2026-08-122026-08-122023-01-25Gouveia, Fernanda do Nascimento. Uso de telas de sombreamento na produção de cultivares de alface. / Fernanda do Nascimento Gouveia. – 2023. Trabalho de Conclusão de curso (graduação em Engenharia Agronômica) - Instituto Federal de Alagoas, Campus Piranhas, Piranhas, 2023. Orientação: Prof. Dr. Ênio Gomes Flôr Souza 1. Lactuca Sativa L.. 2. Ambiente protegido. 3. Semiárido. 4. Sombrete. I. Título.https://repositorio.ifal.edu.br/handle/123456789/3154The lettuce is considered the main leafy vegetable consumed in natura and has great economic importance, however, its cultivation presents some limitations due to edaphoclimatic factors, since, when produced in unfavorable environmental conditions, the plant is induced to precocious sprouting and low quality, thus, the lettuce cannot reach the maximum genetic potential, being necessary the search for techniques to make the production of the plant viable. One alternative is the use of screens to reduce the negative effects of adverse meteorological factors. Therefore, the objective of this research was to evaluate the effect of the use of shading screens on the agronomic viability of the production of lettuce cultivars. The experiment was conducted at the Federal Institute of Alagoas, Campus Piranhas, during the summer of 2022. The experimental design used was the randomized block design in a subdivided plot, with four repetitions. The plots were composed by shading conditions (no shading, 50% black shading and 80% black shading) and the subplots formed by the cultivars Saia Veia (flat), Elba (green-leaf lettuce) and Angelina (iceberg lettuce). The cultivar Saia Veia showed higher values for plant height and diameter, stem diameter, number of leaves and green mass. Saia Veia was the cultivar that showed the best agronomic performance and Angelina showed greater tolerance to plant stretching. Both shading screens (50% and 80%) stimulated the growth of the stem (stretching) and the increase of green mass.ptLactuca sativa LAmbiente protegidoSemiáridoSombriteProtected environmentSemiaridShadingTrabalho de Conclusão de CursoCIENCIAS AGRARIAS::AGRONOMIA