{"_buckets": {"deposit": "bdf352ca-7b2b-49fe-8fa7-3a46a0cc758b"}, "_deposit": {"id": "2002630", "owners": [1], "pid": {"revision_id": 0, "type": "depid", "value": "2002630"}, "status": "published"}, "_oai": {"id": "oai:u-ryukyu.repo.nii.ac.jp:02002630", "sets": ["1642837922702", "1642838407312"]}, "author_link": [], "item_1617186331708": {"attribute_name": "Title", "attribute_value_mlt": [{"subitem_1551255647225": "イジュ人工林の樹冠直径及び相対幹距に基づく除間伐基準の検討", "subitem_1551255648112": "ja"}, {"subitem_1551255647225": "Studies on the standard of cleaning and thinning based on the crown diameter and the relative spacing for the Ijyu (Scima wallichii Korthals ssp. liukiuensis Bloemb.) plantation", "subitem_1551255648112": "en"}]}, "item_1617186419668": {"attribute_name": "Creator", "attribute_type": "creator", "attribute_value_mlt": [{"creatorNames": [{"creatorName": "安里, 練雄", "creatorNameLang": "ja"}]}, {"creatorNames": [{"creatorName": "当真, 寛子", "creatorNameLang": "ja"}]}, {"creatorNames": [{"creatorName": "呂, 勇", "creatorNameLang": "ja"}]}, {"creatorNames": [{"creatorName": "安里, 修", "creatorNameLang": "ja"}]}, {"creatorNames": [{"creatorName": "Asato, Isao", "creatorNameLang": "en"}]}, {"creatorNames": [{"creatorName": "Touma, Hiroko", "creatorNameLang": "en"}]}, {"creatorNames": [{"creatorName": "Lu, Yong", "creatorNameLang": "en"}]}, {"creatorNames": [{"creatorName": "Asato, Osamu", "creatorNameLang": "en"}]}]}, "item_1617186476635": {"attribute_name": "Access Rights", "attribute_value_mlt": [{"subitem_1522299639480": "open access", "subitem_1600958577026": "http://purl.org/coar/access_right/c_abf2"}]}, "item_1617186609386": {"attribute_name": "Subject", "attribute_value_mlt": [{"subitem_1522299896455": "ja", "subitem_1522300014469": "Other", "subitem_1523261968819": "イジュ"}, {"subitem_1522299896455": "ja", "subitem_1522300014469": "Other", "subitem_1523261968819": "樹冠直径"}, {"subitem_1522299896455": "ja", "subitem_1522300014469": "Other", "subitem_1523261968819": "相対幹距"}, {"subitem_1522299896455": "ja", "subitem_1522300014469": "Other", "subitem_1523261968819": "除間伐"}, {"subitem_1522299896455": "ja", "subitem_1522300014469": "Other", "subitem_1523261968819": "森林施業基準"}, {"subitem_1522299896455": "en", "subitem_1522300014469": "Other", "subitem_1523261968819": "Scima wallichii Korthals ssp"}, {"subitem_1522299896455": "en", "subitem_1522300014469": "Other", "subitem_1523261968819": "liukiuensis Bloemb"}, {"subitem_1522299896455": "en", "subitem_1522300014469": "Other", "subitem_1523261968819": "crown diameter"}, {"subitem_1522299896455": "en", "subitem_1522300014469": "Other", "subitem_1523261968819": "relative spacing"}, {"subitem_1522299896455": "en", "subitem_1522300014469": "Other", "subitem_1523261968819": "cleaning and thinning"}, {"subitem_1522299896455": "en", "subitem_1522300014469": "Other", "subitem_1523261968819": "standard of forest operation"}]}, "item_1617186626617": {"attribute_name": "Description", "attribute_value_mlt": [{"subitem_description": "イジュは沖縄県においては重要な造林樹種の一つである。造林地の健全な育成を図るためには、除間伐を促進する必要があるが,そのための施業基準は示されていない。樹冠直径及び相対幹距に基づいて,除間伐の本数管理基準を検討した。胸高直径,樹冠直径,樹高等の相互関係を明らかにし,樹冠閉鎖度と相対幹距に応じた立木本数を推定した。除間伐を試験的に行い,その結果と推定立木本数とを比較して適正本数を検討した。イジュ人工林は、平均胸高直径が10cmに達する前,III齢級に最初の除間伐が必要である。除間伐の基準は,施業によって平均胸高直径8cm,平均樹高9mで,ha当たり立木本数3,000本に調整することにある。これらの結果は,相対幹距15%程度での本数管理が適当であることを示している。", "subitem_description_type": "Other"}, {"subitem_description": "Ijyu (Scima wallichii Korthals ssp. liukiuensis Bloemb.) is one of the important reforestation tree species in Okinawa district. Cleaning and thinning have to be promoted for the healthy growing of the Ijyu plantation. However, the standard of cleaning and thinning have not been prepared yet. The standard of number of standing trees for cleaning and thinning was studied based on the crown diameter and the relative spacing. For Ijyu plantation, the first cleaning and thinning are necessary at age classIII, before the mean d. b. h. reaches 10 cm. Then, the standard of operation is to regulate mean d. b. h. of 8cm, mean t. h. of 9m, number of standing trees per ha. of 3,000. It suggests that the suitable number of standing trees for management is about 15 % of the relative spacing.", "subitem_description_type": "Other"}, {"subitem_description": "紀要論文", "subitem_description_type": "Other"}]}, "item_1617186643794": {"attribute_name": "Publisher", "attribute_value_mlt": [{"subitem_1522300295150": "ja", "subitem_1522300316516": "琉球大学農学部"}]}, "item_1617186702042": {"attribute_name": "Language", "attribute_value_mlt": [{"subitem_1551255818386": "jpn"}]}, "item_1617186783814": {"attribute_name": "Identifier", "attribute_value_mlt": [{"subitem_identifier_type": "HDL", "subitem_identifier_uri": "http://hdl.handle.net/20.500.12000/3597"}]}, "item_1617186920753": {"attribute_name": "Source Identifier", "attribute_value_mlt": [{"subitem_1522646500366": "ISSN", "subitem_1522646572813": "0370-4246"}, {"subitem_1522646500366": "NCID", "subitem_1522646572813": "AN00250548"}]}, "item_1617186941041": {"attribute_name": "Source Title", "attribute_value_mlt": [{"subitem_1522650068558": "ja", "subitem_1522650091861": "琉球大学農学部学術報告"}, {"subitem_1522650068558": "en", "subitem_1522650091861": "The Science Bulletin of the Faculty of Agriculture. University of the Ryukyus"}]}, "item_1617187056579": {"attribute_name": "Bibliographic Information", "attribute_value_mlt": [{"bibliographicIssueNumber": "50", "bibliographicPageEnd": "75", "bibliographicPageStart": "71"}]}, "item_1617258105262": {"attribute_name": "Resource Type", "attribute_value_mlt": [{"resourcetype": "departmental bulletin paper", "resourceuri": "http://purl.org/coar/resource_type/c_6501"}]}, "item_1617265215918": {"attribute_name": "Version Type", "attribute_value_mlt": [{"subitem_1522305645492": "VoR", "subitem_1600292170262": "http://purl.org/coar/version/c_970fb48d4fbd8a85"}]}, "item_1617605131499": {"attribute_name": "File", "attribute_type": "file", "attribute_value_mlt": [{"accessrole": "open_access", "download_preview_message": "", "file_order": 0, "filename": "KJ00004258135.pdf", "future_date_message": "", "is_thumbnail": false, "mimetype": "", "size": 0, "url": {"objectType": "fulltext", "url": "https://u-ryukyu.repo.nii.ac.jp/record/2002630/files/KJ00004258135.pdf"}, "version_id": "ac541a34-c1bb-4c6e-b032-7ded6dfe14bf"}]}, "item_title": "イジュ人工林の樹冠直径及び相対幹距に基づく除間伐基準の検討", "item_type_id": "15", "owner": "1", "path": ["1642837922702", "1642838407312"], "permalink_uri": "http://hdl.handle.net/20.500.12000/3597", "pubdate": {"attribute_name": "PubDate", "attribute_value": "2008-02-14"}, "publish_date": "2008-02-14", "publish_status": "0", "recid": "2002630", "relation": {}, "relation_version_is_last": true, "title": ["イジュ人工林の樹冠直径及び相対幹距に基づく除間伐基準の検討"], "weko_shared_id": -1}