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.

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Recently, the oil processing industry has been actively developing in the Lower Volga region, the by-products of which are presscake and extracted meal. The purpose of our research was to study the infl uence of feeding local non-traditional feed sources as part of compound feed on the live weight of broiler chickens and rainbow trout. Studies on broiler chickens of the cross Ross 308 were carried out at the Research Center for the safety and eff ectiveness of feed and Additives of the Volgograd State Agrarian University. The chickens of the control group received compound feed with sunfl ower presscake, and in the diet of poultry of the 1st, 2nd and 3rd experimental groups sunfl ower presscake was replaced with amaranth presscake – 50, 75 and 100 %, respectively. Scientifi c and economic experiment on the study of the possibility of including protein concentrate Gorlinka in compound feed for rainbow trout was carried out at the enterprise SO Kalmykova I. O. The fi sh of the control group received compound feed with sunfl ower extracted meal, and individuals of the 1st, 2nd and 3rd experimental groups received compound feed, in which sunfl ower extracted meal was replaced by Gorlinka concentrate – 50, 75 and 100 %, respectively, by groups. It was concluded on the base of conducted studies that the introduction of amaranth presscake into the formula of compound feed had a positive eff ect on the meat productivity of broiler chickens of the cross Ross 308. So, during the period of the experiment the live weight of poultry was increased by 2,15–5,26 %, and the slaughter yield increased to 0,29 abs.%. The use of mustard protein-containing concentrate Gorlinka in compound feed for rainbow trout contributed to the increase in the total live weight gain by 2,83–6,93 %.

The main grain feeds for animals in our country are still corn, wheat and barley. It is known that animals and poultry are competitors to humans in terms of grain consumption. Therefore, it is currently relevant in the fi eld of mono-gastric animals feeding to search for non-traditional feed sources. One of these is sorghum grain. The purpose of the work was to increase the live weight of young pigs when using low-cost compound feed with sorghum. We carried out a scientifi c and economic experiment at the LLC “TOPAGRO” enterprise in the Volgograd region on young pigs of three-breed hybrids. The animals of the control group received an farm diet with corn, and in the diet of the animals of the 1st, 2nd and 3rd experimental groups, 50, 75 and 100 % of corn was replaced with sorghum. In the feeding diet of pigs, partial or complete replacement of corn grain with sorghum of the variety Kamyshinskoe 75 contributed to an increase in the digestibility of nutrients compared with the indicators of analogues of the control group. The live weight of pigs on 119 days of experiment in the 1st experimental group was by 1,77 % higher than the control group, in the 2nd experimental group by 3,09 % (P > 0,95) and in the 3rd experimental group by 2,66 kg than in the control group. Control slaughter of animals has shown that the slaughter yield in the experimental groups was higher than in the control group from 0,53 to 0,91 abs.%. Thus, the replacement of corn grain with sorghum in the diets of pigs of the 1st, 2nd and 3rd experimental groups positively aff ected the digestibility of nutrients of compound feed and meat productivity of pigs.

The purpose of the research was to study the feasibility of using different balancing feed additives in the rations of young ruminants and cattle. In order to achieve this purpose, two scientific and farm experiments were conducted on the development and use of balancing additives in the rations of young ruminants and cattle. The first experiment was carried out in the Volgograd region on the herd of sheep of Volgograd breed in the IE FARM Kushkalova A. B., the second was carried out in in the Voronezh region on heifers of Holstein breed on the basis of the Korshevo livestock complex OOO EkoNivaAgro. In the first experiment the sheep of the control group were fed a general economic ration, the animals of the 1st experimental group were input with a mineral balancing feed additive instead of the mineral part of the ration recipe No. 1, the 2nd experimental group with the recipe No. 2 and the 3rd experimental group with the recipe No. 3. In the second experiment heifers from the 14th day of life received premix P-62–1 as part of the compound feed, the young cattle of the experimental group as part of the starter feed were replaced with premix P-62-1 with MegamixNoris. After 6 months, the animals of the control group received premix P-63-1 as part of the ration, and the heifers of experimental group received premix MegamixVitulaOpti. The inclusion of the mineral complex in the ration of sheep of the 1st, 2nd and 3rd experimental groups contributed to an increase in the digestibility coefficients. Thus, the digestibility of dry matter was higher than that of analogues from the control by 1,03; 0,59 and 0,21 abs.%, organic matter by 1,95; 1,80 and 1,59 abs.%, crude protein by 1,15; 0,97 and 0,84 abs.%, crude fiber by 1,09; 0,62 and 0,23 abs.%. The nitrogen digestibility in them was higher from the taken by 1,12, 0,79 and 0,63 abs.% and from the digested by 1,18, 0,73 and 0,61 abs.%. The young sheep of the experimental groups significantly exceeded the analogues from the control in live weight at the age of 8 months by 1,82–6,93 %. The input of the tested premixes into the ration of heifers allowed to increase the digestibility of dry matter by 1,29 abs.%, organic matter by 2,26 abs.%, crude protein by 2,54 abs.%, crude fat by 4,18 abs.%, crude fiber by 3,15 abs.%, nitrogen-free extractive substances by 4,16 abs.%. Nitrogen assimilation from the intake increased by 2,18 abs.%. At the same time, the live weight of heifers was increased by 10,37 % compared to analogues from the control group.