Digestion coefficient of nutrients did not significantly differed between diets (P > 0.05). In agreementwith these observations, Hristov et al. (2004) reportedthat ruminal apparent or true digestibility of DM, OM,NDF and N was not affected by 15.8% or 18.3% of CPin the diets. However, under the current experiment,digestibilities were lower than those reported by Wanapatet al. (2009a).