Abstract
Innovation in agriculture caused by 4.0 technologies has allowed significant advances in the way of production, in the quality of the final product and in sustainability. Thus, the objective of this work was to evaluate the effect of photoperiod on different lettuce cultivars in indoor hydroponic cultivation with artificial lighting for the production of baby leaves. For this, the lettuce cultivars BSAC0055, BSAC0155 and BSAL0071 were evaluated in an NFT hydroponic system, under a photoperiod of 14,16,18 and 20 hours with photosynthetically active radiation of 248 µmol m-2 s-1. The effects of the cultivar x photoperiod interaction were significant, with cultivars behaving differently for each photoperiod and vice versa. The BSAC0055 cultivar, regardless of the photoperiod, was superior to the others and adapted to indoor cultivation. For cultivars BSAC0055 and BSAC0155, the photoperiod was significant with a quadratic effect for the number of hours/day close to 16 hours and 45 minutes. It is concluded that cultivars have different management and it is possible to select specific cultivars for indoor production; cultivars respond differentially to photoperiods.
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