Oliveira, Ermelinda Maria MotaAlves, José Ligiã Macêdo2025-07-172025-07-172025-07-03Alves, José Ligiã Macêdo. Uso de adubo foliar em adubação de cobertura na alface crespa (Lactuca sativa). Orientadora: Ermelinda Maria Mota Oliveira. 2025. 42f. Trabalho de Conclusão de Curso (Graduação em Engenharia Agronômica) - Unidade Acadêmica Especializada em Ciências Agrárias, Universidade Federal do Rio Grande do Norte, Macaíba, 2025.https://repositorio.ufrn.br/handle/123456789/64523The use of foliar fertilizers can serve as a supplement to soil fertilization and as a quicker method for correcting possible nutrient deficiencies. Due to this, the practice has become increasingly adopted by producers of vegetable crops, especially leafy greens. The present study aimed to evaluate the performance of curly lettuce plants, variety Bs Ac0055, in response to different concentrations of the foliar fertilizer Glutamina Extra®. The experiment was conducted in the Experimental Area of the Agronomic Engineering program at the Agricultural School of Jundiaí (EAJ/UFRN), located in the municipality of Macaíba/RN, using a randomized block design (RBD) with five treatments and five replications, as follows: T1 – control (0.0 mL/L); T2 – 1.0 mL/L; T3 – 1.5 mL/L; T4 – 2.0 mL/L; and T5 – 3.0 mL/L of Glutamina Extra®. The foliar applications were performed at 14, 21, and 28 days after transplanting, using a spray volume equivalent to 400 L/ha. The variables analyzed were: plant height (cm), root length (cm), number of leaves, canopy diameter (cm), shoot fresh weight (g), root fresh weight (g), and root dry weight (g). No effect of foliar fertilizer concentrations was observed on the evaluated variables.pt-BRAttribution 3.0 Brazilhttp://creativecommons.org/licenses/by/3.0/br/Lactuca sativaaspectos produtivosbiofertilizantesefeito da concentração.productive aspectsbiofertilizersconcentration effect.bachelorThesis