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.
This experiment was carried out to evaluate the performance and carcass characteristics of broilers fed diets with different lysine and threonine levels, in the final phase (42 to 56 days of age). Nine hundred and seventy two male chickens were randomly assigned to nine treatments on a fatorial 3×3 (three threonine levels; 0.70; 0.77 and 0.84% and three lysine levels; 0.94; 1.04 and 1.14%), with four replicates by treatment, of 27 birds each. Weight gain, feed intake, feed conversion, carcass yield and abdominal fat were studied. Performance and carcass yield were not affected by the treatments, but tended to improve as the addition levels of the studied amino acids increased.
Evaluation of the performance and carcass yield of broilers fed diets with different threonine and lysine levels, in the final phase
Barbosa,Maria José Baptista and Junqueira,Otto Mack and Andreotti,Marcelo de Oliveira and Cancherini,Luciana Cardoso and Araújo,Lúcio Francelino. Evaluation of the performance and carcass yield of broilers fed diets with different threonine and lysine levels, in the final phase. R. Bras. Zootec. [online]. 2001, vol.30, 5, [cited 2026-04-24], pp.1476-1480. Available from: <https://rbz.org.br/article/evaluation-of-the-performance-and-carcass-yield-of-broilers-fed-diets-with-different-threonine-and-lysine-levels-in-the-final-phase/>. ISSN 1516-3598. http://doi.org/10.1590/S1516-35982001000600014.
Barbosa,Maria José Baptista; Junqueira,Otto Mack; Andreotti,Marcelo de Oliveira; Cancherini,Luciana Cardoso; Araújo,Lúcio Francelino. Evaluation of the performance and carcass yield of broilers fed diets with different threonine and lysine levels, in the final phase. R. Bras. Zootec., v.30, 5, p. 1476-1480. Oct. 2001. Available from: <https://rbz.org.br/article/evaluation-of-the-performance-and-carcass-yield-of-broilers-fed-diets-with-different-threonine-and-lysine-levels-in-the-final-phase/>. acess on 24 Apr. 2026. http://doi.org/10.1590/S1516-35982001000600014.
Barbosa,Maria José Baptista, & Junqueira,Otto Mack, & Andreotti,Marcelo de Oliveira, & Cancherini,Luciana Cardoso, & Araújo,Lúcio Francelino. (2001). Evaluation of the performance and carcass yield of broilers fed diets with different threonine and lysine levels, in the final phase. R. Bras. Zootec., 30(5) , 1476-1480. http://doi.org/10.1590/S1516-35982001000600014.
BarbosaMaria José Baptista, JunqueiraOtto Mack, AndreottiMarcelo de Oliveira, CancheriniLuciana Cardoso, AraújoLúcio Francelino. Evaluation of the performance and carcass yield of broilers fed diets with different threonine and lysine levels, in the final phase. R. Bras. Zootec. [Internet]. 2001 Oct [cited 2026 Apr 24]; 30(5): 1476-1480. Available from: https://rbz.org.br/article/evaluation-of-the-performance-and-carcass-yield-of-broilers-fed-diets-with-different-threonine-and-lysine-levels-in-the-final-phase/. http://doi.org/10.1590/S1516-35982001000600014.
Figure 6
Differential abundance for the species Faecalibacterium prausnitzii (A) and Megamonas funiformis (B).
