| Journal: | Revista Brasileira de Zootecnia |
| Database: | PERIÓDICA |
| System number: | 000444369 |
| ISSN: | 1516-3598 |
| Authors: | Rennó, Luciana Navajas1 Gomes, Rafael Aparecido2 Martins, Taiane da Silva1 Busato, Karina Costa1 Ladeira, Marcio Machado3 Oliveira, Maria Helena de3 Silva-Junior, Jarbas Miguel da1 Chizzotti, Mario Luiz1 |
| Institutions: | 1Universidade Federal de Vicosa, Departamento de Zootecnia, Vicosa, Minas Gerais. Brasil 2Instituto Federal de Educacao, Ciencia e Tecnologia do Para, Castanhal, Para. Brasil 3Universidade Federal de Lavras, Departamento de Zootecnia, Lavras, Minas Gerais. Brasil |
| Year: | 2019 |
| Volumen: | 48 |
| Country: | Brasil |
| Language: | Inglés |
| Document type: | Nota breve o noticia |
| Approach: | Experimental, analítico |
| English abstract | We evaluated blood parameters of Angus and Nellore bulls fed diets with and without forage. Forty animals with initial body weight (BW) of 380±16.2 kg were housed in individual stalls. Eight bulls of each breed were fed a whole shelled corn (WSC) diet [850 g kg−1 of WCS and 150 g kg−1 of a pellet based on soybean meal, dry mater (DM) basis] or a ground corn with silage (GC) diet (300 g kg−1 of silage and 700 g kg−1 of a concentrate based on corn and soybean meal, DM basis), ad libitum, and four animals of each breed were limited-fed the GC diet [feed restriction (FR), 55% of the DM intake of bulls fed ad libitum, adjusted for the metabolic BW]. Intake was measured daily, and a metabolism trial was conducted with total collection of feces and urine to estimate the ruminally degraded and undegraded protein (intake and nitrogen balance). Blood samples for determination of hormones and metabolites were collected. The data were analyzed using the GLM procedure of SAS adopting a significance level of 0.05. The diet affected only the serum concentrations of triglycerides, HDL, and VLDL, with limited-fed animals presenting smaller concentrations than ad libitum-fed bulls. No difference in blood parameters was observed between animals fed WSC or GC diets. Nellore bulls presented greater T4, cholesterol, HDL, LDL, and serum urea nitrogen concentrations than Angus. Feeding finishing beef cattle with no-roughage diets does not alter their blood parameters. Also, our results support that Zebu cattle might have lower serum removal of nutrients due to a lesser demand for fat and protein deposition than Bos taurus taurus |
| Disciplines: | Medicina veterinaria y zootecnia |
| Keyword: | Bovinos, Nutrición animal, Medicina veterinaria, Toros, Angus, Nelore, Bos taurus indicus, Bos taurus taurus, Hormonas, Metabolitos sanguíneos, Bos taurus indicus, Bos taurus taurus |
| Keyword: | Bovines, Veterinary medicine, Animal nutrition, Bulls, Angus, Nellore, Blood metabolites, Hormones |
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