Cultivo de alface crespa produzidas em hidroponia em diferentes ambientesde cultivo

Abstract

The cultivation of lettuce in hydroponics is growing in Brazil, which makes it necessary to conduct studies to evaluate the cultivars available on the market in various locations and growing environments, since some may present variations in agronomic performance depending on specific conditions. The aim of this study was to evaluate the agronomic performance of commercial lettuce cultivars of the loose leaf group in a hydroponic cultivation system in two different covering environments: greenhouse covered with low density polyethylene and red roof photo converter. The randomized block design was used with three repetitions and ten cultivars (Amanda, Brida, Caipira, Camila, Cristal, Invicta, Solaris, Thais, Vanda, and Vera). The variables analyzed were: total and commercial fresh mass; stem and root fresh mass; number of leaves; stem length and diameter, and dry mass content. The Brida cultivar showed the highest total fresh mass (330.08 g plant-1) and commercial fresh mass (308.50 g plant-1) when grown on polyethylene cover and also the highest total fresh mass (341.2 g plant-1) and commercial fresh mass (322.6 g plant-1) when grown on red canvas. All cultivars evaluated, in both growing environments, presented standard for the fresh market.