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The change in the dietary habits of the population aiming at a healthy diet has caused an increase in the consumption of vegetables, boosting the production, thus having a need to produce them throughout the year. Due to the high content of minerals and vitamins, lettuce is one of the most consumed vegetables in Brazil, but its cultivation during the summer suffers limitations due to the high temperatures, being a cultivar adapted to a mild climate, causing losses of production, Adding value to the product in that period. Thus, hydroponic cultivation has been widely adopted by several producers. The objective of this work was to evaluate the performance of three lettuce cultivars in the hydroponic system by NFT (Nutriente Film Techinique), submitted to five different dosages to analyze their development when submitted to these conditions. The cultivars analyzed were Americana, Corabela and Malice. The dosages tested were 80%, 90%, 100% (control, as a standard dosage recommended by the manufacturer of the tested product), and also at the 110% and 120% dosages of the reference dosage. There was significant interaction between solution and variety factors, indicating that they act dependent on each other. It was concluded that the tested values of nutrient solutions caused a significant difference between the tested variables benefiting or harming the varieties, consequently the quality and production.

Quality and productivity of lettuce under hydroponic system with different dosage of nutritive solutions in Ribeirão Cascalheira-MT