Influence compensate for the lack of a number of micronutrients in the diet and blood of cows at different periods of reproductive function in the absorption of calcium and phosphorus
Studied in terms of the Stavropol Territory influence feeding of copper salts, manganese, zinc and cobalt, given the scarcity of these minerals in the diet, and animal blood, the concentration of total calcium and inorganic phosphorus in the blood of cows of the Holstein breed in different periods of reproductive function. According to the principle of paired analogues with the physiological state (of pregnant cows, postpartum, barren) formed the experimental and control groups of animals. In order to compensate for the detected significant deficiency of zinc, copper, manganese, cobalt salts of micronutri- entswas fed to animals. The concentration micronu- trientelements in whole blood of cows was determined by atomic absorption method using a spectrophotometer AAS-1. The concentration of total calcium was determined by complexometric method, inorganic phosphorus - Brigg''s method. The concentration of total calcium in the blood of experimental groups of animals had a positive correlative relationship with the concentration of micronutrientsin the blood of animals. Different in magnitude correlative connection concentration of phosphorus and micro- nutrientsduring the experiment stems from differences in digestibility of these elements the body of animals in different periods of the reproductive cycle. Introduction to the diet of cows of Holstein complex salts of micronutrientsin the amount caused by their deficiency in feed and animal blood, promotes the normalization of the total calcium and inorganic phosphorus in the blood, but their digestibility depends on the physiological state of the animals.