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      Quality and Yield of Lettuce in an Open-Air Rooftop Hydroponic System

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      Agronomy
      MDPI AG

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          Abstract

          In this study, the yield and growth performance of lettuce in an open-air rooftop hydroponic system were investigated. Lettuce was grown in a closed recirculating nutrient film technique (NFT) unit using a standard nutrient solution (NS). Yield, fresh weight, and nutrient content in the leaf tissue of the harvested lettuce were measured. The results were compared with the results obtained in indoor hydroponic lettuce growth with artificial lightning. Despite strong winds during the growth period, 25% of the total lettuce heads weighed twice the marketable weight; however, 25% of the total lettuce heads were below the marketable weight. A more efficient nutrient uptake was indicated by the lettuces in the rooftop system compared with the uptake in the indoor system. Foliar analysis revealed a higher content of all nutrients in the leaves of rooftop hydroponic lettuce compared with indoor hydroponic lettuce. This study suggests that hydroponic rooftop-grown lettuce can be competitive with their indoor counterparts if the rooftop hydroponic system is protected from extreme weather conditions.

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          Can cities become self-reliant in food?

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            Environmental assessment of an integrated rooftop greenhouse for food production in cities

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              Exploring the production capacity of rooftop gardens (RTGs) in urban agriculture: the potential impact on food and nutrition security, biodiversity and other ecosystem services in the city of Bologna

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                Author and article information

                Journal
                ABSGGL
                Agronomy
                Agronomy
                MDPI AG
                2073-4395
                December 2021
                December 19 2021
                : 11
                : 12
                : 2586
                Article
                10.3390/agronomy11122586
                619c9c43-2909-4319-a2df-b47b879e78a7
                © 2021

                https://creativecommons.org/licenses/by/4.0/

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                Self URI (article page): https://www.mdpi.com/2073-4395/11/12/2586

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