2025-08-212025-08-212021-10-14https://repositorio.ifal.edu.br/handle/123456789/1156In the western region of Alagoas, there is an obstacle in the production of food for animals: low productivity, resulting in few stocks of feed for the dry season, which can last for months or years. Dealing with this issue, it is necessary to study different sorghum cultivars that enable the producer to use genetic materials that best develop in his property. There is also the importance of the analysis of planting densities, in order to favor greater growth and productivity to the culture. Therefore, the objective was to evaluate the biomass accumulation of sorghum cultivars produced at two planting densities in the western region of Alagoas. The experiment was conducted in the experimental field of the Federal Institute of Alagoas, Piranhas Campus, in dryland cultivation, between June and September 2019, under randomized block design, with treatments arranged in a 4 x 2 factorial scheme, with four repetitions. The treatments consisted of four sorghum cultivars, three forage (BRS Ponta Negra, IPA 467, and Chopper) and one grain (IPA 1011), and two planting densities: 187.5 thousand plants ha-1 (three plants per pit every 0.20 m) and 250 thousand plants ha-1 (two plants per pit every 0.10 m). At the pasty/farinaceous grain stage, the following were evaluated: fresh and dry masses of leaves, stem, panicle, and total; percentage of dry mass; and productivity of fresh and dry mass. The planting densities did not influence the aboveground biomass accumulation of the sorghum cultivars. The average dry mass accumulation reached 27.47 g plant-1 in the stem, 17.20 g plant- 1 in the leaves and 7.45 g plant-1 in the panicle. The cultivars BRS Ponta Negra and IPA 467 obtained the highest total values of fresh and dry mass, while Chopper and IPA 1011 accumulated more panicle biomass than the others. The fresh mass yields were 42.84 t ha-1 (BRS Ponta Negra), 39.95 t ha-1 (IPA 467), 28.85 t ha-1 (IPA 1011) and 23.41 t ha-1 (Chopper), with an average dry mass percentage of 28.81 %. In both planting densities studied, the cultivars BRS Ponta Negra, IPA 467 and IPA 1011 constituted genetic materials of high potential for biomass production in the edaphoclimatic conditions of Alagoas.ptSorghum bicolorEspaçamentoSequeiroSemiárido estado de AlagoasSorghum bicolor (L.)MoenchForragemForageSpacingDrylandSemiaridTrabalho de Conclusão de CursoENGENHARIAS