THE SAFETY AND PRODUCTIVITY OF LAYING HENS OF THE HIGHSEX BROWN CROSS USING DIFFERENT RECIPES OF CF
The paper presents the results of a study on the hens of the Highsex Brown cross. The safety and productivity of laying hens using different recipes of complete feed (CF) was determined. The CFs differed in nutritional value. In feed for the first group, the content of the main indicators of nutrition was higher than the regulatory requirements. The excess of protein in the diet of laying hens led to a decrease in productivity, a decrease in the accumulation of vitamins A and B in the liver and inefficient use of protein for energy purposes. The recipe of CF for laying hens of the first group included more than 3% of sunflower oil. Therefore, there was an excess of linoleic acid, which adversely affected the mineral metabolism, the quality of eggs, lead to diseases of the reproductive organs of the poultry. In laying hens of the first group the frequency of cases of chronic and subclinical forms of diseases associated with metabolic disorders increased with age. Most frequently the pathology of the liver and uric acid metabolism were diagnosed. The tendency of increasing the content of nitrogen oxide metabolites in the blood of hens was revealed. With the change in the nutritional value of CF for laying hens, their metabolic status changes, which affects the safety of the poultry, productivity, metabolism and resistance of poultry.