PRODUÇÃO DE SORGO SACARINO BRS 506 EM FUNÇÃO DO MANEJO DA ADUBAÇÃO: ÉPOCA DE CORTE PARA COLHEITA E IRRIGAÇÃO

Sweet sorghum (Sorghum bicolor L. Moench) is standing out in the agroindustry, as a promising source for ethanol production due to its high sugar content, with this there is a need to conduct further studies to evaluate the best ways of crop management. The objective of this study was to evaluate the ways of management regarding the spreading of fertilization, cutting season for harvesting and irrigation of sweet sorghum, in order to seek an arrangement that promotes greater productivity. The experiment was conducted in the field with a randomized block design, in a subdivided plot scheme, with three replications. Two cutting seasons were used, 90 days and 120 days after sowing (DAS), two irrigation managements, 90 and 45 minutes daily, starting from flowering and covering nitrogen fertilization, two and three fertilizations. Plant height, stalk diameter, green stalk mass, total green mass, soluble solids content, broth volume, and soluble solids volume, stalk dry mass and total dry mass. The permanence of the plants in the field for 30 days more results in increase height, green stalk mass and soluble solids content. The irrigation time of 45 minutes daily is enough to supply the need for the cultivation of sorghum in crops with conditions similar to this work. The division of covering fertilization in three times does not result in a significant increase that justifies the adherence of this practice, being recommended the division in two times because the results are similar to the division in three times, but with lower labor cost at the end of the cycle.