Avaliação do consumo de pasto por bovinos de corte, estimados pelos indicadores externos:Óxido Crômico e LIPE®

• Ano de defesa: 2007
• Autor(a) principal: Joan Brálio Mendes Pereira Lima
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Minas Gerais; Brasil; VET - DEPARTAMENTO DE ZOOTECNIA; Programa de Pós-Graduação em Zootecnia; UFMG
• Palavras-chave em Português: Bovino de corte; Dieta em veterinária; Digestibilidade; Alimentação e rações; Nutrição Animal
• Link de acesso: http://hdl.handle.net/1843/32353

Six male and six female calves, seven months old, averaging 168,04 kg of liveweight (Lw) and 12 primiparous cows averaging 365,25 kg of liveweight, grazing Brachiaria decumbens, were used to compare the efficacy of two external markers: chromic oxide (Cr2O3) and purified and enriched lignin (LIPE®) dosed simultaneously once a day to predict dry matter intake (DMI). For both, Cr2O3 and LIPE®, there were no differences in DMI attributable to sex. However, for all parameters studied, when the comparisons were made between Cr2O3 and LIPE®, the estimates obtained with LIPE® were higher (p<0,05). For the calves, forage DMI (kg); total DMI (kg); DMI as percentage of Lw and DMI in relation to metabolic weight (g/kg Lw0,75) were 4,50 and 2,03; 5,18 and 2,71; 3,10 and 1,62; 111,32 and 58,10 for LIPE® and Cr2O3 respectively. For the cows, the values were 9,79 and 6,13; 2,71 and 1,70; 118,19 and 73,85 for total DMI (kg), DMI as percentage of Lw and DMI in relation to metabolic weight (g/kg Lw0,75). These results suggest that estimates derived from LIPE® gave a better fit with the dry matter requirements of the animals.