{"created":"2021-03-01T06:13:41.122310+00:00","id":7047,"links":{},"metadata":{"_buckets":{"deposit":"3e0e1452-b8f6-4482-9596-c49e55f491ad"},"_deposit":{"id":"7047","owners":[],"pid":{"revision_id":0,"type":"depid","value":"7047"},"status":"published"},"_oai":{"id":"oai:nagoya.repo.nii.ac.jp:00007047","sets":["643:835:863:872"]},"author_link":["18987","18988"],"item_1615768549627":{"attribute_name":"出版タイプ","attribute_value_mlt":[{"subitem_version_resource":"http://purl.org/coar/version/c_970fb48d4fbd8a85","subitem_version_type":"VoR"}]},"item_9_alternative_title_19":{"attribute_name":"その他のタイトル","attribute_value_mlt":[{"subitem_alternative_title":"Theoretical studies on the time-trajectory of mean plant weight and density in self-thinning populations","subitem_alternative_title_language":"en"}]},"item_9_biblio_info_6":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"1996-12","bibliographicIssueDateType":"Issued"},"bibliographicPageEnd":"67","bibliographicPageStart":"51","bibliographicVolumeNumber":"15","bibliographic_titles":[{"bibliographic_title":"名古屋大学農学部演習林報告","bibliographic_titleLang":"ja"}]}]},"item_9_description_4":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"自己間引き個体群の競争密度効果(時間断面での現象)は、C-D効果の一般逆数式で記述される。一方、生育の進んだ個体群の自己間引き(時間方向での現象)は3/2乗則に従う。以上の2つの知見を仮定することにより、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において未知関数であった実現密度 - 初期密度関係の係数ε、C-D効果の一般逆数式の係数A_t及び最終収量Yを生物学的時間の関数として明確に定義することが出来た。どんな初期密度から出発した個体群の密度も、生育が進むと生物学的時間に対して指数関数減少をすることが理論的に予測され、個体数の指数関数減少を起こしている個体群こそが3/2乗則に従う個体群であった。任意の初期密度から出発した個体群の生育に伴う平均個体重と密度とが示す軌跡を、密度効果と矛盾することなく説明する理論式が導かれた。この理論式により、死亡率が高いほど密度効果は顕れにくく、一方、死亡率が低いほど密度効果は顕著になることが予測された。理論式に対する近似式の相対誤差が調べられ、実際の平均個体重 - 密度の軌跡を表すのに、実用面からはこの近似式で十分満足のいくものであると判断された。","subitem_description_language":"ja","subitem_description_type":"Abstract"},{"subitem_description":"The competition-density effect in self-thinning populations can be described by the general reciprocal equation of the C-D effect (Eq.(7)), which is derived from the logistic theory of the density effect in self-thinning populations. On the other hand, any populations starting with different initial densities tend to follow the 2/3 power law of self-thinning (Eq.(11)) with time. Based on the assumption of the two phenomena, unknown functions in the logistic theory, such as the coefficient ε (Eq.(21)) of the relationship between realized density ρ and initial density ρ_1 (Eq. (5)), the coefficient A_t (Eq.(25)), Fig. 2) of the general reciprocal equation and the final yield Y (Eq. (34)) could be defined as explicit functions of biological time γ (Eq.9). A theoretical conclusion with respect to density-dependent mortality (Eq.(23)) was that any population is supposed to exponentially decrease its constituents after a sufficient lapse of γ (Fig.1), and it was just the populations decreasing exponentially in number that follow the 3/2 power law of self-thinning. A theoretical equation (Eq.(31)), which was derived by unifying the density effect and the 3/2 power law of self-thinning (Fig.7), well mimicked the trajectory of mean plant weight ω and density ρ during the course of self-thinning (Fig.4). The theoretical equation stated that higher values of mortality μ play an important role in relieving intraspecific competition. The relative error of estimates from a proposed approximation equation (Eq.6367) to those from the theoretical equation was examined (Fig.9). As a result, it was concluded from a practical viewpoint that the approximation equation is satisfactorily applicable to actual ω‐ρ trajectories (Fig.10).","subitem_description_language":"en","subitem_description_type":"Abstract"}]},"item_9_description_5":{"attribute_name":"内容記述","attribute_value_mlt":[{"subitem_description":"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。","subitem_description_language":"ja","subitem_description_type":"Other"}]},"item_9_identifier_60":{"attribute_name":"URI","attribute_value_mlt":[{"subitem_identifier_type":"HDL","subitem_identifier_uri":"http://hdl.handle.net/2237/8719"}]},"item_9_identifier_registration":{"attribute_name":"ID登録","attribute_value_mlt":[{"subitem_identifier_reg_text":"10.18999/bulnuf.15.51","subitem_identifier_reg_type":"JaLC"}]},"item_9_publisher_32":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"名古屋大学農学部付属演習林","subitem_publisher_language":"ja"}]},"item_9_relation_43":{"attribute_name":"関連情報","attribute_value_mlt":[{"subitem_relation_type":"isVersionOf","subitem_relation_type_id":{"subitem_relation_type_id_text":"http://rms1.agsearch.agropedia.affrc.go.jp/contents/JASI/pdf/academy/56-1687.pdf","subitem_relation_type_select":"URI"}}]},"item_9_select_15":{"attribute_name":"著者版フラグ","attribute_value_mlt":[{"subitem_select_item":"publisher"}]},"item_9_source_id_7":{"attribute_name":"ISSN（print）","attribute_value_mlt":[{"subitem_source_identifier":"0469-4708","subitem_source_identifier_type":"PISSN"}]},"item_9_text_14":{"attribute_name":"フォーマット","attribute_value_mlt":[{"subitem_text_value":"application/pdf"}]},"item_access_right":{"attribute_name":"アクセス権","attribute_value_mlt":[{"subitem_access_right":"open access","subitem_access_right_uri":"http://purl.org/coar/access_right/c_abf2"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"萩原, 秋男","creatorNameLang":"ja"}],"nameIdentifiers":[{"nameIdentifier":"18987","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"HAGIHARA, Akio","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"18988","nameIdentifierScheme":"WEKO"}]}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2018-02-19"}],"displaytype":"detail","filename":"bulnuf_15_51.pdf","filesize":[{"value":"1.3 MB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"bulnuf_15_51.pdf","objectType":"fulltext","url":"https://nagoya.repo.nii.ac.jp/record/7047/files/bulnuf_15_51.pdf"},"version_id":"da23cf2e-d318-4198-b6a1-805d7c99c20f"}]},"item_keyword":{"attribute_name":"キーワード","attribute_value_mlt":[{"subitem_subject":"密度効果","subitem_subject_scheme":"Other"},{"subitem_subject":"密度依存的な枯死","subitem_subject_scheme":"Other"},{"subitem_subject":"C-D効果の一般逆数式","subitem_subject_scheme":"Other"},{"subitem_subject":"ロジスチック理論","subitem_subject_scheme":"Other"},{"subitem_subject":"平均個体重 - 密度の軌跡","subitem_subject_scheme":"Other"},{"subitem_subject":"自己間引きの3/2乗則","subitem_subject_scheme":"Other"},{"subitem_subject":"density-dependent mortality","subitem_subject_scheme":"Other"},{"subitem_subject":"density effect","subitem_subject_scheme":"Other"},{"subitem_subject":"general reciprocal equation of the C-D effect","subitem_subject_scheme":"Other"},{"subitem_subject":"logistic theory","subitem_subject_scheme":"Other"},{"subitem_subject":"mean plant weight-density trajectory","subitem_subject_scheme":"Other"},{"subitem_subject":"the 3/2 power law of self-thinning","subitem_subject_scheme":"Other"}]},"item_language":{"attribute_name":"言語","attribute_value_mlt":[{"subitem_language":"jpn"}]},"item_resource_type":{"attribute_name":"資源タイプ","attribute_value_mlt":[{"resourcetype":"departmental bulletin paper","resourceuri":"http://purl.org/coar/resource_type/c_6501"}]},"item_title":"自己間引き個体群における平均個体重 - 密度の軌跡に関する理論的研究","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"自己間引き個体群における平均個体重 - 密度の軌跡に関する理論的研究","subitem_title_language":"ja"}]},"item_type_id":"9","owner":"1","path":["872"],"pubdate":{"attribute_name":"PubDate","attribute_value":"2007-09-03"},"publish_date":"2007-09-03","publish_status":"0","recid":"7047","relation_version_is_last":true,"title":["自己間引き個体群における平均個体重 - 密度の軌跡に関する理論的研究"],"weko_creator_id":"1","weko_shared_id":-1},"updated":"2023-01-16T03:52:24.668867+00:00"}