Desempenho e eficiência econômica de novilhos em pastagem de Brachiaria brizantha cv. Marandu na transição águas/seca submetidos a diferentes regimes alimentares

• Ano de defesa: 2011
• Autor(a) principal: Melo, Adilson Antonio de
• Orientador(a): Paulino, Mário Fonseca
• Banca de defesa: Lana, Rogério de Paula
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Viçosa
• Programa de Pós-Graduação: Mestrado Profissionalizante em Zootecnia
• Departamento: Genética e Melhoramento de Animais Domésticos; Nutrição e Alimentação Animal; Pastagens e Forragicul
• País: BR
• Palavras-chave em Português: Novilho; Nutrição; Desempenho
• Palavras-chave em Inglês: Calf, Nutrition, Performance
• Área do conhecimento CNPq: CNPQ::CIENCIAS AGRARIAS::ZOOTECNIA::NUTRICAO E ALIMENTACAO ANIMAL
• Link de acesso: http://locus.ufv.br/handle/123456789/5965

This study used 60 Nelore calves, with average initial body weight of 285 kg. The treatments were: (MS) Mineral Supplement, SUP1 Protein-Energy-Mineral Supplement, being the source of non-protein nitrogen (NPN) slow-release urea, with average daily intake of 0.7% of body weight (BW) in dry matter (DM), SUP2 Protein-Energy-Mineral Supplement, being the source of NPN conventional urea with an average daily intake of 0.7% of the BW in DM. The type of experimental design used applied was randomizedPerformance and economic efficiency of calves in pasture of Brachiaria brizantha cv. Marandu during wet-dry transition subjected to different diets. blocks with three treatments and four replications. It was used the Duncan test for statistical analysis on the animals performance. There was a difference in the results of SUP1 and SUP2 compared with the MS, with average daily gains of 0.367 and 0.458 kg/animal/day for SUP1 and SUP2 respectively and 0.166 kg/animal/day for the MS (P<0.05). There was no difference in average daily gain (ADG) (P>0.05) between the SUP1 and SUP2. The animals supplemented with protein-energy-mineral supplementation had greater gains than those submitted to mineral supplement during the period of transition water-dry. There were positive economic results for all treatments, and the best results came from the calves that received the protein-energy supplementation (SUP1 and SUP2). The highest gross margin was observed for animals in the treatment SUP2, R$45.12 animal/period, compared to the control treatment, R$ 29.81 animal/period, suggesting that protein-energy supplementation promoted higher economic return. Thus, there was no statistical difference (p>0,05) between SUP1 and SUP2 to for weight gain and also for additional intake of CP and TDN, and the two treatments showed superior results to the SM. The SUP2 treatment was superior economically to SUP2 and SM and SUP1, as for it had higher gross margin left to the experiment.