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Food quality is considered to be one of the main food and nutritional security requirements and is related to consumer guarantee, availability and health. The present work had as main objective to evaluate the quality of lettuce of the curly group, cv. Vera, in organic, conventional and hydroponic cultivation systems commercialized in the island of. The experiment was conducted between June, July and August 2017. The samples were obtained directly from the producer in their respective cultivation systems, collected between 6am and 8am in the morning. The characteristics: shoot fresh mass, root fresh mass, root length, leaf width, leaf length and number of leaves were significantly influenced by the cropping systems, but the total fresh mass characteristic was not significantly influenced by the systems. of cultivation. The highest production of Total Fresh Pasta and the Aerial Part of the Plant were obtained by plants cultivated in the conventional cultivation system (262.10g plant-1 and 239.90g plant-1). The hydroponic cultivation system provided plants with higher yield of fresh root mass, root length, leaf width and leaf length. There was significant effect of the cropping systems on the soluble solids, ascorbic acid and nitrate contents of lettuce leaves. The highest vitamin C content was observed in the leaves of the organic system plants 14.97mg / 100g-1, and the lowest content in the hydroponic system plants was 7.75mg / 100g-1. The conventional system presented greater influence of soluble solids (3.33%). Nitrate content in the organic cultivation system (40 μg / g) was lower than that observed in conventional and hydroponic cultivation systems (90 μg / g).

Qualidade de alfaces comercializadas na ilha de São Luís - MA, produzidas sob diferentes sistemas de cultivo