Influence of the source of protein in the ration on the duodenal flow of amino acids in lactating dairy cows

Abstract

nal digesta was calculated from PEG and Yb recovered in faeces.When feeding the pulp diet, total OM intake was higher (14.1 vs 13.1 kg/d, P < 0.10), OM digestibility was lower (0.76 vs 0.79, P < 0.01 ), but DOM intake (DOMI, 10.5 kg/d), the proportion of DOMI that disappeared in the rumen (0.66) and N intake (49 g/kg DOMI) were not affected, com-