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No.26 (1979/12) >

Title :沖縄におけるタバコの蒸発散量について(農業工学科)
Title alternative :Studies on evapotranspiration from a Tobacco field in Okinawa. (Department of Agricultural Engineering)
Authors :吉永, 安俊
山城, 三郎
Authors alternative :Yoshinaga, Anshun
Yamashiro, Saburo
Issue Date :11-Dec-1979
Abstract :1本研究は沖縄におけるタバコの蒸発散量を知る目的で行ったものである。2タバコの栽培密度は沖縄での慣行に従い2083本/haである。3蒸発散量をライシメーターで植付け日の2月22日から収穫終了の6月22日までの全期間について測定した。4タバコの累積蒸発散量にロジステック曲線をあてはめることができた。それを微分すると平均日蒸発散量が求まる。5 10日平均日蒸発散量のピークは2.2mm/day。6 10日平均日蒸発散量のピークは植付け後50日で現われその後, 収穫終了時に向ってなだらかな減少傾向を示す。
1. The purpose of the present investigation was to obtain some knowledge on evapotranspiration of tobacco plants grown in Okinawa. 2. Plants population (2085 plants per hectare) were used in this investigation. 3. Evapotranspiration was measued with lysimeter under natural field conditions during the growing season of tobacco plants from February 22,transplanting time, through june 26,the end of harvesting period. 4. The cumulative evapotranspiration curve was shown with logistic curve, The daily evapotranspiration of tobacco plants were calculated by differentiating the cumulative evapotranspiration curve. 5. The largest value of 10-day averages of daily evapotranspiration were 2.2mm/day. 6. The 10-day averages of daily evapotranspiration came to climax approximately 50 days after transplanting, and it is recognized to decreases slowly for the end of havesting period.
Type Local :紀要論文
ISSN :0370-4246
Publisher :琉球大学農学部
URI :http://hdl.handle.net/20.500.12000/4160
Citation :琉球大学農学部学術報告 = The Science Bulletin of the Faculty of Agriculture. University of the Ryukyus no.26 p.287 -295
Appears in Collections:No.26 (1979/12)

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