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Título: | Nutritional performance and metabolic characteristics of cattle fed tropical forages with protein and starch supplementation |
Palavras-chave: | Brachiaria decumbens Digestibility Fiber IGF-1 Low-quality hay Nitrogen balance Plantas forrageiras tropicais Nutrição animal Bovinos - Digestibilidade Fibras Feno de baixa qualidade Balanço nitrogenado |
Data do documento: | Fev-2021 |
Editor: | Academia Brasileira de Ciências |
Citação: | FRANCO, M. O. et al. Nutritional performance and metabolic characteristics of cattle fed tropical forages with protein and starch supplementation. Anais da Academia Brasileira de Ciências, Rio de Janeiro, v. 93, n. 3, e20190487, 2021. DOI: 10.1590/0001-3765202120190487. |
Resumo: | Effects of protein supplementation, with and without starch supplementation, on nutritional performance and metabolic characteristics of cattle fed low- and medium-quality tropical forages were evaluated using 4 cannulated steers distributed according to a 4 × 4 Latin square. Experimental periods were divided into two subperiods. In the first subperiod, two animals received low-quality hay and two animals received medium-quality. Supplementation schemes were evaluated in the second subperiod: low-quality hay with protein (300 g of crude protein – CP/d); low-quality hay with protein (300 g CP/d) and starch (225 g/d); medium-quality hay with protein (300 g CP/d); and medium-quality hay with protein (300 g CP/d) and starch (225 g/d) supplementation. Without supplementation, medium-quality forage provided higher intake, digestibility, nitrogen balance (NB) and efficiency of nitrogen utilization (EFNU). Comparing subperiods, supply of supplements depressed medium-quality forage intake, but did not affect low-quality forage intake. Supplementation increased NB, EFNU and serum concentration of IGF1 in animals fed low-quality forage. Protein supplementation increases nitrogen retention in animals, an effect attributed mainly to anabolic stimuli. However, this effect is more prominent when animals are fed low-quality forages. No positive impact on animal metabolism was obtained with combination of supplemental protein and starch. |
URI: | http://repositorio.ufla.br/jspui/handle/1/50022 |
Aparece nas coleções: | DZO - Artigos publicados em periódicos |
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ARTIGO_Nutritional performance and metabolic characteristics of cattle fed tropical forages with protein and starch supplementation.pdf | 428,55 kB | Adobe PDF | Visualizar/Abrir |
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