Ruminal Peptide and Ammonia Nitrogen Concentrations in Holstein Steers Fed Diets Differing in Concentrate to Alfalfa Hay Ratios

A.R.Vakili, M. Danesh Mesgaran, A. Heravi Moussavi, R.Valizadeh and M. R. Nassiry

Journal of Animal and Veterinary Advances 6 ( 3 ): 392 - 398 , 2007