The paper presents the main results of the experiment on the use of high-protein concentrate “Gorlinka” in the diets of dairy cows and laying hens on their productive qualities. It was found that in terms of the main indicators of nutritional value (protein, fat, nitrogen-free extractives, ash elements), as well as in terms of amino acid composition and mineral substances, the studied concentrate surpasses the traditionally used in feeding farm animals and birds, oil cake and meal from sunflower seeds. The results of studies have shown that the groups of animals that received protein concentrate with the diet were in the lead. The use of protein concentrate “Gorlinka” in the feeding of dairy cows and laying hens increased the average daily milk yields of cows by 5.47-7.12%. There were also positive changes in the mass fraction of protein in milk by 0.03-0.04%, in dry matter by 0.04-0.09%, in the number of eggs laid by laying hens by 216-822 pieces, in the average egg weight by 0.77-1.66 g. Thus, the use of protein concentrate “Gorlinka” in feeding dairy cows and laying hens had a positive effect on the quality of the products (milk and edible eggs), while economic indicators improved.

The purpose of the research was to study the eff ect of the mineral complex “Availa Chrome 1000”, which used in the feeding of laying hens of the highly productive cross Highsex Brown under the conditions of the Research Center for the Safety and Eff ectiveness of Feed and Additives of the Volgograd State Agrarian University. For the experiment two groups of laying hens (control and experimental) have been formed with 70 heads in each. The diff erence between the groups was that the laying hens of the control group received a complete farm diet, and into the diet of the laying hens of the experimental group the feed additive “Availa Chrome 100” in the amount of 300 g/t of compound feed was introduced. It has been found during the study of the coeffi cients of digestibility of nutrients of the diet in the experimental poultry that the best digestibility diff ered laying hens of the experimental group where the additive “Avila Chrome 1000” in the amount of 300 g/t of compound feed has been put into the basic diet. It has been found as a result that the tested mineral additive increases the digestibility of dry matter by 3,09 %, organic matter by 2,59 %, crude protein by 1,35 %, crude fat by 2,16 %, crude fi ber by 0,63 %. The studied feed additive had a stimulating eff ect on the formation of red blood cells the level of which increased in the blood of poultry of the experimental group by 2,87 %. It has been found that in laying hens of the experimental group the level of hemoglobin was higher by 6,25 %. The use of the mineral complex allowed to improve the egg productivity of poultry by 3,3 % and increase the egg mass by 2,66 %. The inter-group economic eff ect for the period of experiment reached 573,43 rubles, so we believe that the use of organic chromium additives is economically feasible.

The purpose of the research was to develop and study the effect of the use of lowexpenditures compound feed in poultry feeding on hematological and biochemical blood parameters. In order to achieve this purpose, three scientific and economic experiments were carried out on the development and use of low-expenditures compound feed in the feeding of Haisex Brown egg cross poultry. Two experiments were carried out under the conditions of the Scientific and Research Center safety and effectiveness of feed and additives of the Federal State Budgetary Educational Institution of Higher Education “Volgograd State Agrarian University”, the third experiment was conducted at the AO Volga Poultry Farm in the Sredneakhtubinsky area in the Volgograd region. The first experiment included the study of the effect of the anti-stress additive Feed-Food Magic Antistress Mix, in the second scientific and economic experiment the use of the Availa Cr mineral complex was studied, and in the third experiment the research was conducted to study the effectiveness of using lupin grain instead of full-fat soy in the diets of laying hens. The inclusion of the Feed-Food Magic Antistress Mix additive in the diet of egg-bearing poultry contributed to an increase in the number of red blood cells. So, their indicator was in the experimental group at the level of 3,96×10¹²/l, in the control group it was in the range of 3,55×10¹²/l, there was then increase in the concentration of hemoglobin in the experimental group by 5,82 g/l. The use of the Availa Cr mineral complex allowed to increase the hematocrit level in the blood of egg poultry by 1,38 %, to reduce the number of leukocytes in the experimental group by 0,38×10⁹/l. The inclusion of lupine grains in the diet contributed to the increase in the number of red blood cells by 0,14×10¹²/l, the increase in total protein in the blood by 2,65 g/l, the increase in the level of carotene and vitamins A and E.