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Comparative Assessment of Hydroponic Lettuce Production Either under Artificial Lighting, or in a Mediterranean Greenhouse during Wintertime

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  • Orfeas Voutsinos

    (Laboratory of Vegetable Crops, Department of Crop Science, Agricultural University of Athens, Iera Odos 75, 11855 Athens, Greece)

  • Maria Mastoraki

    (Laboratory of Vegetable Crops, Department of Crop Science, Agricultural University of Athens, Iera Odos 75, 11855 Athens, Greece)

  • Georgia Ntatsi

    (Laboratory of Vegetable Crops, Department of Crop Science, Agricultural University of Athens, Iera Odos 75, 11855 Athens, Greece)

  • Georgios Liakopoulos

    (Laboratory of Plant Physiology, Department of Crop Science, Agricultural University of Athens, Iera Odos 75, 11855 Athens, Greece)

  • Dimitrios Savvas

    (Laboratory of Vegetable Crops, Department of Crop Science, Agricultural University of Athens, Iera Odos 75, 11855 Athens, Greece)

Abstract

Butterhead lettuce was grown hydroponically in a vertical farm under high (HLI) and low (LLI) light intensity (310, and 188 μmol m −2 s −1 , respectively) and compared to hydroponically grown lettuce in a greenhouse (GT) during wintertime in Athens, Greece (144 μmol m −2 s −1 ). The highest plant biomass was recorded in the HLI treatment, whereas LLI and GT produced similar plant biomass. However, the LLI produced vortex-like plants, which were non-marketable, while the plants in the GT were normal-shaped and saleable. Net photosynthesis was highest in the HLI and higher in the LLI than in the GT, thereby indicating that light intensity was the dominant factor affecting photosynthetic performance. Nevertheless, the unsatisfactory performance of the LLI is ascribed, not only to reduced light intensity, but also to reduced light uniformity as the LED lamps were closer to the plants than in the HLI. Furthermore, the large solar irradiance variability in the GT resulted in substantially higher adaptation to the increased light intensity compared to LLI, as indicated by chlorophyll fluorescence measurements. Light intensity and photoperiod are believed to be the primary reasons for increased nitrate content in the GT than in the vertical farming treatments.

Suggested Citation

  • Orfeas Voutsinos & Maria Mastoraki & Georgia Ntatsi & Georgios Liakopoulos & Dimitrios Savvas, 2021. "Comparative Assessment of Hydroponic Lettuce Production Either under Artificial Lighting, or in a Mediterranean Greenhouse during Wintertime," Agriculture, MDPI, vol. 11(6), pages 1-16, May.
    • Handle: RePEc:gam:jagris:v:11:y:2021:i:6:p:503-:d:565376
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    References listed on IDEAS

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    1. Weiguo Fu & Pingping Li & Yanyou Wu & Juanjuan Tang, 2012. "Effects of different light intensities on anti-oxidative enzyme activity, quality and biomass in lettuce," Horticultural Science, Czech Academy of Agricultural Sciences, vol. 39(3), pages 129-134.
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    Cited by:

    1. Filippos Bantis & Athanasios Koukounaras, 2023. "Impact of Light on Horticultural Crops," Agriculture, MDPI, vol. 13(4), pages 1-4, April.
    2. Onofrio Davide Palmitessa & Miriana Durante & Beniamino Leoni & Francesco Montesano & Massimiliano Renna & Francesco Serio & Annalisa Somma & Pietro Santamaria, 2021. "Enhancement of a Landrace of Carosello (Unripe Melon) through the Use of Light-Emitting Diodes (LED) and Nutritional Characterization of the Fruit Placenta," Sustainability, MDPI, vol. 13(20), pages 1-15, October.

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