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.
The objective of this study was to evaluate the reduction of protein, the formulation of diets and supplementation of an enzyme complex for laying hens. The layers were distributed in a completely randomized 2 × 2 × 2 factorial arrangement, with two levels of crude protein reduction (0.0 and 4.0 g/kg), two kinds of diet formulation (without and with reformulation, considering 75 kcal of metabolizable energy) and two enzyme supplementations (without and with enzyme complex supplementation), totalizing 8 treatments of 8 layers each, with 7 replications, in a total of 448 laying hens at 30 weeks of age. After data analysis, it was found that the enzyme complex supplementation in the diet of layers improves performance, promotes a similar egg quality and improves the bone and intestinal health of the layers.
Nutritional reduction of protein and usage of enzyme in the diet of light layers
Lima,Matheus Ramalho de and Costa,Fernando Guilherme Perazzo and Goulart,Cláudia de Castro and Pinheiro,Sarah Gomes and Souza,Rafael Barbosa de and Morais,Sérgio Antonio de Normando and Lima,Raffaella Castro. Nutritional reduction of protein and usage of enzyme in the diet of light layers. R. Bras. Zootec. [online]. 2012, vol.41, 9, [cited 2026-04-23], pp.2055-2063. Available from: <https://rbz.org.br/article/nutritional-reduction-of-protein-and-usage-of-enzyme-in-the-diet-of-light-layers/>. ISSN 1516-3598. https://doi.org/10.1590/S1516-35982012000900013.
Lima,Matheus Ramalho de; Costa,Fernando Guilherme Perazzo; Goulart,Cláudia de Castro; Pinheiro,Sarah Gomes; Souza,Rafael Barbosa de; Morais,Sérgio Antonio de Normando; Lima,Raffaella Castro. Nutritional reduction of protein and usage of enzyme in the diet of light layers. R. Bras. Zootec., v.41, 9, p. 2055-2063. Sep. 2012. Available from: <https://rbz.org.br/article/nutritional-reduction-of-protein-and-usage-of-enzyme-in-the-diet-of-light-layers/>. acess on 23 Apr. 2026. https://doi.org/10.1590/S1516-35982012000900013.
Lima,Matheus Ramalho de, & Costa,Fernando Guilherme Perazzo, & Goulart,Cláudia de Castro, & Pinheiro,Sarah Gomes, & Souza,Rafael Barbosa de, & Morais,Sérgio Antonio de Normando, & Lima,Raffaella Castro. (2012). Nutritional reduction of protein and usage of enzyme in the diet of light layers. R. Bras. Zootec., 41(9) , 2055-2063. https://doi.org/10.1590/S1516-35982012000900013.
LimaMatheus Ramalho de, CostaFernando Guilherme Perazzo, GoulartCláudia de Castro, PinheiroSarah Gomes, SouzaRafael Barbosa de, MoraisSérgio Antonio de Normando, LimaRaffaella Castro. Nutritional reduction of protein and usage of enzyme in the diet of light layers. R. Bras. Zootec. [Internet]. 2012 Sep [cited 2026 Apr 23]; 41(9): 2055-2063. Available from: https://rbz.org.br/article/nutritional-reduction-of-protein-and-usage-of-enzyme-in-the-diet-of-light-layers/. https://doi.org/10.1590/S1516-35982012000900013.
Figure 6
Differential abundance for the species Faecalibacterium prausnitzii (A) and Megamonas funiformis (B).
