SHORT COMMUNICATION
Ruminal protein metabolites and fibre fermentation differ among nonfibre carbohydrate and protein sources
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1
USDA-ARS U.S. Dairy Forage Research Center, 1925 Linden Drive West, Madison, WI 53706 USA
 
2
Department of Animal Sciences, University of Florida, P.O. Box 110910, Gainesville, FL 32611 USA
 
 
Publication date: 2004-08-30
 
 
J. Anim. Feed Sci. 2004;13(Suppl. 1):83-86
 
KEYWORDS
ABSTRACT
Effects of nonfibre carbohydrate source (NFC) and protein degradability (RDP) in vivo on concentrations of NH3, amino acids, and branch chain volatile fatty acids (BCVFA) in ruminal fluid, and on in situ disappearance of neutral detergent fibre (NDF) were evaluated. Treatment differences noted in BCVFA and amino acid concentrations suggest that ruminal protein digestion or use differs by NFC source. NFC source and the interaction of NFC × RDP affected in situ NDF disappearance; the effects did not appear to purely pH related. In situ NDF disappearance provided relative, not absolute, evaluation of NDF digestibility.
ISSN:1230-1388
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