Some diagnosis centers calculate milk urea (MU, g/L) rather than MUN (mg/ dL). Thus, the conversion from MU to MUN can be made simply by multiplying MU by 47, just because in weight basis urea is 47% nitrogen. Sampling time related to feeding should be about 3 hours after a major protein is fed. The minimum recommended sample size is 8 cows at any stage of lactation.
Reproductive success is always a challenge in dairy cattle operations. To learn how to use these diagnostic tools to monitor reproduction in your herd contact your herd veterinarian or your local Accelerated Genetics’ Reproduction Support Team or call 800-451-9275 or e-mail Humberto Rivera at firstname.lastname@example.org or Alex Souza at email@example.com.
Effect of estradiol-17 supplementation before the last GnRH of the Ovsynch protocol in high producing dairy cows. 2007. A.H. Souza, A. Gümen, E.P.B. Silva, A.P. Cunha, J.N. Guenther, C. M. Peto, D. Z. Caraviello and M.C. Wiltbank. 2007. J. Dairy. Sci. 90:4623-4634.
Rumenacidosis with special emphasis on diagnostic aspectsof subclinical rumen acidosis: a review. 2002. Jörg Matthias Dehn Enemark, Rolf Jess Jørgensen, Peter St. Enemark. Vet. Zoot. 20:1392-2130.
Diagnostic methods for the detection of subacute ruminal acidosis in dairy cows. 1999. E.F. Garrett, M.N. Pereira, K.V. Nordlund, L.E. Armentano, W.J. Goodger, G.R. Oetzel. J. Dairy Sci. 82:1170-1178.
The effect of subclinical ketosis in early lactation on reproductive performance of postpartum dairy cows. 2007. R.B. Walsh, J.S. Walton, D.F. Kelton, S.J. LeBlanc, K.E. Leslie, and T.F. Duffield. J. Dairy. Sci. 90:2788-2796.
Update on Dairy Herd Nutrition Troubleshooting. 2000. Garret Oetzel. Proceedings, 16th Annual Postgraduate Conference - Large Animal Proceedings, School of Veterinary Medicine, University of Wisconsin-Madison. p 109-126.