SUPLEMENTAÇÃO DE BOVINOS DE CORTE RECRIADOS EM CAPIM-MARANDU DURANTE O PERÍODO SECO

• Ano de defesa: 2025
• Autor(a) principal: LUCAS GONÇALVES MORAES
• Orientador(a): Gelson dos Santos Difante
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Fundação Universidade Federal de Mato Grosso do Sul
• País: Brasil
• Palavras-chave em Português: Brachiaria brizantha; recria de bovinos; suplementação, Bioma Cerrado.
• Link de acesso: https://repositorio.ufms.br/handle/123456789/12314

MORAES, Lucas Gonçalves. Suplementação de bovinos recriados em pasto de capim-marandu durante o período seco. 2025. Dissertação (Mestrado). Faculdade de Medicina Veterinária e Zootecnia, Universidade Federal de Mato Grosso do Sul, Campo Grande, MS, 2025. 54 fls. ABSTRACT Brazilian livestock production faces significant challenges in maintaining efficiency in pasture-based systems, especially during the dry season when forage availability and quality decline sharply. Protein-energy supplementation emerges as a key strategy to mitigate these limitations and ensure adequate animal performance. This study aimed to evaluate the effects of different levels of protein-energy supplementation on the productive and economic performance of Angus × Nelore steers maintained on Brachiaria brizantha cv. Marandu pasture in the Brazilian Cerrado biome during the dry season. The experiment was conducted at Embrapa Beef Cattle, in Campo Grande, MS, using a randomized block design with four treatments (supplementation at 0.2%, 0.4%, 0.6%, and 0.8% of live weight) and three replications. A total of 48 animals were distributed across 12 paddocks of 1.14 ha, managed under continuous stocking. The supplement consisted of ground corn, ground soybean, urea, and mineral salt. The evaluated parameters included average daily gain (ADG), total weight gain (TWG), stocking rate, forage composition, and economic viability. The results showed that supplementation positively affected animal performance, with a linear increase in ADG, ranging from 0.33 kg/day (0.2% LW) to 0.67 kg/day (0.8% LW), and TWG, which varied between 51.87 kg and 101.25 kg throughout the experiment. Stocking rate was also influenced, being higher at greater supplementation levels, reaching 2.73 AU/ha. Regarding forage, mass availability was greater in June and July, with a progressive reduction from August due to seasonal climate effects and plant maturity, impacting forage composition and nutrient availability. Economic analysis indicated that supplementation was financially viable, leading to an increase in revenue per animal from R$ 471.84 (0.2% LW) to R$ 920.94 (0.8% LW). Gross margin per hectare ranged from R$ 1,435.01 to R$ 2,271.04, demonstrating that supplementation offsets additional costs and enhances the profitability of the production system. It is concluded that protein-energy supplementation is an effective alternative to optimize animal performance, reduce the impact of seasonality on forage production, and ensure greater profitability in pasture-based cattle rearing during the dry season in the Brazilian Cerrado biome. Keywords: Beef cattle; Brachiaria brizantha; Cerrado biome; economic analysis; supplementation.