Cana-de-açúcar hidrolisada para vacas em lactação

• Ano de defesa: 2014
• Autor(a) principal: Sforcini, Mariana Paula Rossi [UNESP]
• Tipo de documento: Tese
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Estadual Paulista (Unesp)
• Palavras-chave em Português: Bovino de leite - Alimentação e rações; Cal; Leite - Produção; Leite - Composição; Nutrientes; Milk - Composition
• Link de acesso: http://hdl.handle.net/11449/113984

This study aimed to evaluate chemical composition, nutrient intake, in vitro digestibility, blood parameters, milk production, milk composition and partial economic evaluation of dairy cows fed diets with different proportions of sugarcane hydrolyzed with hydrated lime and corn silage. Eight Holstein cows, designed into two 4 x 4 Latin Squares with four periods of 19 days each, 14 days of adaptation and five days of data collection. The cows were fed with diets containing 100% hydrolyzed sugarcane (HS); 70% HS + 30% corn silage (CS); 50% HS + 50% CS; and 100% CS. The concentrate was supplied at the rate of 1 kg for every 2.5 kg of milk. The sugarcane used was IAC 862480 with 12 months of growth, particle size of 8 mm, hydrolyzed with 0.5% hydrated lime (≥ 95% calcium hydroxide) + 2,0 liters water + 100 kg chopped sugarcane, based on natural matter. Diets with hydrolyzed sugarcane as the only forage and diets with 70% HS + 30% CS decreased dry matter, crude protein and digestible nutrients intake. The lower in vitro neutral detergent fiber digestibility was 34.92% for the diet with 100% hydrolyzed sugarcane. Milk yield and 3.5% fat-corrected milk yield decreased linearly (P<0.05) as corn silage was being replaced hydrolyzed sugarcane in diets. The milk composition, the levels of glucose, total protein, total cholesterol and gamma-glutamyltransferase were not influenced by different proportions of hydrolyzed sugarcane in the diets (P>0.05). Diets with hydrolyzed sugarcane showed better cost-benefit. Although all proportios can be used, it’s recommended the combination of 50% of the corn silage and hydrolyzed sugarcane due to reach results closer to corn silage and reduce the cost of the kilogram of milk