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.
01/Nov/2013
Tatiana Cristina da Rocha, Juarez Lopes Donzele, Paulo Cezar Gomes, Heloisa Helena de Carvalho Mello, Allan Reis Troni, Gabriel da Silva Viana
DOI: 10.1590/S1516-35982013001100003
Two hundred fifty-two Hy-Line W36 laying hens were allotted in a randomized block design with 6 treatments, 7 replicates and 6 hens per experimental unit in order to determine the ideal digestible isoleucine: digestible lysine (Ile:Lys) ratio for laying hens aged 24-40 weeks. Experimental diets contained 5.92, 6.33, 6.73, 7.14, 7.54 and 7.95 g/kg of digestible isoleucine, resulting in different Ile:Lys ratios (0.73:1, 0.78:1, 0.83:1, 0.88:1, 0.93:1 and 0.98:1). Experimental diets were isonitrogenous, with different dietary contents of glutamic acid, […]
Keywords: digestible amino acid; egg mass; egg production; protein
01/Dec/2000
José Humberto Vilar da Silva, Luiz Fernando Teixeira Albino, Horacio Santiago Rostagno, Paulo César Gomes, Ricardo Frederico Euclydes
DOI: 10.1590/S1516-35982000000600028
The objective of this work was to estimate the requirement of lysine from 13 to 20 weeks and to evaluate the posterior effect on the performance of two egg-type strains. Three hundred egg-white pullets from 13 to 20 weeks of age and three hundred egg-brown pullets from 13 to 20 weeks of age were allotted to a randomised block design with five treatments and four replicates. A basal diet with 14.0% of crude protein and 2900 kcal metabolizable energy/kg was […]
Keywords: amino acid; egg mass; egg production; growth