Supplemental LED lighting improves fruit growth and yield of tomato grown under the sub-optimal lighting condition of a building integrated rooftop greenhouse (i-RTG)
Appolloni, Elisa (Università di Bologna. Dipartimento di Scienze Agrarie e Alimentari)
Paucek, Ivan (Università di Bologna. Dipartimento di Scienze Agrarie e Alimentari)
Pennisi, Giuseppina (Università di Bologna. Dipartimento di Scienze Agrarie e Alimentari)
Stringari, Gaia (Universitat Autònoma de Barcelona. Departament d'Enginyeria Química, Biològica i Ambiental)
Gabarrell Durany, Xavier (Universitat Autònoma de Barcelona. Institut de Ciència i Tecnologia Ambientals)
Orsini, Francesco (Università di Bologna. Dipartimento di Scienze Agrarie e Alimentari)
Gianquinto, Giorgio (Università di Bologna. Dipartimento di Scienze Agrarie e Alimentari)

Data:	2022
Resum:	The metabolism of a building can be connected to a rooftop greenhouse, exchanging energy, water and CO2 flows, therefore reducing emissions and recycling cultivation inputs. However, integrating a rooftop greenhouse onto a building requires the application of stringent safety codes (e. g. , fire, seismic codes), to strengthen and secure the structure with safety elements such as thick steel pillars or fireproof covering materials. These elements can shade the vegetation or reduce solar radiation entering the rooftop greenhouse. Nevertheless, application of additional LED light can help to overcome this constraint. The present study evaluated supplemental LED light application in an integrated rooftop greenhouse (i-RTG) at the ICTA-UAB research institute, located in Barcelona (Spain), for tomato cultivation (Solanum lycopersicum cv. Siranzo). The experiment explored the effects of three LED lighting treatments and a control cultivated under natural light only (CK). Applied treatments, added to natural sunlight, were: red and blue (RB), red and blue + far-red (FR) for the whole day, and red and blue + far-red at the end-of-day (EOD), each for 16 h d−1 (8 a. m. -12 a. m. ) with an intensity of 170 µmol m−2 s−1. The results indicate that LED light increased the overall yield by 17% compared with CK plants. In particular, CK tomatoes were 9. 3% lighter and 7. 2% fewer as compared with tomatoes grown under LED treatments. Fruit ripening was also affected, with an increase of 35% red proximal fruit in LED-treated plants. In conclusion, LED light seems to positively affect the development and growth of tomatoes in building integrated agriculture in the Mediterranean area.
Ajuts:	European Commission 862663 Agència de Gestió d'Ajuts Universitaris i de Recerca 2020PANDE00021 Ministerio de Economía y Competitividad CTM2016-75772-C3
Nota:	Unidad de excelencia María de Maeztu CEX2019-000940-M
Drets:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Llengua:	Anglès
Document:	Article ; recerca ; Versió publicada
Matèria:	Light emitting diode ; Rooftop greenhouse ; Building-integrated agriculture ; Solanum lycopersicum ; Chilling injury
Publicat a:	Horticulturae, Vol. 8, Issue 9 (September 2022) , art. 771, ISSN 2311-7524

Adreça alternativa: https://www.mdpi.com/2311-7524/8/9/771
DOI: 10.3390/horticulturae8090771

15 p, 1.6 MB

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