID登録 10.18999/bulnuf.15.31
ID登録タイプ JaLC
関連情報
関連タイプ isVersionOf
識別子タイプ URI
関連識別子 http://rms1.agsearch.agropedia.affrc.go.jp/contents/JASI/pdf/academy/56-1686.pdf
ISSN(print)
収録物識別子タイプ PISSN
収録物識別子 0469-4708
書誌情報 ja : 名古屋大学農学部演習林報告

巻 15, p. 31-50, 発行日 1996-12
フォーマット
application/pdf
著者版フラグ
値 publisher
URI
識別子 http://hdl.handle.net/2237/8714
識別子タイプ HDL
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