Diferentes fontes de nitrogênio na alimentação de cabras leiteiras

• Ano de defesa: 2017
• Autor(a) principal: MACIEL, Laura Priscila Araújo Amaro
• Orientador(a): CARVALHO, Francisco Fernando Ramos de
• Banca de defesa: GUIM, Adriana, COSTA, Roberto Germano, LIMA JÚNIOR, Dorgival Morais de, BELO, Ana Maria Duarte Cabral
• Tipo de documento: Tese
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal Rural de Pernambuco
• Programa de Pós-Graduação: Programa de Pós-Graduação em Zootecnia
• Departamento: Departamento de Zootecnia
• País: Brasil
• Palavras-chave em Português: Nutrição animal; Nitrogênio; Caprino de leite; Caprino
• Área do conhecimento CNPq: CIENCIAS AGRARIAS::ZOOTECNIA
• Link de acesso: http://www.tede2.ufrpe.br:8080/tede2/handle/tede2/6956

The aim of to evaluate the nutritional value of the diets, the feeding behavior, the production characteristics and the physicochemical composition of the milk of goats fed with different nitrogen sources (soybean meal, cottonseed meal, cottonseed and urea). Twelve goats, AlpinaXSaanen, were used at 30 days of lactation, randomly distributed in three simultaneous 4x4 latin squares. The dry matter and nutrients consumption did not differ (P> 0.05), except for the consumption of ethereal extract that differed (P <0.05) among the treatments, being superior in the treatment containing cotton seed. Among the apparent digestibility coefficients, only the neutral detergent fiber showed a significant difference (P <0.05), being higher for the treatment containing cottonseed meal and lower for the treatment containing urea. The characteristics evaluated in the ingestive behavior were not affected (P> 0.05) in relation to the different nitrogen sources, except for the feed efficiency of the neutral detergent fiber, which showed a difference (P <0.05), with greater efficiency for the treatment containing cottonseed meal. Regarding milk production, somatic cell count, food efficiency, pH, temperature and density were not influenced by treatments (P >0.05). The percentage of fat, lactose (g / day) and lauric and stearic fatty acids were influenced by different nitrogen sources (P <0.05). Thus, it can be concluded that the nutritional value, production and composition of the milk of goats fed with different nitrogen sources were not negatively influenced by the diets. The diet containing cotton seed provided an increase in the amount of desirable fatty acids.