Study of the Evapotranspiration Models of Tomato in Subtropics Greenhouse

亞熱帶溫室其番茄蒸發散量模式研究

陳令錫(Ling-Hsi Chen) ； 陳加忠(Chiachung Chen)

《農林學報》 66卷1期 (2018/03) Pp. 37-44

https://doi.org/10.30089/JAF.201803_66(1).0004

摘要

Evapotranspiration (ET) is a typical biological environmental model. This model can be incorporated to the greenhouse microclimate, ecological environment and physiological environment model. ET is the primary process affecting the leaf temperature, crop water requirement and greenhouse microclimate. Affecting factors involved include air temperature, leaf temperature, air relative humidity, wind speed and solar radiation. In this study, the simple form of ET models of tomato in subtropics greenhouse were proposed to observe the main influencing factors of ET. The significant effect of these factors were evaluated with statistical regression technique. The results indicated that both the solar radiation and vapor pressure deficit are the significant factors on ET values. Solar radiation was the dominating factor in the high radiation condition. The variable of solar radiation can explain 80% of the variation of the evapotranspiration for tomato. It provides a simple way to control the irrigation works.

關鍵字

Validation ； Evapotranspiration model ； Regression

並列摘要

蒸發散量模式為一個典型的生物環境模式。此模式可以與溫室微氣候模式、生態模式與生理模式等相互結合。蒸發散量影響了葉片溫度，作物水分與溫室微氣候。其影響因子包括空氣溫度、葉片溫度、空氣相對溼度、風速與日照能量。在此研究中，提出亞熱帶番茄蒸發散量的簡易模式，以實際量測值進行驗證，藉以評估其主要影響因子。影響因子之顯著性由統計迴歸技術檢驗。此研究結果顯示，日照量與蒸汽壓差為顯著影響因子。在高幅射量的情況下，日照量有80%以上之影響能力。此結果可應用於灌溉作業之自動控制。

並列關鍵字

驗證 ； 蒸發散量 ； 迴歸