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/Jan/2012
Karina Ferreira Duarte, Otto Mack Junqueira, Rosemeire da Silva Filardi, Jefferson Costa de Siqueira, Edivaldo Antônio Garcia, Antonio Carlos de Laurentiz
DOI: 10.1590/S1516-35982012000100011
The objective of this experiment was to establish different criteria for evaluation of the requirements of digestible threonine for broilers from 22 to 42 d of age, using different regression models (quadratic, exponential, and Linear Response Plateau). A total of 1,920 22-day-old male Cobb broilers were distributed in randomized experimental design, with six treatments (six threonine levels: 0.5904, 0.6441, 0.6977, 0.7514, 0.8051, and 0.8588%) and 8 replications containing 40 broilers each one. The level of 0.6977% digestible threonine was used […]
Keywords: digestible amino acids; digestible threonine; ideal protein; performance; regression analyses
01/Dec/2007
Edilson Paes Saraiva, Rita Flávia Miranda de Oliveira, Juarez Lopes Donzele, Francisco Carlos de Oliveira Silva, Jefferson Costa de Siqueira, Maria Cristina Manno, [...]
DOI: 10.1590/S1516-35982007000800019
This study was carried out to evaluate the requirements of digestible threonine in diets of gilts from 15 to 30kg, maintained in thermoneutral environment. Seventy crossbreed gilts with an initial weight of 15.1 ± 0.4 kg were used in a randomized blocks design, with five treatments (levels of digestible threonine), seven replicates and two animals per experimental unity. The treatments corresponded to the levels of 0.54, 0.58, 0.61, 0.65, e 0.698% of digestible threonine. Digestible threonine levels in the diet […]
Keywords: digestible lysine ratio; digestible threonine; environmental temperature; performance
01/Dec/2007
Edilson Paes Saraiva, Rita Flávia Miranda de Oliveira, Juarez Lopes Donzele, Aloízio Soares Ferreira, Roberta Gomes Marçal Vieira Vaz, Will Pereira de Oliveira
DOI: 10.1590/S1516-35982007000800020
This study was carried out to evaluate the requirement of digestible threonine in diets of gilts from 30 to 60 kg, maintained thermoneutral environment. Seventy crossbreed gilts with an initial weight of de 30.0 ± 0.61 kg were used in a randomized blocks design, with five treatments (levels of digestible threonine), seven replicates and two animals per experimental unity. The treatments corresponded of the levels of 0.50; 0.53; 0.56; 0.60; and 0.63% of digestible threonine. No effect was observed of […]
Keywords: digestible threonine; environmental temperature; gilts; performance
01/Feb/1999
Rita da Trindade Ribeiro Nobre Soares, Luiz Fernando Teixeira Albino, Horácio Santiago Rostagno, Gardênia Holanda Cabral, Débora C. O Carvalho
DOI: 10.1590/S1516-35981999000100018
This experiment was carried out to determine the threonine requirement for broilers chicks from 1 to 21 days of age and to evaluate the effect of different threonine levels on the uric acid excretion in broilers. One thousand and two hundred broiler chicks were randomly allotted to a 6×2 factorial arrangement, being six levels of total threonine (.73, .77, .81, .85, .89, and .93%) and two sexes, with five replicates of 20 birds each. Feed intake, weight gain, feed:gain ratio […]
Keywords: amino acid; broiler; digestible threonine; uric acid