Use este identificador para citar ou linkar para este item:
http://hdl.handle.net/1843/52923| Tipo: | Artigo de Periódico |
| Título: | Energy to protein ratios in supplements for grazing heifers in the rainy season |
| Autor(es): | Alyce Raiana Monteiro dos Santos Carla Heloísa Avelino Cabral Carlos Eduardo Avelino Cabral Livia Vieira de Barros Jackelliny Melo de Barros Welton Batista Cabral Milene Rodrigues Dias |
| Resumo: | This study evaluated the effect of energy and protein supplementation on the nutritional characteristics, ingestive behavior, and productive performance in grazing heifers during the rainy season. Forty crossbred heifers (Nelore breed predominance) were used in the study, with an age of 14 months and an initial mean weight of 182 ± 1.13 kg. The treatments consisted of mineral supplementation ad libitum (control) and three supplements formulated to contain an energy: protein ratio (TDN:CP) of 1.13, 2.62, and 4.06; these were denominated as low (LC, 0.5 kg animal d−1), medium (MC, 1.0 kg animal d−1), and high consumption (HC, 1.5 kg animal d−1), respectively, in order to guarantee an intake of 300 g of crude protein (CP) animal−1 d −1, with variation in energy content. There was a difference (P < 0.05) in crude protein intake, with a 44% reduction for the LC treatment in relation to HC. The lowest grazing time (398 min) was observed with the MC treatment. Urinary urea-N (UreaN) was lower for control animals (P < 0.05). Average daily gain (ADG) was lower for the control animals than for the supplemented animals (P < 0.05); there was no difference in ADG between the animals receiving supplementation. High supplementation levels and TDN:CP ratios are not recommended because they do not justify the increased costs of supplementation. Therefore, when forage presents great nutritional characteristics, it is possible to optimize the performance of the animals with low to medium consumption supplementation. |
| Assunto: | Desempenho Ruminante - Alimentação e rações Bovino Pastejo |
| Idioma: | eng |
| País: | Brasil |
| Editor: | Universidade Federal de Minas Gerais |
| Sigla da Instituição: | UFMG |
| Departamento: | ICA - INSTITUTO DE CIÊNCIAS AGRÁRIAS |
| Tipo de Acesso: | Acesso Restrito |
| Identificador DOI: | https://doi.org/10.1007/s11250-019-01953-8 |
| URI: | http://hdl.handle.net/1843/52923 |
| Data do documento: | 2019 |
| metadata.dc.url.externa: | https://link.springer.com/article/10.1007/s11250-019-01953-8 |
| metadata.dc.relation.ispartof: | Tropical Animal Health and Production |
| Aparece nas coleções: | Artigo de Periódico |
Arquivos associados a este item:
Não existem arquivos associados a este item.
Os itens no repositório estão protegidos por copyright, com todos os direitos reservados, salvo quando é indicado o contrário.