Protein sources for cattle wintered on blue grama range

Shoop, M.; Rupp, G.P.; Remmenga, E.E.; Chenoweth, P.J.; Ball, L.

Proceedings of the first international rangeland congress, Denver, Colorado, USA, August 14-18, 1978 Hyder, DN Editor: 423-426

1978


Accession: 000728368

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Abstract
9 protein sources were compared for 3 yr as winter supplements for yearling heifers grazing blue grama range. On the loamy plains range site, liveweight gains tended to increase as level of protein increased, but the economic value of protein supplementation was questionable compared with grain supplementation. On the overflow site, dominated by Atriplex canescens, protein supplementation was uneconomical compared with grain supplementation. Dehydrated lucerne meal generally produced the same rates of liveweight gain as cottonseed meal. However, on loamy plains a low level of dehydrated lucerne meal produced greater gains than cottonseed meal when fed isonitrogenously and isocalorically. 3 supplements containing "slow-release" non-protein N (Starea, biuret, and isobutyldiurea) produced the same gain as a low-protein cottonseed supplement supplying 60% as much protein equivalent. A liquid supplement supplying 230 g protein daily produced no greater gain than a grain supplement supplying 40 g protein and less energy. No supplement affected health or pregnancy rates of the heifers.