The amino acid composition of rumen-undegradable protein: A comparison between forages
| Autor: | A. Schröder, Karl-Heinz Südekum, R. Bennett, F.J. Schwarz, H. Spiekers, B. Edmunds |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
Rumen
Lysine Forage Biology Animal science Fodder Lolium Medicago Genetics Animals Amino Acids Incubation chemistry.chemical_classification Residue (complex analysis) Animal Feed Amino acid Solubility Agronomy chemistry Fermentation Cattle Digestion Female Animal Science and Zoology Composition (visual arts) Dietary Proteins Medicago sativa Food Science |
| Zdroj: | Journal of Dairy Science. 96:4568-4577 |
| ISSN: | 0022-0302 |
| DOI: | 10.3168/jds.2012-6536 |
| Popis: | The objective of this study was to improve knowledge regarding the amino acid profile of the insoluble portion of ingested forage escaping rumen degradation. Six forage categories were analyzed. Categories varied in botanical composition and each contained 2 samples. Samples within categories were derived from the same parent material but differed in harvest, maturity, or conservation type. The rumen-undegradable protein of all forages was measured by incubation for 16h in the rumen of 3 nonlactating cows. All residues were corrected for microbial colonization. The AA profile of the residue was different to the original profile. Degradation trends of individual AA, in terms of increase or decrease relative to the original concentration, were similar between all forages. The AA profiles of forage residues, both within and between categories, were more similar to each other than to their respective original profile. This information may aid in improving the accuracy of estimating postruminal AA supply from forages while decreasing the number of samples required to be analyzed. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|