{"created":"2021-03-01T06:43:20.006665+00:00","id":25379,"links":{},"metadata":{"_buckets":{"deposit":"1edb53d2-a60a-43d8-a44f-c8d0487bf75b"},"_deposit":{"id":"25379","owners":[],"pid":{"revision_id":0,"type":"depid","value":"25379"},"status":"published"},"_oai":{"id":"oai:repository.dl.itc.u-tokyo.ac.jp:00025379","sets":["27:2466:2467:2539","9:504:2469:2540"]},"item_4_alternative_title_1":{"attribute_name":"その他のタイトル","attribute_value_mlt":[{"subitem_alternative_title":"Age of Yezo-Spruce Killed by Beetles and Their Growth before and after Selection Cuttings"}]},"item_4_biblio_info_7":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"1999","bibliographicIssueDateType":"Issued"},"bibliographicPageEnd":"9","bibliographicPageStart":"1","bibliographicVolumeNumber":"101","bibliographic_titles":[{"bibliographic_title":"東京大学農学部演習林報告"}]}]},"item_4_description_5":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"エゾマツ天然林ではヤツバキクイムシによる枯損が択伐後数年間にわたり発生する。択伐後4年間枯損が発生したところで，4年目の虫害枯損木から採取した円板について年輪解析を行い，枯損前の状態を成長経過から推測した。枯損木の平均樹齢は154年で，胸高直径と樹齢には相関は低かった。枯損木のうち61.5％のものは全成育期間を通じて被圧の経験が無く，虫害枯損と被圧とは無関係であると考えられた。択伐後2年間は年輪幅が小さく，生立木，枯損木とも3年目ごろには年輪幅の回復の兆しを示した。このことが枯損の終息と関係している可能性が考えられる。単木枯損と群状枯損を比較したところ，平均樹齢には差が無かった。しかし，群状枯損の個体間には樹齢や年輪幅成長量に差があった。単木では枯れにくい小・中径木も群状では虫害を受けたと考えられる。","subitem_description_type":"Abstract"},{"subitem_description":"The spruce bark beetle, Ips typographus japonicus, kills Yezo-spruce (Picea jezoensis CARR.) in the three or four years after selection cuttings in natural forests in Hokkaido. We felled 52 trees killed by the beetle in the fourth year after selection cuttings and measured the annual increment of stem diameter. The mean age was 154 when they were killed and there was no high correlation between the age and DBH. Most trees did not have a period of supression or had one only when they were young. The annual increment of stem diameter decreased for about two or three years and showed a tendency to recover in the third year after selection cuttings. This recovery may have some relationship with the end of the time when trees were being killed after selection cuttings. Some solitary trees were killed and others were killed in groups. There was no difference in the mean age between the trees killed in a solitary setting and those in groups, but there were differences in the age and the mean annual increment of stem diameter among the trees in a group.","subitem_description_type":"Abstract"}]},"item_4_full_name_3":{"attribute_name":"著者別名","attribute_value_mlt":[{"nameIdentifiers":[{"nameIdentifier":"54386","nameIdentifierScheme":"WEKO"}],"names":[{"name":"IGUCHI, Kazunobu"}]},{"nameIdentifiers":[{"nameIdentifier":"54387","nameIdentifierScheme":"WEKO"}],"names":[{"name":"YAMAMOTO, Hirokazu"}]},{"nameIdentifiers":[{"nameIdentifier":"54388","nameIdentifierScheme":"WEKO"}],"names":[{"name":"FURUTA, Kimito"}]}]},"item_4_publisher_20":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"東京大学大学院農学生命科学研究科附属演習林"}]},"item_4_source_id_10":{"attribute_name":"書誌レコードID","attribute_value_mlt":[{"subitem_source_identifier":"AN00162451","subitem_source_identifier_type":"NCID"}]},"item_4_source_id_8":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"03716007","subitem_source_identifier_type":"ISSN"}]},"item_4_subject_15":{"attribute_name":"日本十進分類法","attribute_value_mlt":[{"subitem_subject":"610","subitem_subject_scheme":"NDC"}]},"item_4_text_21":{"attribute_name":"出版者別名","attribute_value_mlt":[{"subitem_text_value":"The Tokyo University Forests"}]},"item_4_text_4":{"attribute_name":"著者所属","attribute_value_mlt":[{"subitem_text_value":"東京大学農学部附属演習林北海道演習林"},{"subitem_text_value":"東京大学農学部附属演習林研究部"},{"subitem_text_value":"東京大学大学院農学生命科学研究科森林科学専攻"},{"subitem_text_value":"University Forest in Hokkaido, Faculty of Agriculture, The University of Tokyo"},{"subitem_text_value":"Research Division of the University Forests, Faculty of Agriculture, The University of Tokyo"},{"subitem_text_value":"Department of Forest Science, Graduate School of Agricultural and Life Sciences, The University of Tokyo"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"井口, 和信"}],"nameIdentifiers":[{"nameIdentifier":"54383","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"山本, 博一"}],"nameIdentifiers":[{"nameIdentifier":"54384","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"古田, 公人"}],"nameIdentifiers":[{"nameIdentifier":"54385","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":"2017-06-09"}],"displaytype":"detail","filename":"esrh101001.pdf","filesize":[{"value":"632.5 kB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"esrh101001.pdf","url":"https://repository.dl.itc.u-tokyo.ac.jp/record/25379/files/esrh101001.pdf"},"version_id":"1fdcdc42-ad25-4ed5-b656-fd2fb49d4ef4"}]},"item_keyword":{"attribute_name":"キーワード","attribute_value_mlt":[{"subitem_subject":"北海道","subitem_subject_scheme":"Other"},{"subitem_subject":"エゾマツ","subitem_subject_scheme":"Other"},{"subitem_subject":"ヤツバキクイムシ","subitem_subject_scheme":"Other"},{"subitem_subject":"年輪解析","subitem_subject_scheme":"Other"},{"subitem_subject":"成長経過","subitem_subject_scheme":"Other"},{"subitem_subject":"Ips typographus japonicus","subitem_subject_scheme":"Other"},{"subitem_subject":"Picea jezoensis","subitem_subject_scheme":"Other"},{"subitem_subject":"selection cuttings","subitem_subject_scheme":"Other"},{"subitem_subject":"annual increment of stem diameter","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":"エゾマツ天然林の択伐にともなう虫害枯損木の樹齢と枯損前の成長","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"エゾマツ天然林の択伐にともなう虫害枯損木の樹齢と枯損前の成長"}]},"item_type_id":"4","owner":"1","path":["2540","2539"],"pubdate":{"attribute_name":"公開日","attribute_value":"2014-09-03"},"publish_date":"2014-09-03","publish_status":"0","recid":"25379","relation_version_is_last":true,"title":["エゾマツ天然林の択伐にともなう虫害枯損木の樹齢と枯損前の成長"],"weko_creator_id":"1","weko_shared_id":null},"updated":"2022-12-19T04:00:59.211375+00:00"}