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  • Title: Effect of dietary protein and urea on in vitro caecal ammonia production from urea and uric acid in cockerels.
    Author: Karasawa Y, Umemoto M, Koh K.
    Journal: Br Poult Sci; 1993 Sep; 34(4):711-4. PubMed ID: 8242407.
    Abstract:
    1. Single Comb White Leghorn adult cockerels were fed on 50 g/kg protein diet, 200 g/kg protein diet or 50 g/kg protein diet plus urea and in vitro ammoniagenesis from urea and uric acid in the caeca was determined. 2. Four-fold protein intake caused about 4.6-fold increase in caecal ammonia production from urea (P < 0.05), and tended to increase it from uric acid as compared with 50 g/kg protein-fed birds. 3. Dietary urea significantly increased caecal ammonia production from urea and uric acid by about 2 and 3 times as much as those of control birds, respectively (P < 0.05). 4. It is concluded that increased protein intake and the feeding of urea are able to induce ammoniagenesis from urea and uric acid in the caeca of fowls.
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