Urea metabolism in beef steers fed tall fescue, orchardgrass, or gamagrass hays.

Abstract

Two experiments were conducted to assess effects of endophyte treatments (Exp. 1), forage species (Exp. 2), and supplementation (Exp. 2) on urea production, excretion, and recycling in beef steers. Infusion of (15,15)N-urea and enrichment of urea in urine samples were used to calculate urea-N entry and recycling to the gut. Acceptably stable enrichment of… (More)
DOI: 10.2527/jas.2008-1444

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