Effect of dietary protein variation in terms of net truly digested intestinal protein (DVE) and rumen degraded protein balance (OEB) on the concentrations and excretion of urinary creatinine, purine derivatives and microbial N supply in sheep: comparison with the prediction from the DVE/OEB model

Abstract

This study examined (1) the effects of dietary protein variation in terms of net truly digestible intestinal protein (DVE value) and rumen degraded protein balance (OEB value) on the concentrations and daily excretion of urinary products (creatinine, allantoin, combined value for uric acid, hypoxanthine and xanthine, total purine derivatives (PD)) and microbial N supply in sheep; (2) the relationship between the concentration of urinary products on the one hand and daily intakes, protein values (DVE and OEB), urinary excretion of urinary products and microbial N supply on the other hand; (3) the comparison of two different methods in their ability to predict microbial N supply. Sheep were fe..