Rendimento de cultivares de alface em sistema hidropônico no norte do Mato Grosso

Abstract

Lettuce (Lactuca sativa L.) is one of the most consumed vegetables in Brazil and in the world, being very important economically. The choice of cultivar is essential to ensure good productivity. The objective of this work was to evaluate the yield, chlorophyll and nitrate content of Regina, Gabi and Caipira 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 (Caipira, Regina, Gabi), 5 repetitions and 4 repetition plants. The method for obtaining the nitrate content was the salicylic acid procedure proposed by Cataldo et al, (1975). There was no significant difference in fresh and dry mass. There was a significant difference in the dry mass of the stem of the Caipira cultivar in relation to the others, the represented value was lower, demonstrating a smaller stem size. The chlorophyll A and B content was higher in the Caipira cultivar. The cultivar Regina had the highest number of leaves. The nitrate content was higher in the Caipira cultivar, but the levels of the analyzed cultivars remained below the maximum value required by the European Union, which can be consumed daily. Using the NFT hydroponic cultivation technique, the three cultivars showed high values of productivity and adaptability in the region in question, demonstrating that they are good alternatives for the producer.