Nível de atendimento das exigências de proteína bruta para bovinos em pastejo via suplementação

• Ano de defesa: 2015
• Autor(a) principal: Hoffmann, Alvair
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Mato Grosso; Brasil; Instituto de Ciências Agrárias e Ambientais (ICAA) – Sinop; UFMT CUS - Sinop; Programa de Pós-Graduação em Zootecnia
• Palavras-chave em Português: Consumo; Desempenho; Eficiência microbiana; Exigências; CNPQ::CIENCIAS AGRARIAS::ZOOTECNIA; Digestibility; Intake; Performance; Microbial efficiency; Requeriment
• Link de acesso: http://ri.ufmt.br/handle/1/2083

The objective was to assess the nutritional parameters and the performance (ADG) of beef cattle grazing in the dry season fed with supplements to provide 50%, 75% and 100% of crude protein (CP) requirements for to gain 0.5 kg/day, predicted by BR-Corte system. Twenty-one castrated crossbred steers, with 30 months old and 434.4 ± 42.6 kg of body weight (BW), were used. The supplement was offered twice daily, with 6.66 gDM/kg BW of concentrate and 5.50 g DM/kg BW of corn silage . There was no effect on pasture DM and total digestible nutrients (TDN) intake. The attendance 100% of requirements provided higher digestibility of CP (49.96%), but no effect for DM and NDFap. The attendance of 50% of the requirements resulted in lower ADG (0.34 g/day). The attendance of at least 75% of CP requirements through supplements for grazing cattle, during the dry season results in predicted AGD by the BR-CORTE system