{"created":"2021-03-01T06:43:33.029407+00:00","id":25578,"links":{},"metadata":{"_buckets":{"deposit":"9939ee7d-5fef-4d6b-af1d-073445977aac"},"_deposit":{"id":"25578","owners":[],"pid":{"revision_id":0,"type":"depid","value":"25578"},"status":"published"},"_oai":{"id":"oai:repository.dl.itc.u-tokyo.ac.jp:00025578","sets":["27:2466:2467:2589","9:504:2469:2590"]},"item_4_alternative_title_1":{"attribute_name":"その他のタイトル","attribute_value_mlt":[{"subitem_alternative_title":"Estimation of annual canopy transpiration rates on upper, middle, and lower plots along a slope in a manmade 19-year-old Cryptomeria japonica stand"}]},"item_4_biblio_info_7":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"1987","bibliographicIssueDateType":"Issued"},"bibliographicPageEnd":"196","bibliographicPageStart":"177","bibliographicVolumeNumber":"76","bibliographic_titles":[{"bibliographic_title":"東京大学農学部演習林報告"}]}]},"item_4_description_5":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"斜面の上方にむかうにしたがって樹高が低くなる19年生スギ人工林において，蒸散量の推定方法をこまかく検討し，生育に差を生じる原因を水分消費の面から考えた。斜面上部（Plot 1），中部（Plot 3），下部（Plot 5）に調査区を設け，供試木の樹液流量（＝蒸散量）をヒートパルス法によりもとめた。ヒートパルス法による測定は，1983年2～12月にかけて，48日間行ない，日蒸散量を計算した。蒸散量は環境条件や個体の大きさで変化する。供試木の日蒸散量は，日射量を基準にした天気区分とよく対応する。また，個体の大きさとの関係では，DB・CL（生枝下高直径と樹冠長の積）と，斜面上の位置にかかわりなくよく対応する。DB・CLと日蒸散量の関係をあてはめて推定した各調査区の日蒸散量は，Plot 1が0.6～3.9，Plot 3が0.7～4.0，Plot 5が0.5～3.3mm・day－1の範囲にある。これらの日蒸散量と天気区分との対応関係からもとめた各調査区の年蒸散量は，Plot 1が710，Plot 3が760，Plot 5が610mmとなる。各調査区の年蒸散量の大小は，葉量の大小と関係が深く，単位葉量あたりの年蒸散量には調査区間の差がない。このスギ林の斜面上部と下部では樹高に著しい差があるが，最近の樹高生長にはほとんど差がない。このことは，各調査区間の蒸散量に，現在大きな差がなかったことに対応すると思われる。調査地を樹高に基づいてPlot 1型，Plot 3型，Plot 5型に区分し，それぞれの面積比と各調査区の年蒸散量とからもとめた調査地の年蒸散量は690mmで，年降水量2890mmの約24％にあたる。","subitem_description_type":"Abstract"},{"subitem_description":"It is well-known that the growth of Cryptomeria japonica on the slope decreases from the bottom to the ridge. To discuss causes of this growth depression from the point of water comsumption, a method for estimating the difference in canopy transpiration rate was studied along a slope. Measurements of sap flow velocity using heat-pulse method were made on the three plots, Plot 1 near the ridge, Plot 3 near the middle of slope and Plot 5 near the bottom, in a 19-year-old Cryptomeria japonica stand where the tree height became lower with ascending the slope. Diurnal courses in sap flow velocity of 3 to 6 sample trees in each plot were obtained for 48 daytime periods from February to December in 1983. The transpiration rates per tree were calculated by multiplying the sap flow velocity by the cross section area of sapwood. Since the sap flow velocity was affected by radiation, the daily transpiration rates were closely correlated with the weather class classified by radiation flux density. The transpiration rate increased with tree dimension and was correlated with several parameters indicating the dimension, especially with the DB・CL, diameter at crown height × crown length irrespective of difference in tree height among the plots. The canopy transpiration rate in each plot was estimated by using the weather class and the parameter DB・CL. The daily canopy transpiration rates estimated were 0.6～3.9 in Plot 1, 0.7～4.0 in Plot 3, and 0.5～3.3 mm in Plot 5, and the annual ones were 710 in Plot 1, 760 in Plot 3, and 610 mm in Plot 5. The difference in canopy transpiration rate among the plots is probably caused by leaf amount and the difference in transpiration rate per unit leaf weight is not remarkable. Height growth rate in recent years did not differ among the plots which may be corresponds with not apparent difference in water consumption. The annual canopy transpiration rate averaged in the entire study area was 690 mm, which amounts to 24% of the annual precipitation 2890 mm in 1983.","subitem_description_type":"Abstract"}]},"item_4_full_name_3":{"attribute_name":"著者別名","attribute_value_mlt":[{"nameIdentifiers":[{"nameIdentifier":"55474","nameIdentifierScheme":"WEKO"}],"names":[{"name":"TANGE, Takeshi"}]}]},"item_4_publisher_20":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"東京大学大学院農学生命科学研究科附属演習林"}]},"item_4_source_id_10":{"attribute_name":"書誌レコードID","attribute_value_mlt":[{"subitem_source_identifier":"AN00162451","subitem_source_identifier_type":"NCID"}]},"item_4_source_id_8":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"03716007","subitem_source_identifier_type":"ISSN"}]},"item_4_subject_15":{"attribute_name":"日本十進分類法","attribute_value_mlt":[{"subitem_subject":"610","subitem_subject_scheme":"NDC"}]},"item_4_text_21":{"attribute_name":"出版者別名","attribute_value_mlt":[{"subitem_text_value":"The Tokyo University Forests"}]},"item_4_text_4":{"attribute_name":"著者所属","attribute_value_mlt":[{"subitem_text_value":"東京大学農学部千葉演習林"},{"subitem_text_value":"University forest in Chiba, Faculty of Agriculture, University of Tokyo"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"丹下, 健"}],"nameIdentifiers":[{"nameIdentifier":"55473","nameIdentifierScheme":"WEKO"}]}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2017-06-09"}],"displaytype":"detail","filename":"esrh076005.pdf","filesize":[{"value":"1.1 MB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"esrh076005.pdf","url":"https://repository.dl.itc.u-tokyo.ac.jp/record/25578/files/esrh076005.pdf"},"version_id":"f2f909d6-1ea1-4533-ba1e-9e5c604be8a4"}]},"item_language":{"attribute_name":"言語","attribute_value_mlt":[{"subitem_language":"jpn"}]},"item_resource_type":{"attribute_name":"資源タイプ","attribute_value_mlt":[{"resourcetype":"departmental bulletin paper","resourceuri":"http://purl.org/coar/resource_type/c_6501"}]},"item_title":"19年生スギ人工林の斜面上部，中部，下部における年蒸散量の推定","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"19年生スギ人工林の斜面上部，中部，下部における年蒸散量の推定"}]},"item_type_id":"4","owner":"1","path":["2590","2589"],"pubdate":{"attribute_name":"公開日","attribute_value":"2014-09-03"},"publish_date":"2014-09-03","publish_status":"0","recid":"25578","relation_version_is_last":true,"title":["19年生スギ人工林の斜面上部，中部，下部における年蒸散量の推定"],"weko_creator_id":"1","weko_shared_id":null},"updated":"2022-12-19T04:03:46.326408+00:00"}