Effect of Urea Form and Method of Feeding on Rumen Ammonia Concentration

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Abstract

Rumen ammonia was compared in six rumen fistulated, lactating Holstein cows fed urea twice daily in a concentrate mixture, urea fed once per day in a complete ration, and a gelatinized starchurea product fed twice daily in the concentrate mixture. Samples were taken during 24-h intervals at the end of each 3 wk. Sharp and similar peaks in rumen ammonia followed feeding of urea and gelatinized urea-starch product twice daily in the concentrate mixture. A much lower ammonia peak followed the once daily feeding of the complete ration. Use of complete rations offered ad libitum eliminates the need for products with sustained ammonia release. © 1976, American Dairy Science Association. All rights reserved.

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Coppock, C. E., Peplowski, M. A., & Lake, G. B. (1976). Effect of Urea Form and Method of Feeding on Rumen Ammonia Concentration. Journal of Dairy Science, 59(6), 1152–1156. https://doi.org/10.3168/jds.S0022-0302(76)84336-6

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