{"created":"2026-01-22T04:15:30.003820+00:00","id":2001341,"links":{},"metadata":{"_buckets":{"deposit":"e0b20106-546f-48c1-8acd-53c5801908f2"},"_deposit":{"created_by":19,"id":"2001341","owner":"19","owners":[19],"pid":{"revision_id":0,"type":"depid","value":"2001341"},"status":"published"},"_oai":{"id":"oai:iwate-u.repo.nii.ac.jp:02001341","sets":["1504:1510"]},"author_link":[],"control_number":"2001341","item_16_biblio_info_7":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2024","bibliographicIssueDateType":"Issued"},"bibliographicNumberOfPages":"9","bibliographicPageEnd":"9","bibliographicPageStart":"1","bibliographicVolumeNumber":"30","bibliographic_titles":[{"bibliographic_title":"Journal of Forest Planning","bibliographic_titleLang":"en"}]}]},"item_16_date_6":{"attribute_name":"登録日","attribute_value_mlt":[{"subitem_date_issued_datetime":"2026-01-22","subitem_date_issued_type":"Created"}]},"item_16_description_11":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"The vertical distribution of the cross-sectional area increment of the lower trunk in aged Sugi (Cryptomeria japonica) trees was analyzed using annual ring data from disks. We collected data from three approximately 90-year-old mature plantations under different density management and three old-growth stands of 160 years or more. Of the nine sample trees in the thinning experiment plots, only three had significantly higher cross-sectional area increments at a relative height of 0.2 × tree height (0.2h) than the mean cross-sectional area increment. This result did not strongly support the hypothesis that several trees in mature stands that are thinned regularly may show a heightening trend in the cross-sectional area increment of the lower trunk. In contrast, the cross-sectional area increment at 0.2h was significantly higher than the mean cross-sectional area increment for all three sample trees in the old-growth stands. A generalized linear mixed model with the presence or absence of a heightening trend in the cross-sectional area increment of the lower trunk as a response variable was used for 20 sample trees. The results showed that the model with the ratio of height to diameter at breast height (H/D ratio) and relative spacing index (Sr) as fixed effects was optimal. The probability of trees showing a heightening trend in the cross-sectional area increment of the lower trunk increased with a lower H/D ratio and a higher Sr at the most recent values. We estimated that if stand density is maintained at an Sr≥19%, where the forest canopy is sparse, a heightening trend of cross-sectional area increment at the lower part of the trunk occurs in trees with a H/D ratio of ≤71.","subitem_description_language":"en","subitem_description_type":"Abstract"}]},"item_16_publisher_14":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"Japan Society of Forest Planning","subitem_publisher_language":"en"}]},"item_16_relation_26":{"attribute_name":"DOI","attribute_value_mlt":[{"subitem_relation_type":"isIdenticalTo","subitem_relation_type_id":{"subitem_relation_type_id_text":"https://doi.org/10.20659/jfp.2023.001","subitem_relation_type_select":"DOI"}}]},"item_16_source_id_9":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"2189-8316","subitem_source_identifier_type":"EISSN"},{"subitem_source_identifier":"1341-562X","subitem_source_identifier_type":"PISSN"}]},"item_16_version_type_27":{"attribute_name":"著者版フラグ","attribute_value_mlt":[{"subitem_version_resource":"http://purl.org/coar/version/c_970fb48d4fbd8a85","subitem_version_type":"VoR"}]},"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":[{"creatorAffiliations":[{"affiliationNames":[{"affiliationName":"Iwate University","affiliationNameLang":"en"}]}],"creatorNames":[{"creatorName":"KUNISAKI, Takashi","creatorNameLang":"en","creatorNameType":"Personal"}],"creatorType":"著"},{"creatorAffiliations":[{"affiliationNames":[{"affiliationName":"Kyushu University","affiliationNameLang":"en"}]}],"creatorNames":[{"creatorName":"YOSHIDA, Shigejiro","creatorNameLang":"en","creatorNameType":"Personal"}],"creatorType":"著"}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_access","date":[{"dateType":"Available","dateValue":"2026-01-22"}],"filename":"jfp-v30p1-9.pdf","filesize":[{"value":"788 KB"}],"format":"application/pdf","mimetype":"application/pdf","url":{"label":"jfp-v30p1-9.pdf","objectType":"fulltext","url":"https://iwate-u.repo.nii.ac.jp/record/2001341/files/jfp-v30p1-9.pdf"},"version_id":"0910df9f-d665-4dbf-bff6-c98ad38f010d"}]},"item_keyword":{"attribute_name":"キーワード","attribute_value_mlt":[{"subitem_subject":"cross-sectional area","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"Cryptomeria japonica","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"lower trunk increment","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"mature trees","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"stem analysis","subitem_subject_language":"en","subitem_subject_scheme":"Other"}]},"item_language":{"attribute_name":"言語","attribute_value_mlt":[{"subitem_language":"eng"}]},"item_resource_type":{"attribute_name":"資源タイプ","attribute_value_mlt":[{"resourcetype":"journal article","resourceuri":"http://purl.org/coar/resource_type/c_6501"}]},"item_title":"Cross-sectional Area Increment of the Lower Trunk in Aged Sugi (Cryptomeria japonica) Trees : A Heightening Trend","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"Cross-sectional Area Increment of the Lower Trunk in Aged Sugi (Cryptomeria japonica) Trees : A Heightening Trend","subitem_title_language":"en"}]},"item_type_id":"16","owner":"19","path":["1510"],"pubdate":{"attribute_name":"PubDate","attribute_value":"2026-01-22"},"publish_date":"2026-01-22","publish_status":"0","recid":"2001341","relation_version_is_last":true,"title":["Cross-sectional Area Increment of the Lower Trunk in Aged Sugi (Cryptomeria japonica) Trees : A Heightening Trend"],"weko_creator_id":"19","weko_shared_id":-1},"updated":"2026-01-26T06:04:31.623120+00:00"}