Analysis of Leaf Heat Balance Affected by Operation of a Frost Protective Fan in Tea Fields

• KIMURA Kensuke

  Graduate School of Bioresource and Bioenvironmental Sciences, Kyushu University

• MARUO Kyosuke

  Graduate School of Bioresource and Bioenvironmental Sciences, Kyushu University

• OOKI Takahiro

  Graduate School of Bioresource and Bioenvironmental Sciences, Kyushu University

• NAKAZONO Kentaro

  Fukuoka Agriculture and Forestry Research Center Yame Branch Station

• MATSUO Kiyoshi

  National Agriculture and Food Research Organization Institute of Vegetable and Tea Science

• KITANO Masaharu

  Faculty of Agriculture, Kyushu University

抄録

Under climate change, frosts in agricultural fields often bring serious damage to crops. Accordingly, it is keenly desired to improve frost protection methods based on the quantitative evaluation of their effects. The method for quantifying the thermal effect brought by operation of frost protection methods was newly developed based on analysis of leaf heat balance, where leaf boundary layer conductance was continuously determined in field conditions by applying artificial model leaves and a mathematical model. Reliability of the newly developed method was demonstrated in a tea field under the operation of a frost protective fan. The frost protective fan operating at the upper layer of a thermal inversion with strong radiative cooling enhanced convective heat transfer with increased the leaf boundary layer conductance and the ambient air temperature by supplying leaves with warm air. As a result, sensible and latent heat fluxes were significantly increased, which brought a rise of leaf temperature. This thermal effect brought by the fan operation was remarkably fluctuated due to the fan oscillation and advection from the surrounding field, while increasing gradually until just before sunrise when the lowest leaf temperature was observed. Thus, the newly developed method based on the heat balance analysis can be expected to contribute to the improvement of frost protection methods.

収録刊行物

• Ｅｎｖｉｒｏｎｍｅｎｔ　Ｃｏｎｔｒｏｌ　ｉｎ　Ｂｉｏｌｏｇｙ

  Ｅｎｖｉｒｏｎｍｅｎｔ　Ｃｏｎｔｒｏｌ　ｉｎ　Ｂｉｏｌｏｇｙ 54 (3), 125-131, 2016

  日本生物環境工学会

キーワード

• artificial model leaf
• frost protection
• leaf boundary layer conductance
• eaf heat balance

詳細情報

• CRID: 1390001205259205632
• NII論文ID: 130006898296
• NII書誌ID: AA12029220
• DOI: 10.2525/ecb.54.125
• ISSN: 18830986
• ISSN: 1880554X
• NDL書誌ID: 027487416
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I027487416
• Web Site: https://www.jstage.jst.go.jp/article/ecb/54/3/54_125/_pdf
• 本文言語コード: en
• データソース種別:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可