Estudo da aplicação de iluminação artificial em um modelo de plantio vertical

Abstract

This work aimed to analyze the application of artificial lighting on crispy lettuce cultivars, through the use of LEDs, applied to a new planting methodology known as Vertical Farms. For this purpose, a prototype vertical planting model was built, consisting of 21 isolated production units, equipped with sensors to collect environmental data and actuators for controlling RGB intermittent lighting and hydroponic irrigation. With the built model, two experimental tests were carried out: evaluation of the application of different light treatments (red, blue, purple, white) and application of different white light intensities (36 LEDs, 54 LEDs and 72 LEDs). In both experiments, lasting 30 days, the analyzes of the total fresh mass weight, dry mass weight, leaf area and number of leaves were carried out. of the white spectrum (combination between red, blue and green), presented the best results in all analyzed variables, followed by the purple spectrum (combination between red and blue), in contrast, the red treatment presented the worst results, considering that the referring samples at the same they perished after 15 DAT. In the second experiment, after a regression analysis, it was observed that the light intensity was the variable that most influenced the obtained masses (dry mass and fresh mass), on the other hand, the light intensity had no significant influence with the number of sheets. This study was financed in part by the Coordenaçãoo de Aperfeiçoamento de Pessoal de Nível Superior - Brasil (CAPES) - Finance Code 001.