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https://locus.ufv.br//handle/123456789/21015
Tipo: | Artigo |
Título: | Kinetics of digestion of low-quality forage grazed by beef cattle fed supplements containing increasing levels of rumen undegradable protein |
Autor(es): | Gomes, Raphael dos Santos Oliveira, Tadeu Silva de Pereira, José Carlos Vieira, Ricardo Augusto Mendonça Silva, Cássio José da Leonel, Fernando de Paula Fernandes, Alberto Magno Azevedo, Flavio Henrique Vidal |
Abstract: | This experiment was conducted to evaluate the degradation kinetics and microbial efficiency of beef cattle grazing on low-quality forage and receiving supplements with different levels of rumen undegradable protein (RUP). The animals grazed on palisade grass pasture solely or this pasture and supplement containing 40 or 60 g of RUP per 100 g of crude protein (CP). The degradation profiles of neutral detergent fiber, fiber carbohydrates, and neutral detergent insoluble protein were interpreted kinetically by using a decreasing logistic model. Treatments (no supplement, or RUP at 40 or 60 g−1 100 g CP) did not affect rumen fill; however, the increase in the indigestible fiber carbohydrate fraction that occurred at the expense of the digestible fiber carbohydrate fraction resulted in a greater rumen fill effect. The palisade grass showed a significant proportion of its nitrogen in the form of slowly degradable protein as neutral detergent insoluble protein, which amounted to 26 g per 100 g CP. Supplementation with 40 g of RUP per 100 g CP decresead the indigestible fraction of the low-quality forage. However, the absence of a rumen-fill effect demonstrates that the additional supply of nutrients contributes greatly to increasing growth efficiency and use of the available energy from the forage by the ruminal microorganisms. |
Palavras-chave: | Degradable protein Palisade grass Supplementation |
Editor: | Revista Brasileira de Zootecnia |
Tipo de Acesso: | Open Access |
URI: | http://dx.doi.org/10.1590/s1806-92902016000900009 http://www.locus.ufv.br/handle/123456789/21015 |
Data do documento: | Set-2016 |
Aparece nas coleções: | Artigos |
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artigo.pdf | texto completo | 1,07 MB | Adobe PDF | Visualizar/Abrir |
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