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