J. Anim Sci.
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J. Anim Sci. 1972. 35:1083-1086.
© 1972 American Society of Animal Science
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Use of Molasses Dried Beet Pulp-Urea as an NPN Source for Young Ruminants1

R. P. Randall2, 3,, R. W. Wallenius, I. A. Dyer and J. K. Hillers

Washington State University, Pullman 99163

Abstract

TWO experiments were conducted to evaluate the effectiveness of a MDBP-U pellet (49% C.P.) as a source of supplemental N for young calves. In both experiments, animals were fed rations containing the same basal ingredients but varying in the source of supplemental N.

Average daily gain, feed consumption and feed efficiency of 36 heifers were measured over a 112-day feeding period starting at 2 months of age. Animals consuming the MDBP-U, SBM and urea supplemented rations gained more weight and were more efficient than those on the basal ration. Feed consumption was lower in the basal groups. However, this difference was significant in the Guernsey trial only. The differences in feed intake for heifers receiving MDBP-U as compared to urea alone suggest some possibility of beneficial palatability or energy effects.

In additional studies using 12 2-month-old steers, source of supplemental N had no effect on blood ammonia-N concentrations. Carcass composition, as determined by carcass density and chemical composition of the longissimus muscle, was not affected by the different N treatments.

Footnotes

1 Scientific Paper No. 3855. College of Agriculture Research Center, Project 1788.

2 Data presented are from a thesis submitted by Ronald P. Randall to the Graduate School, Washington State University, in partial fulfillment of the requirments for the degree of Master of Science.

3 Present address: Department of Animal Science, Orgeon State University, Corvallis.






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