2026-03-052026-03-052024-02-22https://repositorio.ifal.edu.br/handle/123456789/1425When introducing a crop into a location outside its traditional cultivation area, it is important to assess the morphological and productive behavior of that crop, aiming to draw conclusions about its adaptation to the new planting location. The objective of this study was to evaluate the growth and productivity of sunflower genotypes in the specific conditions of the Alagoas Semiarid region, assessing the effects of two different planting densities. The experimental design adopted was randomized blocks in a factorial scheme (3x2), with three sunflower genotypes and two planting densities, with four replications, totaling 24 experimental units. The total area of the experiment was 350 square meters, and each experimental unit measured 4 x 2.80 meters, consisting of five rows of plants spaced 0.7 meters apart. The spacing factor consisted of two levels, 0.2 and 0.4 meters between plants. The genotype factor consisted of three levels: Multissol, SYN 045, and ADV 5504. Plant height, stem diameter, leaf area, head diameter, thousand-seed weight, and productivity were measured. Plant height, stem diameter, leaf area, seed weight, and productivity are sensitive variables to different planting configurations. Wider spacings favor productivity, while narrower spacings negatively affect head diameter. Reduced planting spacings (0.2 m between plants) resulted in higher grain productivity for the SYN 045 and ADV 5504 hybrids (2,156.08 kg ha-1 and 2,352.22 kg ha-1 , respectively). However, the Multissol cultivar was the most productive when grown in the widest spacing, with an average of 2,284.16 kg ha-1ptHelianthus annuus L.Densidade populacionalDesempenho agronômicoProdutividadePopulation densityAgronomic performanceProductivtyTrabalho de Conclusão de CursoCIENCIAS AGRARIAS