{"@context":{"@vocab":"https://cir.nii.ac.jp/schema/1.0/","rdfs":"http://www.w3.org/2000/01/rdf-schema#","dc":"http://purl.org/dc/elements/1.1/","dcterms":"http://purl.org/dc/terms/","foaf":"http://xmlns.com/foaf/0.1/","prism":"http://prismstandard.org/namespaces/basic/2.0/","cinii":"http://ci.nii.ac.jp/ns/1.0/","datacite":"https://schema.datacite.org/meta/kernel-4/","ndl":"http://ndl.go.jp/dcndl/terms/","jpcoar":"https://github.com/JPCOAR/schema/blob/master/2.0/"},"@id":"https://cir.nii.ac.jp/crid/1050845763597194624.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"URI","@value":"https://agriknowledge.affrc.go.jp/RN/2010642393"}},{"identifier":{"@type":"NDL_BIB_ID","@value":"6278300"}},{"identifier":{"@type":"URI","@value":"http://id.ndl.go.jp/bib/6278300"}},{"identifier":{"@type":"URI","@value":"https://ndlsearch.ndl.go.jp/books/R000000004-I6278300"}},{"identifier":{"@type":"URI","@value":"https://dl.ndl.go.jp/pid/8814101"}},{"identifier":{"@type":"NAID","@value":"40005516985"}}],"resourceType":"学術雑誌論文(journal article)","dc:title":[{"@language":"ja","@value":"ウダイカンバ二次林での間伐効果と樹冠衰退"},{"@language":"ja-Kana","@value":"ウダイカンバ 2ジリン デ ノ カンバツ コウカ ト ジュカン スイタイ"}],"dc:language":"ja","description":[{"type":"Abstract","notation":[{"@language":"ja","@value":"林齢約70年生の山火再生林由来のウダイカンバ二次林に対して実施した間伐の15年後における効果と、樹冠衰退木の発生状況について調査した。間伐試験は、材積間伐率で、弱度間伐(10.2%)、中度間伐(25.5%)、強度間伐(46.8%)の3段階の強度で実施した。　林分純成長量は、間伐前(1971～1983年)に比べて、間伐後(1985～1999年)の方が小さがった。枯損量は間伐前後でそれほど変わらず、粗成長量が小さくなった。間伐後の直径成長量は強度間伐区で最も大きかったが、年平均成長量は0.14cmと小さかった。枯死木の発生数が間伐により減少したにもかかわらず、枯損量が間伐前後で変わらないのは、間伐後に平均直径以上の個体の枯死が増えたためだと考えられた。　これらのことから、林齢約70年生のウダイカンパ二次林へ対する間伐効果は小さいと考えられた。　本林分では、1999年の調査時にウダイカンパの枝が梢端部から枯れてゆく樹冠部の衰退が観察された。樹冠衰退木は、全体の8割を占めた。樹冠衰退木の発生頻度は、間伐強度と無関係であった。樹冠衰退木の直径成長量の低下は、間伐年以前より現れており、1985～1999年の間に明瞭になった。樹冠衰退の発生原因は明らかではないが、現時点で樹冠の衰退が顕在化している個体は、症状が現れる以前より成長量が低下していることから、樹冠の衰退を引き起こすような条件（病虫害、気象害など）により、成長量の小さい個体から衰退が発現したものと推測される。"}]}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1410001205707152641","@type":"Researcher","personIdentifier":[{"@type":"NRID","@value":"9000006801971"},{"@type":"NRID","@value":"9000264264443"},{"@type":"NRID","@value":"9000380491889"},{"@type":"NRID","@value":"9000411840863"},{"@type":"NRID","@value":"9000408659248"},{"@type":"NRID","@value":"9000396090168"},{"@type":"NRID","@value":"9000396090247"},{"@type":"NRID","@value":"9000410755432"},{"@type":"NRID","@value":"9000015308583"},{"@type":"NRID","@value":"9000413892804"},{"@type":"NRID","@value":"9000377375616"},{"@type":"RESEARCHMAP","@value":"https://researchmap.jp/read0160508"}],"foaf:name":[{"@language":"ja","@value":"渡辺, 一郎"}],"role":"著"},{"@id":"https://cir.nii.ac.jp/crid/1030285133620525956","@type":"Researcher","personIdentifier":[{"@type":"KAKEN_RESEARCHERS","@value":"30414262"},{"@type":"NRID","@value":"1000030414262"},{"@type":"NRID","@value":"9000283885323"},{"@type":"NRID","@value":"9000018313014"},{"@type":"NRID","@value":"9000258479732"},{"@type":"NRID","@value":"9000258492463"},{"@type":"NRID","@value":"9000405659609"},{"@type":"NRID","@value":"9000283888395"},{"@type":"NRID","@value":"9000258492146"},{"@type":"NRID","@value":"9000406393469"},{"@type":"NRID","@value":"9000348558258"},{"@type":"NRID","@value":"9000253298965"},{"@type":"NRID","@value":"9000396089922"},{"@type":"NRID","@value":"9000392779221"},{"@type":"NRID","@value":"9000259827880"},{"@type":"NRID","@value":"9000392051302"},{"@type":"NRID","@value":"9000392051263"},{"@type":"NRID","@value":"9000409763891"},{"@type":"NRID","@value":"9000258487563"},{"@type":"NRID","@value":"9000406033246"},{"@type":"NRID","@value":"9000406033240"},{"@type":"NRID","@value":"9000392055147"},{"@type":"NRID","@value":"9000392029082"},{"@type":"NRID","@value":"9000002108298"},{"@type":"NRID","@value":"9000414066628"},{"@type":"NRID","@value":"9000406040746"},{"@type":"NRID","@value":"9000258488386"},{"@type":"NRID","@value":"9000019085281"},{"@type":"NRID","@value":"9000347222975"},{"@type":"NRID","@value":"9000347159751"},{"@type":"NRID","@value":"9000347158626"},{"@type":"NRID","@value":"9000392052895"},{"@type":"NRID","@value":"9000258477760"},{"@type":"NRID","@value":"9000293504848"},{"@type":"NRID","@value":"9000009149032"},{"@type":"NRID","@value":"9000283888098"},{"@type":"NRID","@value":"9000329019616"},{"@type":"NRID","@value":"9000392049388"},{"@type":"NRID","@value":"9000392051298"},{"@type":"NRID","@value":"9000283888463"},{"@type":"NRID","@value":"9000347159578"},{"@type":"NRID","@value":"9000347159761"},{"@type":"NRID","@value":"9000329019631"},{"@type":"NRID","@value":"9000392022642"},{"@type":"NRID","@value":"9000258477947"},{"@type":"NRID","@value":"9000258478746"},{"@type":"NRID","@value":"9000000493213"},{"@type":"NRID","@value":"9000347222738"},{"@type":"NRID","@value":"9000392051946"},{"@type":"NRID","@value":"9000006616046"},{"@type":"NRID","@value":"9000409590996"},{"@type":"NRID","@value":"9000409591008"},{"@type":"NRID","@value":"9000347223085"},{"@type":"NRID","@value":"9000396090533"},{"@type":"NRID","@value":"9000258478773"},{"@type":"RESEARCHMAP","@value":"https://researchmap.jp/read0002276"}],"foaf:name":[{"@language":"ja","@value":"寺澤, 和彦"}],"role":"著"},{"@id":"https://cir.nii.ac.jp/crid/1410001206358451970","@type":"Researcher","personIdentifier":[{"@type":"NRID","@value":"9000004449376"}],"foaf:name":[{"@language":"ja","@value":"八坂, 通泰"}],"role":"著"},{"@id":"https://cir.nii.ac.jp/crid/1420282801209431808","@type":"Researcher","personIdentifier":[{"@type":"KAKEN_RESEARCHERS","@value":"50376365"},{"@type":"NRID","@value":"1000050376365"},{"@type":"NRID","@value":"9000003184156"},{"@type":"NRID","@value":"9000391901297"},{"@type":"NRID","@value":"9000329018966"},{"@type":"NRID","@value":"9000392052716"},{"@type":"NRID","@value":"9000410972262"},{"@type":"NRID","@value":"9000258483631"},{"@type":"NRID","@value":"9000258485625"},{"@type":"NRID","@value":"9000258306968"},{"@type":"NRID","@value":"9000000894350"},{"@type":"NRID","@value":"9000347668084"},{"@type":"NRID","@value":"9000283882644"},{"@type":"NRID","@value":"9000305640445"},{"@type":"NRID","@value":"9000392053166"},{"@type":"NRID","@value":"9000402465130"},{"@type":"NRID","@value":"9000009995919"},{"@type":"NRID","@value":"9000251013904"},{"@type":"NRID","@value":"9000283887827"},{"@type":"NRID","@value":"9000402464932"},{"@type":"NRID","@value":"9000392024328"},{"@type":"NRID","@value":"9000258489075"},{"@type":"NRID","@value":"9000258492464"},{"@type":"NRID","@value":"9000258306973"},{"@type":"NRID","@value":"9000391904891"},{"@type":"NRID","@value":"9000258480259"},{"@type":"NRID","@value":"9000405303675"},{"@type":"NRID","@value":"9000002108293"},{"@type":"NRID","@value":"9000258493050"},{"@type":"NRID","@value":"9000001126124"},{"@type":"NRID","@value":"9000283885935"},{"@type":"NRID","@value":"9000347077044"},{"@type":"NRID","@value":"9000392032359"},{"@type":"NRID","@value":"9000258308023"},{"@type":"NRID","@value":"9000392035719"},{"@type":"NRID","@value":"9000392030836"},{"@type":"NRID","@value":"9000410972265"},{"@type":"NRID","@value":"9000258483028"},{"@type":"NRID","@value":"9000258487770"},{"@type":"NRID","@value":"9000392049025"},{"@type":"NRID","@value":"9000409762527"},{"@type":"NRID","@value":"9000409762397"},{"@type":"NRID","@value":"9000391902911"},{"@type":"NRID","@value":"9000391893108"},{"@type":"NRID","@value":"9000391904742"},{"@type":"NRID","@value":"9000283883862"},{"@type":"NRID","@value":"9000396088073"},{"@type":"NRID","@value":"9000412424739"},{"@type":"NRID","@value":"9000403581769"},{"@type":"NRID","@value":"9000329017590"},{"@type":"NRID","@value":"9000392053310"},{"@type":"NRID","@value":"9000409761461"},{"@type":"NRID","@value":"9000258486191"},{"@type":"NRID","@value":"9000392051202"},{"@type":"NRID","@value":"9000396089140"},{"@type":"NRID","@value":"9000402464922"},{"@type":"NRID","@value":"9000398453095"},{"@type":"NRID","@value":"9000396088347"},{"@type":"NRID","@value":"9000402465717"},{"@type":"NRID","@value":"9000283885144"},{"@type":"NRID","@value":"9000409762385"},{"@type":"NRID","@value":"9000391899960"},{"@type":"NRID","@value":"9000283889374"},{"@type":"NRID","@value":"9000326660752"},{"@type":"NRID","@value":"9000402465232"},{"@type":"NRID","@value":"9000392022639"},{"@type":"NRID","@value":"9000258308029"},{"@type":"NRID","@value":"9000345207945"},{"@type":"NRID","@value":"9000347158195"},{"@type":"NRID","@value":"9000396089849"},{"@type":"NRID","@value":"9000258482772"},{"@type":"NRID","@value":"9000258483307"},{"@type":"NRID","@value":"9000258308017"},{"@type":"NRID","@value":"9000000517626"},{"@type":"NRID","@value":"9000391900055"},{"@type":"NRID","@value":"9000396089161"},{"@type":"NRID","@value":"9000402463840"},{"@type":"NRID","@value":"9000392033199"},{"@type":"NRID","@value":"9000409761478"},{"@type":"NRID","@value":"9000263043042"},{"@type":"RESEARCHMAP","@value":"https://researchmap.jp/kiyoshiumeki"}],"foaf:name":[{"@language":"ja","@value":"梅木, 清"}],"role":"著"}],"publication":{"publicationIdentifier":[{"@type":"NDL_BIB_ID","@value":"000000042457"},{"@type":"ISSN","@value":"09103945"},{"@type":"LISSN","@value":"09103945"},{"@type":"NCID","@value":"AN1005962X"}],"prism:publicationName":[{"@language":"ja","@value":"北海道林業試験場研究報告"}],"dc:publisher":[{"@value":"北海道立林業試験場"}],"prism:publicationDate":"2002-03","prism:number":"39","prism:startingPage":"55","prism:endingPage":"68"},"url":[{"@id":"https://agriknowledge.affrc.go.jp/RN/2010642393"},{"@id":"http://id.ndl.go.jp/bib/6278300"},{"@id":"https://ndlsearch.ndl.go.jp/books/R000000004-I6278300"},{"@id":"https://dl.ndl.go.jp/pid/8814101"}],"createdAt":"2011-03-05","foaf:topic":[{"@id":"https://cir.nii.ac.jp/all?q=%E3%82%A6%E3%83%80%E3%82%A4%E3%82%AB%E3%83%B3%E3%83%90","dc:title":"ウダイカンバ"},{"@id":"https://cir.nii.ac.jp/all?q=%E4%BA%8C%E6%AC%A1%E6%9E%97","dc:title":"二次林"},{"@id":"https://cir.nii.ac.jp/all?q=%E5%B1%B1%E7%81%AB%E5%86%8D%E7%94%9F%E6%9E%97","dc:title":"山火再生林"},{"@id":"https://cir.nii.ac.jp/all?q=%E9%96%93%E4%BC%90%E5%8A%B9%E6%9E%9C","dc:title":"間伐効果"},{"@id":"https://cir.nii.ac.jp/all?q=%E6%A8%B9%E5%86%A0%E8%A1%B0%E9%80%80","dc:title":"樹冠衰退"},{"@id":"https://cir.nii.ac.jp/all?q=%E6%9E%97%E5%88%86%E6%88%90%E9%95%B7%E9%87%8F","dc:title":"林分成長量"},{"@id":"https://cir.nii.ac.jp/all?q=Betula%20maximowicziana","dc:title":"Betula maximowicziana"},{"@id":"https://cir.nii.ac.jp/all?q=secondary%20forest%20after%20fire","dc:title":"secondary forest after fire"},{"@id":"https://cir.nii.ac.jp/all?q=thinning%20effect","dc:title":"thinning effect"},{"@id":"https://cir.nii.ac.jp/all?q=crown%20dieback","dc:title":"crown dieback"},{"@id":"https://cir.nii.ac.jp/all?q=stand%20growth","dc:title":"stand growth"}],"dataSourceIdentifier":[{"@type":"IRDB","@value":"oai:irdb.nii.ac.jp:03420:0004214873"},{"@type":"NDL_SEARCH","@value":"oai:ndlsearch.ndl.go.jp:R000000004-I6278300"},{"@type":"CIA","@value":"40005516985"}]}