Revista Brasileira de Zootecnia

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.

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Revista Brasileira de Zootecnia

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.

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Revista Brasileira de Zootecnia

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.

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Volume 43, Issue 10, 2014

Effect of seminal plasma and egg yolk concentration on freezability of goat semen

Valéria da Silva Ferreira, Marco Roberto Bourg de Mello, Carlos Elysio Moreira da Fonseca, Állan César Ferreira Dias, Jéssica Machado Cardoso, Rebecca Barbosa Silva, [...]

01/Oct/2014

Effect of seminal plasma and egg yolk concentration on freezability of goat semen

Valéria da Silva Ferreira, Marco Roberto Bourg de Mello, Carlos Elysio Moreira da Fonseca, Állan César Ferreira Dias, Jéssica Machado Cardoso, Rebecca Barbosa Silva, [...]

DOI: 10.1590/S1516-35982014001000001

The objective of this study was to evaluate the effects of egg yolk and seminal plasma on the viability of cryopreserved goat semen. To this end, four fertile Saanen bucks, aged between 10 months and 1 year, and weighing 18 to 25 kg, were used. Semen was collected from each buck by the artificial vagina method at the end of breeding season (June-July). The extender used was the yolk citrate, which was split into two equal aliquots: 5% egg yolk […]

Keywords: buck; centrifugation; extender

More

Rumen degradation and passage kinetics of silage made from different corn hybrids

Karoline Guedes Araújo, Severino Delmar Junqueira Villela, Fernando de Paula Leonel, Wagner Pessanha Tamy, Raphael dos Santos Gomes, Matheus Lima Corrêa Abreu

01/Oct/2014

Rumen degradation and passage kinetics of silage made from different corn hybrids

Karoline Guedes Araújo, Severino Delmar Junqueira Villela, Fernando de Paula Leonel, Wagner Pessanha Tamy, Raphael dos Santos Gomes, Matheus Lima Corrêa Abreu

DOI: 10.1590/S1516-35982014001000002

The objective of the present study was to evaluate the parameters related to the digestion of the fiber from silages of four corn hybrids (BX1280, SHS4070, 2B433, and DKB390) developed for silage production. Four rumen-cannulated castrated Holstein × Zebu crossbred cattle with approximate initial weight of 400 kg were distributed in a Latin square design. To determine the fiber passage rate and degradability, the techniques of chromium-mordant and in situ incubation of the neutral detergent fiber of the silages in […]

Keywords: fiber; passage rate; ruminal degradability

More

Factors affecting feed efficiency in dairy goats

Tadeu Silva de Oliveira, Fernando de Paula Leonel, Cássio José da Silva, Danielle Ferreira Baffa, José Carlos Pereira, Joanis Tilemahos Zervoudakis

01/Oct/2014

Factors affecting feed efficiency in dairy goats

Tadeu Silva de Oliveira, Fernando de Paula Leonel, Cássio José da Silva, Danielle Ferreira Baffa, José Carlos Pereira, Joanis Tilemahos Zervoudakis

DOI: 10.1590/S1516-35982014001000003

The objective of this study was to present some factors affecting feed efficiency in dairy goats. To develop our work, individual and average data from performance experiments with lactating goats were used. The following variables were evaluated: gross feed efficiency, adjusted feed efficiency, dry matter intake, milk-yield, 3.5% fat-corrected milk yield, dry matter digestibility, dietary neutral detergent fiber content, different roughage-to-concentrate ratios and body weight. The statistical analyses involved the application of descriptive and dispersion measures besides Pearson’s correlation coefficient […]

Keywords: dry matter intake; goat; milk yield

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Forage cactus associated with different fiber sources for lactating Sindhi cows: intake, digestibility and microbial protein production

Carla Aparecida Soares Saraiva, Severino Gonzaga Neto, Maria Fernanda Soares Queiroz, Lara Toledo Henriques, Edilson Paes Saraiva, Rômulo Pontes de Freitas Albuquerque, [...]

01/Oct/2014

Forage cactus associated with different fiber sources for lactating Sindhi cows: intake, digestibility and microbial protein production

Carla Aparecida Soares Saraiva, Severino Gonzaga Neto, Maria Fernanda Soares Queiroz, Lara Toledo Henriques, Edilson Paes Saraiva, Rômulo Pontes de Freitas Albuquerque, [...]

DOI: 10.1590/S1516-35982014001000004

This experiment was carried to evaluate the effect of forage cactus with different fiber sources (elephant grass hay [EGH], corn straw [CS], hay of cassava shoots [HCS], fresh sugarcane bagasse [FSB], and hydrolyzed sugarcane bagasse [HSB]) on intake, apparent digestibility and macrobiotic protein production of cows. Five cows with 265 kg average body weight, 4.95 kg average daily milk yield and 5.22 kg 4% fat-corrected milk yield were randomly allocated to a 5 × 5 Latin square design. The animals […]

Keywords: Nopalea cochenillifera; purine derivatives; roughage; zebu

More

Sulfur sources in protein supplements for ruminants

Cássio José da Silva, Fernando de Paula Leonel, José Carlos Pereira, Marcone Geraldo Costa, Leonardo Marmo Moreira, Tadeu Silva de Oliveira, [...]

01/Oct/2014

Sulfur sources in protein supplements for ruminants

Cássio José da Silva, Fernando de Paula Leonel, José Carlos Pereira, Marcone Geraldo Costa, Leonardo Marmo Moreira, Tadeu Silva de Oliveira, [...]

DOI: 10.1590/S1516-35982014001000005

The present study evaluates the efficiency of different sulfur sources for ruminant nutrition. The fiber digestibility and the amino acid profile were analyzed in the duodenal digesta of crossbred steers fed Brachiaria dictyoneurahay. The sources utilized were elemental sulfur (ES70S), elemental sulfur (ES98S); calcium sulfate in hydrated (HCS), CaSO4.2H2O, and anhydrous (ACS), CaSO4, forms; and ammonium sulfate (AS), (NH4)2SO4, keeping a nitrogen:sulfur ratio of 11:1. The iso-protein supplements had 50% of protein in the total dry matter (DM). Five Holstein […]

Keywords: in vitro microbial growth; sources of sulfur; sulfur-containing amino acids

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Concentrate supplementation during pregnancy and lactation of ewes affects the growth rate of lambs from a variety of crosses

Jacira Neves da Costa Torreão, Arturene Marques Rocha, Carlo Aldrovandi Torreão Marques, Leilson Rocha Bezerra, Fernanda Patrícia Gottardi, Marcos Jácome de Araújo, [...]

01/Oct/2014

Concentrate supplementation during pregnancy and lactation of ewes affects the growth rate of lambs from a variety of crosses

Jacira Neves da Costa Torreão, Arturene Marques Rocha, Carlo Aldrovandi Torreão Marques, Leilson Rocha Bezerra, Fernanda Patrícia Gottardi, Marcos Jácome de Araújo, [...]

DOI: 10.1590/S1516-35982014001000006

The objective of this study was to determine how concentrate supplementation during late third gestation and lactation affects ewe and offspring performance from birth to weaning. Thirty-six ewes and their offspring (n = 32) were used. Eighteen Morada Nova and 18 Santa Inês ewes were artificially inseminated with semen from Dorper ram and distributed in a completely randomized factorial arrangement (2 × 2) consisting of two supplementation levels (5 and 15 g kg-1 of BW) and two breeds (Morada Nova […]

Keywords: crossbreeding; feed evaluation; performance

More

Live weight and metabolic hormone profile in steers moved in drives

Marcella Cândia D'Oliveira, Maria Inês Lenz Souza, Camila Celeste Brandão Ferreira Ítavo, Ruy Alberto Caetano Corrêa Filho, Maria da Graça Morais, João Alberto Negrão, [...]

01/Oct/2014

Live weight and metabolic hormone profile in steers moved in drives

Marcella Cândia D'Oliveira, Maria Inês Lenz Souza, Camila Celeste Brandão Ferreira Ítavo, Ruy Alberto Caetano Corrêa Filho, Maria da Graça Morais, João Alberto Negrão, [...]

DOI: 10.1590/S1516-35982014001000007

The objective was to determine the effects of driving on the growth of steers during 55 days of moving by drive and 84 days after the arrival. Twenty-five steers were randomly chosen from a herd of 1,000 Nellore cattle, which were evaluated in two periods: the driving period, in which animals were moved a distance of 700 km on foot for 55 d; and the post-driving period, which lasted 84 d. Serum samples were obtained for hormone dosing (T3, T4, […]

Keywords: compensatory gain; metabolism; post-driving; transportation

More

Effects of heat stress on the physiological parameters and productivity of hair sheep in tropical and coastal environments

Antonio Gesualdi Júnior, Érika Sá Viana Sales, Rafael Souza Freitas, Fábio da Costa Henry, Vicente de Paulo Santos de Oliveira, Ana Cristina Ladeira de Souza Gesualdi

01/Oct/2014

Effects of heat stress on the physiological parameters and productivity of hair sheep in tropical and coastal environments

Antonio Gesualdi Júnior, Érika Sá Viana Sales, Rafael Souza Freitas, Fábio da Costa Henry, Vicente de Paulo Santos de Oliveira, Ana Cristina Ladeira de Souza Gesualdi

DOI: 10.1590/S1516-35982014001000008

The experiment was carried out with sheep during the finishing phase in a partial confinement system to evaluate the following physiological parameters: rectal temperature (RT), respiratory rate (RR), heart rate (HR), productive performance and carcass characteristics. Fourteen uncastrated sheep with an average initial age of 90 days belonging to two genetic groups were used. There were seven Santa Inês animals, whose average initial live weight (ILW) was 23.65 kg, and seven F1 Dorper × St. Inês animals, with an ILW […]

Keywords: adaptability; animal production; bioclimatology

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amino acids beef cattle Brachiaria decumbens carcass dairy cattle digestibility feedlot growth heritability intake Nellore nutrition Pennisetum purpureum performance pH protein sheep swine urea weight gain

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ISSN: 1516-3598 (printed version from 1997 to 2009)

e-ISSN: 1806-9290

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