Desempenho de vacas em lactação em dietas à base de silagem de milho ou cana-de-açúcar in natura ou ensilada

• Ano de defesa: 2013
• Autor(a) principal: Vergara, Rafael Alberto Vergara
• Orientador(a): Marcondes, Marcos Inácio
• Banca de defesa: Valadares, Rilene Ferreira Diniz
• 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: Plantarum; Propionici; Bactéria
• Palavras-chave em Inglês: Plantarum; Propionici; Bacteria
• Área do conhecimento CNPq: CNPQ::CIENCIAS AGRARIAS::ZOOTECNIA
• Link de acesso: http://locus.ufv.br/handle/123456789/5799

This study was conducted to evaluate the use of sugarcane silage or traditional forage sources (corn silage or fresh sugarcane) on intake and milk production of Holstein cows. Twenty five Holstein cows were used, with an average initial body weight of 600 kg, the trial was implemented as a randomized block design with 5 blocks, 5 experimental periods lasting 14 days and 5 treatments each, in a repeated measurements scheme. The treatments were given corn silage (SM), fresh sugarcane, unadulterated sugarcane silage, sugarcane silage with Lactobacillus plantarum and Pediococcus pentosaceus (2.5 × 1010 CFU / g forage) and sugarcane silage with Propionibacterium acidipropionici + sucrase + cellulase (5 × 109 CFU / g of forage). The forage:concentrate ratio was 60:40, in the dry matter (DM) basis, for treatment based on corn silage and 40:60 for the treatments based on sugarcane. Similarities regarding consumption of (kg / day) of DM, organic matter (OM) was observed among SM and sugarcane treatments. A lower consumption (kg / day) of crude protein (CP), non fibrous carbohydrates (NFC) and total digestible nutrients (TDN) and lower digestibility of DM, OM, CP , NFC and TDN for corn silage treatment compared to the other sugarcane based diets. The production of milk, protein, fat, lactose, dry nonfat extract were similar among all treatments. However, it was observed that milk production based on pure sugarcane was higher compared to treatments based on sugarcane silage. The average daily gain (ADG) was similar among treatments based on SM compared with treatments based on sugarcane. It is concluded that diets based on sugarcane silage with forage:concentrate ratio of 40:60 in DM, provide milk production of up to 20 kg/day and an ADG of up to 650 g/day.