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Carcass and meat traits of feedlot Nellore bulls fed different dietary energy sources R. Bras. Zootec.
Maia Filho,Geraldo Helber Batista; Barbosa,Fabiano Alvim; Emerick,Lucas Luz; Souza,Rafahel Carvalho; Figueiredo,Tadeu Chaves; Azevedo,Henrique de Oliveira; Cavalcanti,Luigi Francis Lima; Mandarino,Raphael Amazonas.
ABSTRACT The objective of this experimental study was to evaluate the effects of different dietary energy sources on the carcass and meat traits of feedlot Nellore bulls. A total of 48 Nellore bulls at 32 months of age with 354.35±19.56 kg body weight were studied for 85 days. The bulls were allotted to four groups of 12 individuals: Whole corn grain - diet based on whole corn grain; Ground corn - diet based on ground corn grain; Citrus pulp - diet based on citrus pulp; and Steam-flaked corn - diet based on steam-flaked corn. Diets did not influence carcass quality or meat quality. Average values for fat depth, rib eye area, shear force, total cooking losses, and carcass yield were 4.97 mm, 74.71 cm2, 5.85 kgf, 26.82%, and 52.0%, respectively. Based on the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Fat; High-concentrate diets; Intake; Rib eye area; Tenderness.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982016000500265
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Economic analysis, performance, and feed efficiency in feedlot lambs R. Bras. Zootec.
Lima,Natália Ludmila Lins; Ribeiro,Carolina Resende de Freitas; Sá,Hemilly Cristina Menezes de; Leopoldino-Júnior,Izac; Cavalcanti,Luigi Francis Lima; Santana,Ronan Aparecido Valadares; Furusho-Garcia,Iraides Ferreira; Pereira,Idalmo Garcia.
ABSTRACT The objective of this study was to evaluate residual feed intake (RFI), residual intake and body weight gain (RIG) and their relationship with other traits of efficiency, performance, and economic analysis of sheep. Lambs (n = 102) were evaluated during 56 days and a herd consisting of 500 ewes was simulated with the mean of dry matter intake (DMI) and final body weight of the lambs, the same as that of the experimental lambs. The lambs were fed hay-based diet of Tifton 85 (Cynodon spp.), corn, and soybean in the voluminous:concentrate ratio of 35:65. Residual feed intake and RIG were correlated with DMI, feed conversion ratio, and feed efficiency. Residual intake and body weight gain were positively correlated with average daily gain, relative...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Cost; Profit; Revenue; RFI; RIG; Sheep.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982017001000821
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Models of protein and amino acid requirements for cattle R. Bras. Zootec.
Tedeschi,Luis Orlindo; Fox,Danny Gene; Fonseca,Mozart Alves; Cavalcanti,Luigi Francis Lima.
Protein supply and requirements by ruminants have been studied for more than a century. These studies led to the accumulation of lots of scientific information about digestion and metabolism of protein by ruminants as well as the characterization of the dietary protein in order to maximize animal performance. During the 1980s and 1990s, when computers became more accessible and powerful, scientists began to conceptualize and develop mathematical nutrition models, and to program them into computers to assist with ration balancing and formulation for domesticated ruminants, specifically dairy and beef cattle. The most commonly known nutrition models developed during this period were the National Research Council (NRC) in the United States, Agricultural...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Modeling; Nutrition; Prediction; Ruminants; Simulation.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982015000300109
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