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	Provedor de dados R. Bras. Zootec. (2) Autor Botelho,Mosar Faria (2) Henrique,Douglas Sampaio (2) Vieira,Ricardo Augusto Mendonça (2) Fontes,Carlos Augusto de Alencar (1) Lana,Rogério de Paula (1) Queiroz,César de (1) Mais... Palavra-chave Beef-cattle (1) Bioenergetics (1) Mathematical models (1) Modeling (1) Nutrition (1) Ruminants (1) Mais... Tipo do documento Info:eu-repo/semantics/article (2) Ano 2011 (1) 2009 (1) País Brazil (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última A model for evaluating beef cattle rations considering effects of ruminal fiber mass R. Bras. Zootec. Henrique,Douglas Sampaio; Lana,Rogério de Paula; Vieira,Ricardo Augusto Mendonça; Fontes,Carlos Augusto de Alencar; Botelho,Mosar Faria. A mathematical model based on Cornell Net Carbohydrate and Protein System (CNCPS) was developed and adapted in order to evaluate beef cattle rations at tropical climate conditions. The presented system differs from CNCPS in the modeling of insoluble particles' digestion and passage kinetics, which enabled the estimation of fiber mass in rumen and its effects on animal performance. The equations used to estimate metabolizable protein and net energy requirements for gain, net energy requirement for maintenance and total efficiency of metabolizable energy utilization were obtained from scientific articles published in Brazil. The parameters of the regression equations in these papers were estimated using data from Bos indicus purebred and crossbred animals... Tipo: Info:eu-repo/semantics/article Palavras-chave: Modeling; Nutrition; Ruminants. Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982011001100036 Energetic efficiency of protein and body fat retention in crossbred Bos indicus and Bos Taurus × Bos indicus raised under tropical conditions R. Bras. Zootec. Henrique,Douglas Sampaio; Queiroz,César de; Vieira,Ricardo Augusto Mendonça; Botelho,Mosar Faria. The efficiency of fat and protein retention by Bos indicus and its cross-breds was estimated from data obtained in the literature to verify possible differences between these animals and Bos taurus. After estimating the efficiencies, a correction factor was used to discount the metabolizable energy fraction that was spent in the maintenance and support metabolism processes. The efficiencies were then estimated again, assuming that all the remaining energy would correspond to the metabolizable energy available for body mass retention. The correction value used was considered satisfactory to discount energetic losses for maintenance and support. The efficiency values of partial body fat and protein retention in Bos indicus and its cross-bred were very... Tipo: Info:eu-repo/semantics/article Palavras-chave: Beef-cattle; Bioenergetics; Mathematical models. Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982009000800024 Registros recuperados: 2 Primeira ... 1 ... Última

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