Desempenho de novilhas leiteiras alimentadas com diferentes volumosos

• Ano de defesa: 2013
• Autor(a) principal: Burgos, Eusebio Manuel Galindo
• Orientador(a): Marcondes, Marcos Inácio
• Banca de defesa: Pereira, Luiz Gustavo Ribeiro
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Viçosa
• Programa de Pós-Graduação: Mestrado em Zootecnia
• Departamento: Genética e Melhoramento de Animais Domésticos; Nutrição e Alimentação Animal; Pastagens e Forragicul
• País: BR
• Palavras-chave em Português: Desempenho; Novilhas leiteiras; Silagem de sorgo; Silagem de cana-de-açúcar; Cana de açúcar in natura; Silagem de milho
• Palavras-chave em Inglês: Performance; Dairy heifers; Sorghum silage; Sugar cane silage; Sugar cane in nature; Corn silage
• Área do conhecimento CNPq: CNPQ::CIENCIAS AGRARIAS::ZOOTECNIA::NUTRICAO E ALIMENTACAO ANIMAL::AVALIACAO DE ALIMENTOS PARA ANIMAIS
• Link de acesso: http://locus.ufv.br/handle/123456789/5790

This study aimed to evaluate the effects of different forages on intake, digestibility and performance of dairy heifers. Sixteen dairy heifers were used, and they had initial body weight of 150 ± 19 kg and 8 mo. The animals were divided into a randomized block design with four replications, where each animal was used as experimental unit and blocks formed in accordance with the initial body weight of the animals. They were fed for 70 days. Four sources of roughage were used: corn silage (CS), sorghum silage (SS), sugar cane in nature (SC) sugar cane silage (SCS). The amounts of concentrate were fixed at 0.5% of body weight (BW) for CS and SS, 0.7% BW for SC, and 1.0% BW for SSC. The animals fed diets based on CS and SS had higher average daily gain than those fed with diets containing SC and SCS. Intake and digestibility of dry matter (DM), organic matter (OM) and metabolizable energy (ME) were higher for heifers fed CS and SS. There were differences in intake and digestibility of crude protein (CP) and neutral detergent fiber (NDF) for heifers fed SS. For non-fiber carbohydrates (NFC), there were greater intake and digestibility in heifers fed on CS. There were no diet effect for withers height and body length. There was an effect of CS and SS for chest girth. It is concluded that diets based on corn silage and sorghum silage offer higher performance than diets based on sugar cane in nature or sugar cane silage for dairy heifers.