Data/hora: 13/06/2024 04:54:05

Provedor de dados: | 96
País: | Brazil
Título: | Kinetics of digestion of low-quality forage grazed by beef cattle fed supplements containing increasing levels of rumen undegradable protein
Autores: | 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.
Data: | 2016-09-01
Ano: | 2016
Palavras-chave: | Degradable protein; Palisade grass; Supplementation.
Resumo: | 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.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982016000900563
Editor: | Sociedade Brasileira de Zootecnia
Relação: | 10.1590/s1806-92902016000900009
Formato: | text/html
Fonte: | Revista Brasileira de Zootecnia  v.45 n.9 2016
Fonte: | info:eu-repo/semantics/openAccess