砂丘地における大豆の蒸発散量について

• 矢野 友久

  鳥取大学農学部

• 小谷 住人

  鳥取大学農学部

書誌事項

タイトル別名

• Evapotranspiration from Soybeans in a Sand Dune Area

抄録

Measurement of daily evapotranspiration from soybeans in the Tottori sand dunes, 1985 often showed quite large values of about 9 mm/d during summer and a maximum value was 11. 4 mm/d under the high evaporative condition. The weak correlation was obtained between the measured values (ET) and the calculated ones (ET_p) using the Penman method, because evapotranspiration was greatly influenced by the crop growth condition. The crop coefficient for potential evapotranspiration estimates was approximated by the logistic curve with the leaf area index as the variable. Daily evapotranspiration was estimated with a relatively high accuracy by introducing the crop coefficient into the Penman method. The leaf area index could be replaced with the number of days after germination from a practical point of view. The net radiation method, the radiation method and the pan evaporation method were compared using the Penman method to estimate the accuracy. The Penman method offered the best results for predicting potential evapotranspiration. The pan evaporation method was graded next and the net and solar radiation methods were found to be inferior to the two methods, since they did not include wind speed and humidity terms which had an effect on evapotranspiration.

収録刊行物

• 農業土木学会論文集

  農業土木学会論文集 1986 (126), 25-30,a1, 1986

  社団法人 農業農村工学会

キーワード

• 消費永量
• 相関係数
• 蒸発散位
• ライシメータ
• 豆類
• 作物係数

詳細情報

• CRID: 1390001204542420480
• NII論文ID: 130004347464
• DOI: 10.11408/jsidre1965.1986.126_25
• ISSN: 18847234
• ISSN: 03872335
• データソース種別:
  • JaLC
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可