Efficiency of using the feed additive "Ostopherol-calcium" in the diets of laying hens

Purpose. To establish the effect of the new feed additive "Ostoferol-calcium" on the clinical condition and safety of farm poultry, the dynamics of live weight, hematological parameters and productive qualities and when it is included in the diet of laying hens. Materials and Methods. The studies were conducted on laying hens of the Hisex Brown cross, at the age of 36 weeks, in the conditions of LLC Poultry Farm Irbitskaya (Sverdlovsk region). The object of research is laying hens and the new mineral supplement “Ostopherol-calcium”. Two groups of laying hens (30 birds each) were formed. The control group birds received water without the studied additive, the experimental group received the mineral additive “Ostopherol-calcium” in the amount of 1 liter per 1000 liters of water. The duration of the study is 60 days. Zootechnical, clinical and biochemical research methods were used to carry out research work. Laboratory hematological studies were carried out on automatic biochemical analyzers URIT-800Vet and URIT-3020 (China) using the appropriate set of biochemical reagents in the comprehensive analytical laboratory of VRIMMP (Volgograd, Russia). The obtained results were processed using software, calculating the average value (M), standard errors of the average (±SEM) and determining the criterion for the reliability of the Student-Fisher difference. Results. During the period of use of the feed additive "Ostopherol-calcium", the increase in the level of calcium, magnesium and vitamin D on the 30th day in the blood serum of chickens of the experimental group was 26.7 (P≤0.05); 38.3 (P≤0.05) and 32.5% (P≤0.05); on the 60th day – 42.1 (P≤0.05); 80.0 (P≤0.05) and 35.9% (P≤0.05), respectively. Indicators of egg productivity and intensity of egg production of laying hens in the experimental group for 60 days of oviposition were higher than in the control by 5.9 (P≤0.05) and 4.81% (P≤0.05), the average egg weight was by 2.2% (P≤0.05), shell thickness – by 9.0% (P≤0.05), the degree of elastic deformation of egg shells – by 15.4% (P≤0.05). Conclusion. According to the results of the study, it can be concluded that the improvement in indicators was the result of a more complete provision of poultry with calcium and magnesium elements, vitamin D3 as a result of the use of a new feed additive.