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.
Robson Magno Liberal Véras, Sebastião de Campos Valadares Filho, Rilene Ferreira Diniz Valadares, Luciana Navajas Rennó, Pedro Veiga Rodrigues Paulino, Marjorrie Augusto de Souza
01/Aug/2007
Robson Magno Liberal Véras, Sebastião de Campos Valadares Filho, Rilene Ferreira Diniz Valadares, Luciana Navajas Rennó, Pedro Veiga Rodrigues Paulino, Marjorrie Augusto de Souza
DOI: 10.1590/S1516-35982007000500030
The objective of this trial was to investigate the effects of increasing dietary crude protein levels on N balance and metabolizable protein requirements for maintenance in Nellore heifers, bulls and steers averaging 16 months of age and body weight of 254.8, 285.1, and 265.6 kg, respectively. Animals were blocked by sexual category (heifers, bulls and steers) and randomly assigned to treatments in three replicated 4 x 4 Latin squares. Diets contained the following CP levels: 7, 10, 13, and 15%. […]
Keywords: bull; heifer; protein requirements; steer
01/Jun/2002
Carlos Bôa-Viagem Rabello, Nilva Kazue Sakomura, Flavio Alves Longo, Otto Mack Junqueira, Carlos Roberto Pacheco
DOI: 10.1590/S1516-35982002000500016
The objective of this study was to evaluated a crude protein requirement equation elaborated for broiler breeders. The experiment was conducted with 600 31-weeks old Hubbard HI-Y broiler breeders in a completely randomized experiment with three treatments and five replications. The treatments were: T1- Crude protein supply according to lineage recommendation manual (control), T2 ¾ Crude protein supply according to a prediction equation adjusted in function of the performance data of the standard treatment, and T3 ¾ Crude protein supply […]
Keywords: broiler breeders; prediction equation; protein requirements