{"created":"2022-01-27T02:41:36.978867+00:00","id":2002879,"links":{},"metadata":{"_buckets":{"deposit":"8ddb49ec-4592-4eee-8fcb-b88c20e58666"},"_deposit":{"id":"2002879","owners":[1],"pid":{"revision_id":0,"type":"depid","value":"2002879"},"status":"published"},"_oai":{"id":"oai:u-ryukyu.repo.nii.ac.jp:02002879","sets":["1642837622505:1642837905044:1642837917528","1642838403551:1642838407312"]},"author_link":[],"item_1617186331708":{"attribute_name":"Title","attribute_value_mlt":[{"subitem_1551255647225":"飼料資源としての有用木本植物の検索とその飼料化に関する基礎的研究 : 第 2 報 アカメガシワ (Mallotus japonicus Muell-Arg) の生産に及ぼす窒素肥料の施用効果(附属熱帯農学研究施設)","subitem_1551255648112":"ja"},{"subitem_1551255647225":"Utilization of Toropical and Sub-Toropical Woody Plants as Feeding Resources of Animals : 2. Effect of nitrogen fertilization on the production of Akamegasiwa (Mallotus japonicus Muell-Arg) (Reseach Instifute of Tropical Agriculture)","subitem_1551255648112":"en"}]},"item_1617186419668":{"attribute_name":"Creator","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"新城, 健","creatorNameLang":"ja"}]},{"creatorNames":[{"creatorName":"星野, 正生","creatorNameLang":"ja"}]},{"creatorNames":[{"creatorName":"Shinjo, Takesi","creatorNameLang":"en"}]},{"creatorNames":[{"creatorName":"Hoshino, Masao","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":"南西諸島においては,野生のアカメガシワの樹葉は家畜の飼料供給源として,これまで慣行的に利用されてきた。しかしながらそれは,現存量を利用する形態であるため種々の問題を有している。そこで本試験ではアカメガシワの有効な活用を目的に窒素肥料の施用試験を実施した。アカメガシワは施肥することにより潜在的な生産能力を大きく発揮し,乾物生産量,蛋白質収量の増加,また蛋白質含有量の上昇と,質的,量的な生産力の向上を図ることが可能であることが明らかになった。将来の飼料資源の素材のひとつとして検討する価値があるものと考えられる。結果の大要は以下の通りである。1. 乾物収量 アカメガシワは施肥窒素に対し強い反応を示し,窒素の供給量に応じて乾物収量は著しく増大する傾向を示した。2. 刈り取り回数 1989年10月～90年9月の間に4回の刈り取りを行ったが,アカメガシワを幼植物より養成し,生長点数の多い再生に有利な形に仕立てた場合には刈り取り毎の収量は多回刈にもかかわらず増大傾向を示し,正常な再生状態であった。3. 葉量割合 アカメガシワの収量は葉が枝よりも高くなり飼料資源として有利な結果を示したが,葉量割合(葉/総量)は窒素増施と生育経過の影響が強く現れ,窒素供給量の増加と刈り取りを重ねる毎にその割合は次第に低下した。4. 窒素含有量 アカメガシワの窒素含有率は窒素水準間の差がほとんどなく近似した数値を示した。刈り取り期毎の窒素含有率は季節的には9月と10月の秋期に若干高まる傾向が認められた。葉と枝の窒素含有率はいずれの処理間でも葉は枝に比べて常に2～3倍以上高く,明らかな差が認められた。5. 葉面積 各窒素水準間の乾物1g当りの葉面積は大きな変化を示さなかったが,アカメガシワの1本当りの葉面積と葉面積指数は窒素施用量の影響が強く現れ,窒素供給量に応じて著しく大きくなった。6. 粗蛋白質収量 各窒素水準間のアカメガシワの窒素含有率は大差がなかったが,窒素増施が乾物収量の増大をもたらした結果,各窒素水準間の粗蛋白質収量は著しく拡大した。","subitem_description_type":"Other"},{"subitem_description":"The purpose of the present study was to improve the animal agroforestry which enhance livestock production in the tropical and sub-tropical countries. Akamegasiwa (Mallotus japonicus Muell-Arg.) is a rapid growing tree species, belongs to Euphorbiaceae, widely distributed from temperate to sub-tropical and tropical regions. In Ryukyu Islands, Akamegasiwa is common and a ready invader as secondary forest species after opening of original forest vegetations. The plant has been used as feeding stuff of animal such as goats and cattle by small scale farmers. This paper presents the results of experiment to study the effect of nitrogen application on the dry matter yield and crude protein yield in the Akamegasiwa. Plants were grown in pots and transplanted under field condition, grown in the same way as mulberry cultivation. The results of this study indicate that it is clear that the application of nitrogen fertilizer showed marked increase of dry matter yield, and yield increased with increase of application. When Akamegasiwa was grown same as mulberry trees, the regrowth after harvesting was vigorous and tolerable to frequent cuttings namely 4 times in a year. Though percentage of nitrogen in the leaves among the plots of different nitrogen application showed comparatively little difference, nitrogen contents tended to increase with increase of application rate. Leaves contains always 2-3 times of nitrogen than shoot. In the ratio of leaf to shoot, the higher the nitrogen application, the lower the leaf ratio. There was marked increase of leaf area per plant with increase of nitrogen application, almost proportionally. The nitrogen application increases leaf area rather than nitrogen content, hence there was shown significant increase of dry matter and crude protein yield.","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/20.500.12000/3850"}]},"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":"1991-12-04","bibliographicIssueDateType":"Issued"},"bibliographicIssueNumber":"38","bibliographicPageEnd":"303","bibliographicPageStart":"297"}]},"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":"KJ00000161680.pdf","mimetype":"application/pdf","url":{"objectType":"fulltext","url":"https://u-ryukyu.repo.nii.ac.jp/record/2002879/files/KJ00000161680.pdf"},"version_id":"d1548ed0-a4c1-4e93-9e29-37ac4fac3a0f"}]},"item_title":"飼料資源としての有用木本植物の検索とその飼料化に関する基礎的研究 : 第 2 報 アカメガシワ (Mallotus japonicus Muell-Arg) の生産に及ぼす窒素肥料の施用効果(附属熱帯農学研究施設)","item_type_id":"15","owner":"1","path":["1642837917528","1642838407312"],"pubdate":{"attribute_name":"PubDate","attribute_value":"2008-02-14"},"publish_date":"2008-02-14","publish_status":"0","recid":"2002879","relation_version_is_last":true,"title":["飼料資源としての有用木本植物の検索とその飼料化に関する基礎的研究 : 第 2 報 アカメガシワ (Mallotus japonicus Muell-Arg) の生産に及ぼす窒素肥料の施用効果(附属熱帯農学研究施設)"],"weko_creator_id":"1","weko_shared_id":-1},"updated":"2022-10-31T01:10:50.352919+00:00"}