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  1. 紀要論文
  2. 琉球大学農学部学術報告
  3. 36号
  1. 部局別インデックス
  2. 農学部

サトウキビに対するかんがい時期について(農業工学科)

http://hdl.handle.net/20.500.12000/3878
http://hdl.handle.net/20.500.12000/3878
74c3f4f4-e967-4569-9c9a-2b85f7463508
名前 / ファイル ライセンス アクション
KJ00000161620.pdf KJ00000161620.pdf
Item type デフォルトアイテムタイプ(フル)(1)
公開日 2008-02-14
タイトル
タイトル サトウキビに対するかんがい時期について(農業工学科)
言語 ja
作成者 山城, 三郎

× 山城, 三郎

ja 山城, 三郎

Yamashiro, Saburo

× Yamashiro, Saburo

en Yamashiro, Saburo

アクセス権
アクセス権 open access
アクセス権URI http://purl.org/coar/access_right/c_abf2
内容記述
内容記述タイプ Other
内容記述 本研究は,ポット試験によってサトウキビに対するかんがい開始時期について検討するものである。上記の目的を達成するために,サトウキビの蒸散流速,蒸散量,土壌水分および土壌の水分張力(pF)を測定し,これらの相互関係について調べた。さらに,蒸散流速および蒸散量の時間変化と気象要因との関係についても検討した。その結果,蒸散流速,蒸散量,土壌水分および土壌の水分張力の変動からサトウキビに対するかんがい開始の時期としては土壌の水分張力がpF3.7∿pF3.8になった場合が適当であることがわかった。蒸散流速はこのpF値付近においてはほぼ一定の値となった。また,蒸散流速および蒸散量の時間変化と気象要因の関係から,蒸散流速は蒸散量の指標として,十分役立つことがわかった。このようにして蒸散流速をモニタリングすることによって,サトウキビがいつ水分欠乏をきたし,いつかんがいすべきであるかを知ることが可能である。
内容記述タイプ Other
内容記述 This study was done in order to investigate when to irrigate for sugar cane. The sugar cane which was used in this test was planted in pots. To attain this purpose, sap flow velocity and transpiration of sugar cane, soil moisture and soil moisture tension were measured. I investigated the relationship bitween them. Between sap flow velocity, the mean value of hourly transpiration rate and weather were also investigated. It became clear that a daily monitoring of sap flow velocity, transpiration rate, soil moisture content and soil moisture tension indicated that sugar cane needs to be irrigated whenever the soil moesture tension reaches a pF value between 3.7 and 3.8. From these pF value, the sap flow velocity became nearly constant. From the observation made, it seemed clear that both the sap flow velocity and the transpiration rate were equally influenced by the weather. It also appeared evident that sap flow velocity could serve quite well as an index of transpiration rate. Thus by monitoring sap flow velocity, it could be possible to tell when the sugar cane plants are experiencing water stress and thus requireing further water application.
内容記述タイプ Other
内容記述 紀要論文
出版者
言語 ja
出版者 琉球大学農学部
言語
言語 jpn
資源タイプ
資源タイプ departmental bulletin paper
資源タイプ識別子 http://purl.org/coar/resource_type/c_6501
出版タイプ
出版タイプ VoR
出版タイプResource http://purl.org/coar/version/c_970fb48d4fbd8a85
識別子
識別子 http://hdl.handle.net/20.500.12000/3878
識別子タイプ HDL
収録物識別子
収録物識別子タイプ ISSN
収録物識別子 0370-4246
収録物識別子タイプ NCID
収録物識別子 AN00250548
収録物名
言語 ja
収録物名 琉球大学農学部学術報告
書誌情報
号 36, p. 73-87, 発行日 1989-12-05
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