The Utilization of Urea and Biuret as Sources of Nitrogen for Growing-Fattening Lambs

In a feeding trial involving fifty 75-lb. lambs, a 7.13 percent crude protein basal ration was fed. Adding either urea, biuret or crude biuret, or replacing part of the corn with soybean oil meal, significantly increased the average daily gain and feed efficiency of the lambs. No significant differences were noted among the lots fed the various supplemental nitrogen sources.It is concluded that, under the conditions of this experiment, urea, biuret and crude biuret are satisfactory sources of supplemental nitrogen for growing-fattening lambs. In addition, biuret appears to be less toxic than urea when fed in large amounts.