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/Dec/2000
Altivo José de Castro, Paulo Cezar Gomes, Júlio Maria Ribeiro Pupa, Horacio Santiago Rostagno, Luiz Fernando Teixeira Albino, Adriana Helena Nascimento
DOI: 10.1590/S1516-35982000000600021
With the objective to determine the tryptophan nutritional requirements for male and female broilers, during the initial phase, 800 male and female chicks, from 1 to 21 days of age, with average initial weight of 44.7 and 44.6 g, respectively, were used. The birds received a deficient tryptophan basal diet (.180%). A completely randomized blocks experimental design, in a 5 x 2 factorial arrangement (treatment x sex), with four replicates per sex and 20 chicks per experimental unit, was used. […]
Keywords: amino acid; broiler; requirement; tryptophan