The content of Hb in the blood and of different constituents in the plasma of lambs with low and normal increase in body mass

: In lambs with a very restricted intake of nutrients and an increase of the body mass of less than 60 g per day (group A) and in those with an increase of more than 220 g/day (group B), analyses of components of the blood and the plasma were performed at certain intervals. In the lambs of group A an anemia developed in the course of 77 days. The concentrations of alpha-amino-N, non-protein-N, urea, glucose and insulin as well as the activity of the alkaline phosphatase of the plasma of the lambs of group A were always lower than those of group B. The beta-hydroxybutyrate concentration of the lambs of group A on the 7th and 21st day of the experiment was higher than that of group B. The concentrations of inorganic phosphate and iron in the plasma of group A at most points during the study were lower than that in group B.