The Utilization of Urea by Ruminants as Influenced by the Presence of Starch in the Ration

Abstract

In an earlier publication (3) we discussed the influence of the level of protein in the ration on the utilization of urea by a heifer with a rumen fistula. The data indicated that when the protein level in the concentrate mixture was above 18 per cent, any added urea was poorly converted into protein.