Changes in goslings’ blood pattern under the influence of different doses additives of selenium in forages

According to many scientists, the list of trace elements that are currently used in compound feeds for various types of poultry is clearly insufficient. In recent years, applied research has been conducted to determine the physiological needs of poultry for certain mineral elements that perform important biochemical functions in the body. This also applies to such biotic ultramicroelement as selenium. Scientific research of domestic and foreign scientists in the field of physiology, biochemistry, medicine and veterinary medicine has proved that selenium is a trace element with a fairly wide range of physiological and biochemical effects. When developing and theoretically justifying optimal norms for introducing selenium into poultry feed, it is necessary to evaluate not only its productive qualities, but also the blood picture. The question of the influence of selenium on changes in blood parameters in the poultry body is a great theoretical and practical significance because it allows us to expand our knowledge of its biological role and explain the data obtained in experiments. In scientific and economic experience has been studied the influence of additives of different doses of selenium in compound feed on the morphological and biochemical parameters of the goslings' blood raised for meat. During the experiment, feeding of goslings of all groups were carried out with dry feed mixes in accordance with existing norms. The goslings of the first control group did not receive selenium supplementation. The poultry of the second experimental group were additionally fed selenium at the rate of 0.2 mg/kg, the third of 0.3 and the fourth of 0.4 mg/kg. It is established that the additive in the feed of different doses of selenium stimulate hemocytopoiesis are added to different compound feeds, this is achieved by a homogeneous tendency per day, within physiological values in the goslings' peripheral blood number of red blood cells (by 1.7–3.9 %), white blood cells (by 2.1–3.2 %) and hemoglobin (by 2.4–8.6 %). Immune defense mechanisms are activated, which is manifested in an increase in the level of total protein (by 1.4–3.8 %) and the concentration of immunoglobulins in the blood serum (by 3.2–9.7 %). It is found changes in the content of total glutathione and its reduced form in the blood indicate a positive effect of selenium on the non-enzymatic element of the antioxidant defense system of the poultry's body. The addition of selenium to compound feed at a dose of 0.3 mg/kg had a significant effect on the morphological and biochemical parameters of the goslings' blood raised for meat.