Resistance and productivity of pedigree calves of dairy period depending on macroelements level in a diet | Резистентность и продуктивность племенных бычков молочного периода в зависимости от уровня макроэлементов в рационе
2011
Shaura, T.A. | Goryachev, I.I., Vitebsk State Academy of Veterinary Medicine (Belarus)
In the conditions of the Republic of Belarus there was studied influence of increased doses of calcium and phosphorous in rations on clinical blood indexes, state of natural resistance and productivity level of pedigree calves till 6-month old age. It was determined that increased levels of calcium and phosphorus in the diets for pedigree calves in dairy period at 10 and 20% relative to the norms of Agricultural Sciences (2003) can increase the average daily growth at 2,1 and 4,2%, increase the phagocytic activity of leukocytes at 4,3 and 6,9%, the total protein content in blood serum - at 7,9 and 10,6%, y-globulin fraction - at 2,4 and 3,3%, the amount of hemoglobin - at 9,1 and 11,1% and red blood cells - at 3,4 and 4,7% compared with the control animals.
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