Effect of mineral feed additive on egg productivity of laying hens

Improving the consumption and increasing the efficiency of the use of feed, obtaining maximum egg productivity is ensured by a high level of balanced feeding with various feed additives. Therefore, the research work aimed to study the effect of mineral feed additives on the egg productivity of laying hens of the Loman Brown cross. During the experiment, the control group of laying hens consumed the basic ration (BR) – complete combined feed. In feeding the research group, a mineral selenium-containing feed additive was used with the main diet. Selenium in the feed additive is contained in organic form, selenomethionine and selenocystin. Unlike inorganic forms, selenoamino acids can be transported and metabolized in the body to build amino acids. According to the results of the experiment, it was found that when feeding mineral feed additive, there was an increase in the gross collection of eggs in laying hens of the 2nd group by 12.7 % (Р ≥ 0.01) and a decrease in feed consumption by 10 pcs. eggs by 9.0 %, relative to the control group. In addition, there is a tendency to increase the laying rate per average laying hen by 9.5 % and the laying intensity by 3.9 %. With the additional use of the mineral feed additive by laying hens of the 2nd group, the mass of eggs increases by 5.3 % (Р < 0.05), the height of the yolk by 25.0 % (Р < 0.05), and the yolk index by 0.06 % (P < 0.01) versus the control value. It was established that the use of mineral supplements by laying hens of the 2nd group increases live weight by 5.1 % (Р ≤ 0.05), absolute gain by 12.3 % (Р ≤ 0.01), pre-slaughter live weight by 5.7 % (Р ≤ 0.05), the weight of the semi-cartridge by 4.3 % (Р ≤ 0.05) and the weight of the carcass by 11.5 % (Р ≤ 0.01) against the reference indicator. Under the influence of the mineral feed additive in the 2nd group of laying hens, the survival rate of the flock increased by 3.0 % compared to the control analogs.