Relationships among milk urea-nitrogen, dietary ...
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| Title | Relationships among milk urea-nitrogen, dietary parameters, and fecal nitrogen in commercial dairy herds |
| Author(s) | P. Arunvipas, J. VanLeeuwen, I. Dohoo, G. Keefe, S. Burton, K. Lissemore |
| Journal | Canadian Journal of Veterinary Research |
| Date | 2008 |
| Volume | 72 |
| Issue | 5 |
| Start page | 449 |
| End page | 453 |
| Abstract | Our study objective was to determine the ability of milk urea-nitrogen concentrations ([MUN]) to predict fecal nitrogen concentrations ([Fecal N]) in commercial dairy herds. A total of 83 dairy herds were each visited 3 times within 48 h after a monthly herd milk test. For each farm visit, forages were sampled for nutrient analyses, which were entered into a computerized ration evaluator, and fecal samples were taken per rectum from each of 6 cows (2 early-, 2 mid-, and 2 late-lactation). Fecal samples were pooled, mixed, and analyzed for nitrogen content. Fecal nitrogen concentrations were compared with the routinely measured nutritional parameters from the ration evaluation, and the herd average [MUN] for the previous milk test date using mixed linear regression analyses. Total protein supplied in the ration was significantly positively associated with [Fecal N], but herd average [MUN] was not associated (P > 0.10) with [Fecal N]. |
| ISSN | 0830-9000 ER |
Using APA 6th Edition citation style.
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