The Revista Brasileira de Zootecnia (RBZ) is a publication dedicated to the broad field of Animal Science. We publish high-quality, original scientific research that spans across diverse areas within the discipline. The scope of RBZ encompasses a wide range of topics, including aquaculture, biometeorology and animal welfare, forage crops and grasslands, animal and forage plants breeding and genetics, animal reproduction, ruminant and non-ruminant nutrition, meat science and muscle biology, precision livestock, and animal production systems and agribusiness.
The Revista Brasileira de Zootecnia (RBZ) is a publication dedicated to the broad field of Animal Science. We publish high-quality, original scientific research that spans across diverse areas within the discipline. The scope of RBZ encompasses a wide range of topics, including aquaculture, biometeorology and animal welfare, forage crops and grasslands, animal and forage plants breeding and genetics, animal reproduction, ruminant and non-ruminant nutrition, meat science and muscle biology, precision livestock, and animal production systems and agribusiness.
The Revista Brasileira de Zootecnia (RBZ) is a publication dedicated to the broad field of Animal Science. We publish high-quality, original scientific research that spans across diverse areas within the discipline. The scope of RBZ encompasses a wide range of topics, including aquaculture, biometeorology and animal welfare, forage crops and grasslands, animal and forage plants breeding and genetics, animal reproduction, ruminant and non-ruminant nutrition, meat science and muscle biology, precision livestock, and animal production systems and agribusiness.
Marcelo de Andrade Ferreira, Renata Rodrigues da Silva, Alenice Ozino Ramos, Antonia Sherlânea Chaves Véras, Airon Aparecido Silva de Melo, Amanda Vasconcelos Guimarães
01/Jan/2009
Marcelo de Andrade Ferreira, Renata Rodrigues da Silva, Alenice Ozino Ramos, Antonia Sherlânea Chaves Véras, Airon Aparecido Silva de Melo, Amanda Vasconcelos Guimarães
DOI: 10.1590/S1516-35982009000100020
Five Holstein cows were allotted to a 5 × 5 Latin square design with the objective of evaluating the microbial protein production, using the total excretion of purine derivatives (PD), obtained from spot urine collection, plasma and milk urea and nitrogen (N)-urea. The five treatments contained different forage sources: sugar cane bagasse (CB), tifton hay (TH), elephant grass hay (EH), sorghum silage (SS) and a mixture of sugar cane bagasse + sorghum silage (CBSS). The milk urea (10.98 mg/dL) and […]
Keywords: creatinine; purine derivatives; semi-arid; spot sample
Mario Luiz Chizzotti, Sebastião de Campos Valadares Filho, Rilene Ferreira Diniz Valadares, Fernanda Helena Martins Chizzotti, José Maurício de Souza Campos, Marcos Inácio Marcondes, [...]
01/Aug/2006
Mario Luiz Chizzotti, Sebastião de Campos Valadares Filho, Rilene Ferreira Diniz Valadares, Fernanda Helena Martins Chizzotti, José Maurício de Souza Campos, Marcos Inácio Marcondes, [...]
DOI: 10.1590/S1516-35982006000600032
The objective of this trial was to evaluate the effect of body weight (BW) of heifers on intake, apparent digestibility of nutrients, microbial protein synthesis, ruminal metabolism, and urinary excretion of nitrogenous compounds. The spot urine sampling and the total collection of urine techniques were used to estimate microbial N flow. Twenty-two heifers with different body weights (523, 453, 315, 235 and 118 kg) were used in a completely randomized design and assigned to the following treatments: BW523, BW453, BW315, […]
Keywords: Holstein; microbial protein; NDFap; serum urea nitrogen; spot sample