Desempenho de cultivares de alface crespa em hidroponia

Abstract

Lettuce (Lactuca sativa L.) is the vegetable most accepted by Brazilian consumers, its consumption grows every year, which requires high productivity to meet demand. The association of cultivation techniques and cultivars adapted to hot and humid climates is an option to increase production. The objective of this work was to evaluate the yield in fresh and dry weight, leaf number, leaf area and chlorophyll content of Brida, Vera and Gabriela cultivars in hydroponic cultivation using the NFT (Nutrient Film Tecnique) method. The experiment was carried out in the municipality of Cláudia in the state of Mato Grosso between November 16, 2020 and January 7, 2021. The experimental design was completely randomized with 3 treatments (Brida, Vera and Gabriela) and 5 repetitions. A significant difference was observed in the total fresh and dry mass, and dry mass of the leaf of the cultivar Gabriela, which presented lower values in relation to the others. The cultivar Vera differed from the others, demonstrating a higher stem dry mass. There was no significant difference for root dry mass in the treatments. There was a significant difference in the chlorophyll content, in which the cultivar Gabriela obtained an increment of 63.6 and 67.4% of chlorophyll, in relation to the levels of Brida and Vera respectively. The number of leaves and leaf area observed in the Brida and Vera cultivars did not show a significant difference, while the Gabriela cultivar showed a lower average than the others. Cultivar Gabriela showed good adaptability and yield compared to other works. Using the NFT hydroponic cultivation technique, Vera and Brida showed high productivity values, demonstrating that they are good alternatives for the producer