Effect of fasting on the concentration of amide nitrogen in the blood plasma of sheep
Rybosová, E.; Havassy, I.
Veterinarni Medicina 26(3): 177-182
1981
ISSN/ISBN: 0375-8427 PMID: 6789534 Document Number: 175018
The experiments with sheep starving 24, 48, 72 and 96 hrs after the last feeding showed that on the second day of starving the concentration of the total amide nitrogen in plasma increased significantly (P less than 0.01) both at a lower (7.6 g of nitrogen per day) and at a higher (24 g of nitrogen per day) nitrogen uptake before the beginning of starvation. The concentration of free amide nitrogen, unbound to plasma proteins, increased only at the lower nitrogen intake before starving. At the studied stages of fasting no significant differences in the levels of total and free amide nitrogen in plasma having a relation to nitrogen intake before starvation were found. With the increased urea level in plasma a parallel increase of the total amide nitrogen was observed only in the plasma of sheep fed before starvation the diet with a higher nitrogen content. The results confirm that a short-term starvation is one of the factors which can influence the relatively stable concentration of amide nitrogen in plasma.