Content and variability of nitrogen metabolism in cattle of the Holstein breed under conditions of Western Siberia

It is necessary to assess the state of nitrogen metabolism deepen control over usefulness feeding cattle and ensure prompt response nutritional imbalances diet adjustments. Nitrogen balance a key indicator metabolism. The authors presented results determining content variability indicators in Holstein Western Siberia. object study was bulls breed, obtained from four sires conditions industrial livestock enterprises West Siberian region. also studied main protein non-protein (using Vector-Best reagent kits): total protein, albumin, globulin, urea, creatinine, uric acid. found that globulins, acid were within generally accepted boundaries physiological norm for cattle. However, albumin-globulin coefficient below norm, creatinine level above norm. urea albuminglobulin characterized by highest rates variability, which indicates heterogeneity this population sample terms peculiarities course did not reveal statistically significant intergroup differences (p = 0.67), albumin 0.23), globulins 0.87), 0.96) urinary acids 0.31) using Kruskal-Wallis test. established influence father on 0.049) 0.042) blood serum offspring. analysis gram offspring while end products - creatinine.