Reflux of ¹⁵N-labeled uric acid after intracloacal infusion in broiler chickens fed low- or high-protein diets.

ABSTRACT: Reflux of urine from the cloaca into the ceca provides chickens with a mechanism for recycling of urinary-Nitrogen (N) in a way analogous to urea recycling in mammals. However, it is unknown if reflux has substantial relevance in current poultry husbandry, where birds are fed ad libitum and have high protein intake. To evaluate the fate of urinary-N in ad libitum-fed broiler chickens, 15-day-old broilers were assigned to a high (21.9% CP, n = 22) or low (10.2 % CP, n = 22) protein diet. At 25 d of age, 20 broilers per dietary treatment were infused into the cloaca with a pulse dose of 107 mg [1,3-¹⁵N]-uric acid. N-contents and ¹⁵N-enrichment in digesta, blood plasma, and body tissues were measured at 5, 30, 60, 90, 150, 300, 450, 600, 1,200, or 1,800 min after adminis

SUBMITTER: de Vries S 

PROVIDER: S-EPMC8866718 | biostudies-literature | 2022 Apr

REPOSITORIES: biostudies-literature