{"created":"2022-01-27T02:43:06.217777+00:00","id":2002927,"links":{},"metadata":{"_buckets":{"deposit":"e8ee7487-b527-41aa-96b6-be08356e62b6"},"_deposit":{"id":"2002927","owners":[1],"pid":{"revision_id":0,"type":"depid","value":"2002927"},"status":"published"},"_oai":{"id":"oai:u-ryukyu.repo.nii.ac.jp:02002927","sets":["1642837622505:1642837905044:1642837915948","1642838403551:1642838407312"]},"author_link":[],"item_1617186331708":{"attribute_name":"Title","attribute_value_mlt":[{"subitem_1551255647225":"琉球列島のサトウキビ畑における雑草の生理・生態 : 第 11 報 土壌水分がツノアイアシとテリミノイヌホウズキの生育と種子生産に及ぼす影響(農学部附属農場)","subitem_1551255648112":"ja"},{"subitem_1551255647225":"Physiological and Ecological Characteristics of Weeds of Sugarcane Fields in the Ryukyu Islands : 11. Effects of Soil Moisture on the Growth and Seed Production of Rottboellia exaltata L. f. and Solanum alatum Moench (Agricultural Experiment Station)","subitem_1551255648112":"en"}]},"item_1617186419668":{"attribute_name":"Creator","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"仲間, 操","creatorNameLang":"ja"}]},{"creatorNames":[{"creatorName":"石嶺, 行男","creatorNameLang":"ja"}]},{"creatorNames":[{"creatorName":"村山, 盛一","creatorNameLang":"ja"}]},{"creatorNames":[{"creatorName":"Nakama, Misao","creatorNameLang":"en"}]},{"creatorNames":[{"creatorName":"Ishimine, Yukio","creatorNameLang":"en"}]},{"creatorNames":[{"creatorName":"Murayama, Seiichi","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":"サトウキビ畑の一年生雑草のうち発生量の最も多いツノアイアシとテリミノイヌホウズキの土壤水分の変化に対する反応を調査し, その結果を比較検討した。両草種とも概ね高土壤水分条件下で生育が旺盛となり, 形質によって多少の相違はあるものの耐湿性に優れていることが明らかになった。1.ツノアイアシの草丈とテリミノイヌホウズキの主茎長は土壤水分の増加とともにいずれも増加する傾向を示し, 処理後期においてpF2.0でそれぞれ最高値をとった。両形質の最適土壤水分域はpF2.0∿2.5と判断された。土壤水分pF3.5では著しい減少が認められ, 過乾条件下では大きく抑制されることが推察された(Fig.1)。2.ツノアイアシの個体当り分げつ数とテリミノイヌホウズキの個体当り分枝数も高土壤水分条件下で増加したが, 分げつ数が飽和, すなわち過湿条件下で著しく減少したのに対し, 分枝数は逆に過乾条件のpF3.5で著しい減少を示し, 土壤水分に対する反応が両形質間で異なることが認められた。最高値は草丈, 主茎長の場合と同様に処理後期においてpF2.0で示されており, pF2.0∿2.5が最適土壤水分域と推定された(Fig.2)。3.葉面積もツノアイアシ, テリミノイヌホウズキともに処理後期においてpF2.0で最大となったが, 葉面積が最も強く抑制されたのはツノアイアシでは過湿条件(飽和)下であり, テリミノイヌホウズキでは過乾条件(pF3.5)下であったことから土壤水分に対する両草種の反応が必ずしも同じでないことが推察された。なおテリミノイヌホウズキでは同じ処理後期に葉面積に急激な減少が認められたが, これは同時期に大量の落葉が生じたことが原因と思われる(Fig.3)。4.T/R率は両草種とも低水分で減少した。すなわち土壤水分の減少とともに地下部(根)の割合が増加することが認められた(Table1)。5.全乾物重はツノアイアシ, テリミノイヌホウズキのいずれにおいても高土壤水分条件下で増大したが, ツノアイアシでは過乾条件下で種子の生産がほとんどみられず, テリミノイヌホウズキでは果実の形成が全くみられなかったことが注目された。この結果から過乾条件下では両草種が次代への再生産を確保できないことが推定された(Fig.4)。6.出穂と開花は飽和条件または過湿条件で最も長く遅延した。種子生産形質すなわち個体当り穂数, 種子重, 穂長, 個体当り果実数, 果重は高水分ほど増加し, pF2.0で最大となりpF3.5では最少となった(Table2)。","subitem_description_type":"Other"},{"subitem_description":"Seeds of two important sugarcane field weed species, Rottboellia exaltata L. f. and Solanum alatum Moench. were sown and grown in Wagner pots of 1/5000a under different soil moisture intensities, namely, pF2.0,2.5,3.0,3.5 and saturation, in order to determine what effect soil moisture will exert on the growth and seed production of these weeds. 1. The plant height and plant length increased with increasing soil moisture intensity and reached maximums at pF2.0. The figures were smallest at pF3.5 (Fig. 1.). 2. The number of tillers per plant and number of branches per plant increased in a similar manner and were largest at pF2.0. The number of tillers per plant was smallest at saturation and the number of branches per plant was smallest at pF3.5 (Fig. 2). 3. The leaf area per plant increased as the soil moisture intensity was increased, the value being largest at pF2.0 for both Rottboellia and Solanum. The smallest value was seen at pF3.5 for Rottboellia and at saturation for Solanum (Fig. 3.). 4. Lower soil moisture intensities reduced the T/R ratio in both Rottboellia and Solanum (Table 1). 5. The total dry weight increased at larger pF, the value being largest at pF2.0. At pF3.5 the total dry weight was reduced so severely that practically no seeds were produced in Rottboellia and no fruits formed in Solanum, indicating that both of the weeds can not survive under excessively dry conditions (Fig. 4.). 6. The longest delay in heading and flowering took place at saturation or under excessively moist conditions. The seed production characters (number of spikes per plant, weight of spike, length of spike, number of fruits per plant, weight of fruit) increased with increasing soil moisture intensity, values being largest at pF2.0 and smallest at pF3.5 (Table 2).","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":"eng"}]},"item_1617186783814":{"attribute_name":"Identifier","attribute_value_mlt":[{"subitem_identifier_type":"HDL","subitem_identifier_uri":"http://hdl.handle.net/20.500.12000/3898"}]},"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":"1988-12-05","bibliographicIssueDateType":"Issued"},"bibliographicIssueNumber":"35","bibliographicPageEnd":"112","bibliographicPageStart":"105"}]},"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":"KJ00000161601.pdf","mimetype":"application/pdf","url":{"objectType":"fulltext","url":"https://u-ryukyu.repo.nii.ac.jp/record/2002927/files/KJ00000161601.pdf"},"version_id":"10977c91-7efc-4815-b6d6-734308829589"}]},"item_title":"琉球列島のサトウキビ畑における雑草の生理・生態 : 第 11 報 土壌水分がツノアイアシとテリミノイヌホウズキの生育と種子生産に及ぼす影響(農学部附属農場)","item_type_id":"15","owner":"1","path":["1642837915948","1642838407312"],"pubdate":{"attribute_name":"PubDate","attribute_value":"2008-02-14"},"publish_date":"2008-02-14","publish_status":"0","recid":"2002927","relation_version_is_last":true,"title":["琉球列島のサトウキビ畑における雑草の生理・生態 : 第 11 報 土壌水分がツノアイアシとテリミノイヌホウズキの生育と種子生産に及ぼす影響(農学部附属農場)"],"weko_creator_id":"1","weko_shared_id":-1},"updated":"2022-10-31T01:11:49.980473+00:00"}