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.
A completely randomized experimental design was carried out to evaluate the crude protein reduction of diets and essential amino acids supplementation effects on performance and body composition of male broiler chickens from one to 21 days of age. A total of seven hundred and twenty broiler chickens were used. Birds were alloted in four treatments and six replicates of thirty birds each. The diets crude protein (CP) levels were 230, 210, 190 and 170 g/kg. There was decreasing linear effect of the CP levels on feed:gain ratio, weight gain, the final weight and feed intake. Carcass fat and carcass dry matter increased linearly with protein reduction.
Reduction of dietary protein on performance and carcass of broiler chickens from 1 to 21 days of age
Vasconcellos,Carlos Henrique de Figueiredo and Fontes,Dalton de Oliveira and Corrêa,Gerusa da Silva Salles and Vidal,Tatiana Zacché Batista and Silva,Martinho de Almeida e and Machado,André Luiz Costa and Fernandes,Isabela Sabino and Vieites,Flávio Medeiros. Reduction of dietary protein on performance and carcass of broiler chickens from 1 to 21 days of age. R. Bras. Zootec. [online]. 2012, vol.41, 3, [cited 2026-04-24], pp.662-667. Available from: <https://rbz.org.br/article/reduction-of-dietary-protein-on-performance-and-carcass-of-broiler-chickens-from-1-to-21-days-of-age/>. ISSN 1516-3598. https://doi.org/10.1590/S1516-35982012000300028.
Vasconcellos,Carlos Henrique de Figueiredo; Fontes,Dalton de Oliveira; Corrêa,Gerusa da Silva Salles; Vidal,Tatiana Zacché Batista; Silva,Martinho de Almeida e; Machado,André Luiz Costa; Fernandes,Isabela Sabino; Vieites,Flávio Medeiros. Reduction of dietary protein on performance and carcass of broiler chickens from 1 to 21 days of age. R. Bras. Zootec., v.41, 3, p. 662-667. Mar. 2012. Available from: <https://rbz.org.br/article/reduction-of-dietary-protein-on-performance-and-carcass-of-broiler-chickens-from-1-to-21-days-of-age/>. acess on 24 Apr. 2026. https://doi.org/10.1590/S1516-35982012000300028.
Vasconcellos,Carlos Henrique de Figueiredo, & Fontes,Dalton de Oliveira, & Corrêa,Gerusa da Silva Salles, & Vidal,Tatiana Zacché Batista, & Silva,Martinho de Almeida e, & Machado,André Luiz Costa, & Fernandes,Isabela Sabino, & Vieites,Flávio Medeiros. (2012). Reduction of dietary protein on performance and carcass of broiler chickens from 1 to 21 days of age. R. Bras. Zootec., 41(3) , 662-667. https://doi.org/10.1590/S1516-35982012000300028.
VasconcellosCarlos Henrique de Figueiredo, FontesDalton de Oliveira, CorrêaGerusa da Silva Salles, VidalTatiana Zacché Batista, SilvaMartinho de Almeida e, MachadoAndré Luiz Costa, FernandesIsabela Sabino, VieitesFlávio Medeiros. Reduction of dietary protein on performance and carcass of broiler chickens from 1 to 21 days of age. R. Bras. Zootec. [Internet]. 2012 Mar [cited 2026 Apr 24]; 41(3): 662-667. Available from: https://rbz.org.br/article/reduction-of-dietary-protein-on-performance-and-carcass-of-broiler-chickens-from-1-to-21-days-of-age/. https://doi.org/10.1590/S1516-35982012000300028.
Figure 6
Differential abundance for the species Faecalibacterium prausnitzii (A) and Megamonas funiformis (B).
