Cana-de-açúcar in natura ou armazenada, corrigida com uréia na alimentação de bovinos leiteiros em crescimento

• Ano de defesa: 2009
• Autor(a) principal: Vidaurre, Monique Bareli
• Orientador(a): Campos, José Maurício de Souza
• Banca de defesa: Lana, Rogério de Paula , Oliveira, André Soares de
• 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: Alimentação de fêmeas leiteiras; Desempenho de fêmeas leiteiras
• Palavras-chave em Inglês: Feeding female animals dairy; Performance of dairy female animals
• Área do conhecimento CNPq: CNPQ::CIENCIAS AGRARIAS::ZOOTECNIA::NUTRICAO E ALIMENTACAO ANIMAL
• Link de acesso: http://locus.ufv.br/handle/123456789/5666

Appraised the effect of different levels of urea at the sugar cane (0,0; 0,6 e 1,2% as is bases) and two times of storage of the sugar cane (0 ou 24 horas) over the consumption, digestibility of the diet and the productive performance on the growing cattle. Beside that, searched compare the digestibility obtained at the second experimental period (29 to 56º) compared with the average value obtained at the 1º+2º+3º experimental periods, to discover if the data obtained just with the 2º period represents the data obtained with the three periods and if it is possible to have a relation with the consumption of concentrate estimated by the offer and the consumption of concentrate estimated by the supply of dioxide of titanium. Twenty four purebred and crossbred Holstein male and female animals were used in this trial, with medium initial body weight of 221,5kg, housed in individual pens, allotted into a 2 x 3 factorial (sex) arrangement in a randomized block design. Diets were isonitrogenous, with 14% crude protein, based on dry matter (DM). Were supplied 3,0kg of concentrate per animal each day, which was supplied at will, allowing surpluses until 10% of dry matter. The sugar cane presented 21,7º Brix. The duration of the experiment was of 105 days, divided in three periods with 28 days each, after 21 days of adaptation. It did not has an interaction with the levels of urea on the sugar cane and the time of storage. It had a linear augment (P<0,05) on the consumption of dry matter and, therefore, of the other components of the diet with the raising of the urea levels, as well as on the concentration of Plasma urea nirogen and decrease (P<0,05) at the consumption with the storage time. It had a linear reduction (P<0,05) on the digestibility of the evaluated components (except PB and EE) with the raising of the levels of urea on the sugar cane, but it did not has the effect of the storage time at the digestibility. It did not has difference between the digestibility obtained at the second period, compared with the medium digestibility of the first, second and third periods. No difference was detected (P<0.05) among the treatments on average daily gain, shoulder height, hip height, chest width and hip width. The use of stored sugar cane for 24 hours, can be utilized for the consumption of growing cattle. For sugar-cane with Brix grade of 21,7, it s possible to correct its protein content using until 1.2% of the urea :ammonium sulfate mixture, is bases, without jeopardizing the animal s average daily gain, which may contribute economically to the animal production. To growing cattle, the digestibility can be measure just on the second period, representing the other experiment periods.