{"created":"2022-01-27T07:26:50.854607+00:00","id":2003193,"links":{},"metadata":{"_buckets":{"deposit":"aa4b2479-5618-4279-a571-07d773671158"},"_deposit":{"id":"2003193","owners":[1],"pid":{"revision_id":0,"type":"depid","value":"2003193"},"status":"published"},"_oai":{"id":"oai:u-ryukyu.repo.nii.ac.jp:02003193","sets":["1642837622505:1642837905044:1642837911830","1642838403551:1642838407312"]},"author_link":[],"item_1617186331708":{"attribute_name":"Title","attribute_value_mlt":[{"subitem_1551255647225":"エゴノキの施業について (II)(林学科)","subitem_1551255648112":"ja"},{"subitem_1551255647225":"Studies on the managements of Egonoki (Styrax Japonica S. & Z.) forest (II) (Department of Forestry)","subitem_1551255648112":"en"}]},"item_1617186419668":{"attribute_name":"Creator","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"砂川, 季昭","creatorNameLang":"ja"}]},{"creatorNames":[{"creatorName":"田場, 和雄","creatorNameLang":"ja"}]},{"creatorNames":[{"creatorName":"平田, 永二","creatorNameLang":"ja"}]},{"creatorNames":[{"creatorName":"Sunakawa, Seaki","creatorNameLang":"en"}]},{"creatorNames":[{"creatorName":"Taba, Kazuo","creatorNameLang":"en"}]},{"creatorNames":[{"creatorName":"Hirata, Eiji","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_1617186626617":{"attribute_name":"Description","attribute_value_mlt":[{"subitem_description":"本報では, 各種の施業法について検討するため, 新たに, 試験地を10×10mのプロットに区画しなおし, 皆伐区, 択伐区, 対象区の3つの試験区を設け, 再調査を行うと同時に皆伐区を仕立本数によって40本区, 60本区, 80本区, 100本区の4つの区に区分し, 除伐を実行して本数の整理を行った。これらの結果を要約すれば次の通りである。1)プロット当りの立木本数は77∿241本と, プロットによってかなり差があるが, 相対幹距は6.4∿11.2%で, 全体的に密の状態である。2)本数での除伐率は, 40本区が48%, 60本区が41%, 80本区が58%, 100本区が53%であった。3)平均直径は3.9∿6.5cmの範囲で立木本数とほぼ逆比例の関係を示し, 平均樹高はプロット1と7以外のプロットでは6.0∿6.7mと近似した値を示した。また, 除伐に伴う平均直径及び平均樹高の増加量は, エゴノキの除伐本数の多い区ほど大きくなっている。4)直径分布は, プロット7がやや正規型の分布を示すのに対し, その他のプロットでは2∿4cm階に極大値をもち, 直径の大きな方向へ広がる非対称型の分布を示した。また, いずれのプロットにおいても直径分布に対してはワイブル分布式がよく適合した。5)ha当り材積は115∿176m^3で平均は146m^3である。また, ha当り平均生長量の平均は, エゴノキ以外の樹種(本数にして約7%)も含めて13.3m^3であった。6)材積での除伐率は, 40本区で34%, 60本区32%, 80本区35%, 100本区20%であった。","subitem_description_type":"Other"},{"subitem_description":"The experimental area was divided into the eight 10m×10m plots, which included 4 plots of the clear cutting, 2 plots of the selective cutting, and 2 plots of the control, in order to determine the appropriate management technics for the forest of Egonoki, Styrax Japonica S. & Z., in Okinawa. In this investigation, for the standing trees, the diameter at breast height and the tree height were surveyed. The diameter at breast height was measured at the 1cm step with a diameter tape, and the tree height at 0.5m step with a pole. And prior to establish the clear cutting plots, the salvage cutting was done to leave 40,60,80 and 100 trees per plot in November 1978. The results of the work were as folloews; 1) The numbers of trees per plot ranged from 77 to 241 in number, namely, it was recognized to be different among the plot. 2) The diameter distributions in the respective plots were mostly shown by a unsymmetrical curve, and could be expressed to fit measured values by the Weibull distribution equation. 3) The volume per hectare in individual plots ranged from 115 to 176m^3,and the mean was 146 ^3. The mean of the average increment was 13.3m^3 per hectare. 4) The cutting percentages in tree number were 48% in the 40 trees reserved plot, 41% in the 60 trees reserved plot, 58% in the 80 trees reserved plot and 53% in the 100 trees reserved plot, and the cutting volumes were 34%, 32%, 35%, 20%, respectively.","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/20.500.12000/4179"}]},"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":[{"bibliographicIssueDates":{"bibliographicIssueDate":"1979-12-11","bibliographicIssueDateType":"Issued"},"bibliographicIssueNumber":"26","bibliographicPageEnd":"572","bibliographicPageStart":"561"}]},"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","filename":"KJ00000162029.pdf","mimetype":"application/pdf","url":{"objectType":"fulltext","url":"https://u-ryukyu.repo.nii.ac.jp/record/2003193/files/KJ00000162029.pdf"},"version_id":"687e2ce3-1cca-44d2-9cbb-01178cbfb25e"}]},"item_title":"エゴノキの施業について (II)(林学科)","item_type_id":"15","owner":"1","path":["1642837911830","1642838407312"],"pubdate":{"attribute_name":"PubDate","attribute_value":"2008-02-14"},"publish_date":"2008-02-14","publish_status":"0","recid":"2003193","relation_version_is_last":true,"title":["エゴノキの施業について (II)(林学科)"],"weko_creator_id":"1","weko_shared_id":-1},"updated":"2022-10-31T01:17:21.917336+00:00"}