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/Sep/2009
Tatiana Cristina da Rocha, Paulo Cezar Gomes, Juarez Lopes Donzele, Sergio Luiz de Toledo Barreto, Heloisa Helena de Carvalho Mello, Gladstone Brumano
DOI: 10.1590/S1516-35982009000900012
The objective of this study wast to determine the requirement of digestible lysine for light-weight laying hens 24 to 40 weeks of age. Two hundred and sixteen Hy-Line W36 light-weight laying hens were allotted to a randomized complete blocks with six treatments, six blocks and six hens per experimental unit. The treatments consisted of a basal diet, with 14.54% crude protein, deficient in digestible lysine (0.545%), supplemented with six levels of L-lysine HCl (78%) 0.00; 0.059; 0.118; 0.177; 0.237 and […]
Keywords: amino acids; eggs production; nutritional requirements
01/Apr/2008
Fernando Guilherme Perazzo Costa, Cleber Franklin Santos de Oliveira, Leilane Rocha Barros Dourado, Raul da Cunha Lima Neto, Miguel Ângelo da Silva Fernandes Campos, Anny Graycy Vasconcelos de Oliveira Lima
DOI: 10.1590/S1516-35982008000400006
Two hundred and sixteen layers were raised from 39 to 55 weeks of age to study the effects of levels of calcium in the rations on performance and eggs quality of brown commercial layers. A completely randomized experimental design were used with six levels of calcium (3.0; 3.4; 3.8; 4.2; 4.6 and 5.0%) and six replicates of six layers hens. There was no effect of calcium levels on hen performance, however significantly affected the percentage of albumen and egg shell. […]
Keywords: egg shell quality; eggs production; requirements
01/Oct/2003
Rogério Pinto, Aloízio Soares Ferreira, Juarez Lopes Donzele, Martinho de Almeida e Silva, Rita da Trindade Ribeiro Nobre Soares, Gislene Santos Custódio, [...]
DOI: 10.1590/S1516-35982003000500019
Three hundred 49-days old Japanese female quails, averaging 138.0g, were used to estimate the requirement of digestible lysine level for Japanese quail in completely randomized block design with five replicates of ten females per experimental unit. The treatment consisted six levels of digestible lysine (0.80, 0.90, 1.00, 1.10, 1.20 and 1.30%) and the analyzed traits were rate of egg production (%), egg weight (g), egg mass (g of eggs/quail/day), feed intake (g), feed consumption: weight gain ratio (g of diet/g […]
Keywords: amino acid; bone tissue; digestibility; eggs production; ideal protein; laying quail