Conditions Of Yakutia Research Articles

Effectiveness of complex use of non-traditional additives in feeding of horses

The purpose of the research was to investigate the efficiency of the complex use of non-traditional feed additives in the rations of horses during the winter period of housing. Scientific and industrial testing was carried out on horses of Yakut breed under the conditions of the peasant farm Rumyantsev S. I. in the Ust-Aldansky district of the Republic of Sakha (Yakutia). The scientifi c and industrial experiment was carried out in accordance with the methodological guidelines (VASKhNIL, 1984). It was found as a result of research that the loss of live weight in animals in the control group on average amounted to 26.4 kg, while in the experimental group this indicator was slightly better and equaled 21.3 kg. The fi nal diff erence between the groups at the end of the experiment was 94 kg in favor of the horses of the experimental group; ultimately this affected the coverage of additional costs and an increase in the economic efficiency of feeding. The estimated cost of the economic effect taking into account the difference in additional costs in the experimental group amounted to 20.68 thousand rubles. As a result, the profitability level in the control group was 45.5 %, and in the experimental group this figure increased to 45.8 %. We note that the data of the production testing confirm the previously obtained data of scientific and economic experiment and supplement the economic efficiency of horses feeding in the winter period of housing with new information. It was established as a result of research that the use of non-traditional feed additives from natural raw materials in the complex in feeding of horses in the winter period contributes to a comparatively better preservation of live weight, as well as an increase in the efficiency of feeding. Thus, the use of local non-traditional feed additives in the complex in feeding of horses of Yakut breed showed economic efficiency under the conditions of Yakutia.

Зооантропонозные гельминтозы промысловых животных Якутии

In the conditions of Yakutia, 6 helminthiasis were identified in wild game animals, which infected 8 species of animals: wolf, lynx, wolverine, fox, American mink, sable, ermine, weasel. It is known that helminthozoonoses pose a particular danger to people and cause economic and environmental damage. The purpose of the work was to identify the current epizootic situation regarding helminthiasis of commercial animals in the Republic of Sakha (Yakutia). The material for the study was helminthological samples from game animals. The research was carried out during 2022–2023. The hunted animals were brought from the hunting grounds of Yakutia. Animal carcasses or their fragments were subjected to full or partial helminthological examination. The detected helminths were differentiated according to generally accepted determinants. A total of 128 specimens of game animals were studied. During the research, 6 helminthiasis were identified: trichinosis, echinococcosis and 4 taeniasis. Keywords: ECHINOCOCCOSIS, TRICHINELLOSIS, TENIIDOSES, HELMINTHES, HELMINTHISES, WOLVERINE, SABLE, WOLF, FOX, AMERICAN MINK, WEASEL, YAKUTIA

The influence of new feed additives on the biochemical indicators of the blood of the Simmental breed in the conditions of Yakutia

The influence of new feed additives on the biochemical indicators of the blood of the Simmental breed in the conditions of Yakutia

Оптимизация эксплуатации газобаллонного оборудования технологического транспорта АК «АЛРОСА», использующего компримированный природный газ в качестве моторного топлива в условиях Якутии

The paper justifies the relevance of using compressed natural gas as the motor fuel for utility vehicles in conditions of the high north and the Republic of Yakutia. Natural gas as an alternative energy carrier is stated to have a number of advantages over diesel fuel, however, its use in extremely low temperatures, in particular, in Yakutia, is associated with some challenges. A number of technical solutions are proposed to maintain a constant temperature of compressed natural gas contained in the gas cylinders onboard of the utility vehicles. The paper provides a detailed description of the methods to maintain the required temperature of the compressed natural gas in the gas cylinders using heat from the exhaust gases of the combustion engine, as well as by means of flexible electric strip heaters. One of the possible ways to separate heavy hydrocarbons (C5-C7) that negatively affect the performance characteristics of the combustion engines and the operation efficiency of the gas cylinder equipment is described for production of the compressed natural gas for utility vehicles. Technical requirements are determined for rubber products of the gas cylinder equipment that operate at low ambient temperatures. The article suggests the optimal quality characteristics of the frost-resistant rubbers and sealing materials that are most suitable for application in conditions of Yakutia.

Raising of repair heifers of different breeds in the conditions of Yakutia

Raising of repair heifers of different breeds in the conditions of Yakutia

Fruit and seed plumpness, germination and viability of rare plants in Yakutia

Background. With the increasing anthropogenic impact on nature, conservation and renewal of rare and endangered plants in natural cenoses is an urgent problem. Quality assessment, identification of full-fledged plump seeds, and determination of their viability is the way to develop reproduction technologies and provide a possibility of repatriating these species to their natural habitats. Collecting and studying natural flora species in botanical gardens helps to save biological resources of useful species and recommend them for urban landscaping.Materials and methods. X-ray techniques were used to analyze seed quality and viability of rare species in the flora of Yakutia: Adonis sibirica Patrin, Phlojodicarpus sibiricus (Steph. ex Spreng.) Koso-Pol., Iris laevigata Fisch. et C.A. Mey., Iris sanguinea Donn, and Paeonia anomala L. Methods developed for the application of microfocus radiography to fruits and seeds were used in the X-ray analysis.Results. Seed quality was assessed according to guidelines. It was shown that fruits and seeds of the studied species developed under the conditions of Yakutia were full-fledged (plump), but due to the presence of a morphophysiological type of dormancy in them, they could germinate only after a cold or multistage stratification.Conclusion. Assessment of reproductive diaspore quality and viability in rare and endangered plant species of Yakutia will make it possible to develop technologies for increasing their seed germination rates and restoring the natural populations of these species.

The effect of vermicompost on the growth and productivity of pepper in Yakutia

The purpose of this paper is to presents the main results on the study of the effect of different doses of vermicompost on the growth and yield of pepper in the conditions of Yakutia. Experiments on testing fertilizers were carried out on peppers of the “Nezhnost” variety. In variant, there were 10 plants. Experimental scheme: 1 variant - was only with soil; variant 2 in addition to this vermicompost - 100 g; variant 3 vermicompost - 300 g; variant 4 vermicompost - 500 g; variant 5 - the biological product “Baikal EM 1” - 100 ml per well with 100 g semi-rotted manure. The optimal rate of application of vermicompost was determined at which plant growth increased by 20.89%, the total leaf area - by 36.55%. All this together affected the yield of pepper. The second best result was obtained when using the biological product “Baikal EM 1”. At the same time, plant growth indicators improved by 12.18%, the total area of the leaf increased by 24.72%. The data obtained complement the scientific base in the field of northern crop production in terms of the use of vermicomposts from local raw materials.

The effect of vermicompost on the agrochemical properties of soils and the quality of pepper in the conditions of Yakutia

The purpose of this paper is to the results of experiments to study the effect of vermifertilizers on the agrochemical properties of soils and the quality of pepper in Yakutia. Experiments on testing vermifertilizers were carried out on peppers of the “Nezhnost” variety. Experiment scheme: 1 variant - was only with soil; variant 2 in addition to this vermicompost - 100 g; variant 3 vermicompost - 300 g; variant 4 vermicompost - 500 g; variant 5 - the biological product “Baikal EM 1” - 100 ml per well with 100 g semirotted manure. Vitamin C and nitrate content was studied in fruits. During the experiments, it was found that the optimal doses of vermicomposts made it possible to increase the content in soil mixture of nitrogen by 0.11%, P by 16.37%, K by 8.02% and organic matter by 0.34%. At the same time, vitamin C increased in the fruits of pepper and the content of nitrates decreased. The best result was obtained by the variant where 500 g of vermicompost was used, the second-best result was for the biological products “Baikal EM-1”.

Методика оценки эффективности механизации коневодства в условиях экстремально низких температур

The article briefly characterizes the state of horse breeding in the Republic of Sakha (Yakutia). There are special features in breeding of the Yakutian horses. The Yakutian horses stay outdoors all year round and feed mainly on fodder. At present, villagers have started to maximize the number of horses due to the unpretentiousness of their feeding. However, another problem has arisen – due to the sharp increase in horse number there is not enough fodder. To solve this problem, it is proposed to organize mechanical distribution of additional feeding in the form of hay in decentralized areas. When calculating additional feeding norm, the following are taken into account: the required mass of hay, which is determined by the herd and the normative amount of hay per horse; the distance between hay distribution place and storage place, fuel consumption and pasture area. The aim of the study is to develop a methodology for forecasting the level of efficiency of herd horse breeding at the mechanized method of hay delivery and distribution by applying a mathematical dependence. It can help in choosing the location and distance for the organization of horse breeding bases in decentralized areas in the conditions of Yakutia. The calculations for preliminary assessment of proposed mathematical dependence efficiency were carried out. The initial data were taken for the existing horse breeding farm – LLC "Horse Farm Berte". The obtained results of forecast calculations have shown that the efficiency of production increases significantly, on average by 56.5% at mechanization of delivery and distribution of additional feeding in decentralized horse-breeding bases. At the farthest horse farm, located 60 km away from the central farmstead, it is possible to increase the number of animals from 145 to 227.

The influence of coniferous-mineral additive on the milk productivity of fi rst-calf heifers under conditions of Yakutia

The purpose of this work was to carry out the infl uence of a coniferous-mineral feed additive on the milk productivity of fi rst-calf heifers under the conditions of Yakutia. The results of a research to study the influence of the coniferous-mineral feed additive on the milk productivity of Simmental first-calf heifers under the conditions of Yakutia have been presented in the article. The selection and testing of animals for the experiment was carried out according to generally accepted livestock technical methods. The inclusion of experimental feed additives in the rations of animals of the 2nd, 3rd and 4th experimental groups made it possible statistically signifi cant to increase the average daily milk yield of milk by 5,46 %, 5,96 and 5,83 % and the milk yield for the experiment (lactation) in these groups was more by 5,41 %, 5,96 and 5,80 %, respectively, compared to the 1st control group. The use of feed additives from local natural raw materials in the rations of experimental group of animals aff ected the digestibility and absorption of nutrients. Against the background of the use of experimental feed additives, the coeffi cients of nutrient digestibility in animals of the experimental groups increased compared to the 1st control group: for dry matter by 1,47 abs.%, 1,89 and 1,59 abs.%, for organic matter by 1,91 abs.%, 2,66 and 2,45 abs.%, crude protein by 1,49 abs.%, 1,89 and 1,63 abs.%, crude fat by 2,02 abs.% , 2,55 and 2,48 abs.%, crude fi ber by 2,46 abs.%, 3,78 and 3,40 abs.%, nitrogen-free extractive substances by 1,70 abs.%, 2,42 and 2,31 abs.%, respectively, by groups. Thus, the use of coniferous-mineral additive helps to improve the digestibility of nutrients in the body of animals and increase the milk productivity of cattle under the conditions of Yakutia.

The effectiveness of coniferous-mineral and zeolite additives in feeding of fi rst-calf heifers under the conditions of Yakutia

The purpose of the work was to study the complex effect of coniferous-mineral and zeolite additives on the milk productivity of first-calf heifers under the conditions of Yakutia. Data have been presented on the study of the influence of a coniferous-mineral additive in combination with a zeolite additive on the milk productivity of fi rst-calf heifers of Simmental breed under the conditions of Yakutia. The scientific and farm experiment was carried out in three groups; the selection and testing of animals was carried out taking into account generally accepted methods in animal science. The use of the complex of feed additives in the rations of the 2nd and 3rd experimental groups of animals made it possible to increase the milk productivity of fi rst-calf heifers by 9,07 and 7,58 % (P > 0,999), respectively. At the end of the experiment, milk yield in the experimental groups was higher compared to the 1st control group by 9,13 and 7,57 % (P > 0,999). In the milk of heifers of the 2nd and 3rd experimental groups, the proportion of fat content increased by 0,12 and 0,08 abs.%, as well as the milk protein content by 0,10 and 0,08 abs.% compared to the 1st control group. The most complete picture of the changes caused by the inclusion of experimental feed additives in the rations of experimental animals can be traced in terms of nutrient digestibility. In fi rst-calf heifers of the 2nd and 3rd experimental groups, the digestibility coeffi cients of nutrients increased as follow dry matter by 2,78 and 2,23 abs.%, organic matter by 3,01 and 1,42 abs.%, crude protein by 3,10 and 1,99 abs.%, crude fat by 3,46 and 2,72 abs.%, crude fi ber by 3,93 and 0,43 abs.%, nitrogen-free extractive substances by 1,52 and 0,52 abs.%, respectively, compared to the 1st control group. Thus, the integrated use of the studied additives in feeding of first-calf heifers improves the digestibility of nutrients and increases their milk productivity under the conditions of Yakutia.

Biochemical parameters of blood of dairy cows of the Simmental breed when feeding new recipes of feed additives in the conditions of Yakutia

The article presents the results of the influence of new recipes for feed additives made on the basis of local resources on the biochemical parameters of the blood of dairy cows of the Simmental breed in the conditions of Yakutia. Research objectives: 1) study the chemical composition of new recipes for feed additives produced from local resources; 2) determination of the influence of the new formulation of feed additives from local resources on the biochemical parameters of blood in cattle of the Simmental breed. In our experiments, there were no statistically significant changes in the biochemical parameters of blood during the period of the experiments, all the studied blood parameters, both at the beginning and at the end of the experiments, in all groups of animals were within the physiological norms and did not have significant differences between the groups. Consequently, feeding the formulation of feed additives in the composition of Tammi barley, Tuymaada wheat, Pokrovsky and Vilensky oats, dry brewer's grain, Hongurin zeolite, Hongurinobakt probiotic in the diet of cows and heifers of the Simmental breed contributed to the activation of vital processes in the body, assimilation of feed and improved appetite. It should be noted that the cows of the II-experimental group showed a tendency to increase the composition of amino acids. At the beginning of the experiment, the blood lysine content increased by 5.22 mg /% compared with the control and by 5.79 mg /% with the I-experimental group, methionine by 19.67 mg /% and by 10.02 mg /% respectively. The same pattern is observed for the rest of the amino acid composition at the end of the experiment. The data obtained indicate that the optimization of the feed rations of Simmental cows in terms of the content of vitamins of groups A and C through the use of the formulation of protein-vitamin-mineral feed additives had a positive effect on the hematopoietic function.

Milk productivity of cattle of different breed belonging under the conditions of Yakutia

The purpose of the work was to evaluate the milk productivity of imported purebred and locally selected cows of diff erent breed belonging under the economic conditions of the Republic of Sakha (Yakutia). The comparative characteristics of dairy productivity of cattle breeds imported to the republic and animals of local breeding have been considered. The research was carried out on the livestock of breeding cattle of Simmental breed in LLC “Ampaardaakh” in the Vilyuysky ulus, where heifers of Simmental breed were imported from the Novosibirsk region. In the daily ration of lactating cows of the farm, the content of energy feed units and digestible protein was 100,0 and 95,2 % of the standard feeding norm. In the fi rst lactation the milk yield of cows of the imported Simmental breed was 3198,8 kg of milk with a fat content of 3,94 %. A comparison of the productivity of cows of the original Simmental breed showed that they were more productive compared to their herdmates of Red steppe breed, which were imported to the republic from the Altai Territory. Thus, for all analyzed lactations 798, 1610, 1014, 1389 and 938 kg (P > 0,999) more milk was received from cows of Simmental breed imported to the republic than from herdmates of Red steppe breed. Cows of Simmental breed imported to the republic were statistically signifi cantly superior to their herdmates of Simmental breed of local selection for all mature lactations (P > 0,999). Comparison of the fat content of cows of diff erent breeds did not show significant differences. According to the yield of milk fat, imported cows of Simmental and Red steppe breeds had a higher indicator than Simmental cattle of local breeding (P > 0,999).

DIGESTIBILITY AND ABSORPTION OF NUTRIENTS BY YOUNG CATTLE AT INCLUSION OF COMPLEX FEED ADDITIVES INTO THE DIETS IN THE CONDITIONS OF YAKUTIA

It is known that cattle with a high genetic potential of productivity cannot fully realize it in the conditions of Yakutia. This is facilitated by many factors, especially it is necessary to highlight the basic feeds, which are poorly provided with nutrients and minerals. Therefore, the development of technologies and methods to increase productivity of cattle through inclusion of complex feed additives from natural resources in their diets is of scientific and practical importance for the conditions of risky agriculture. In this regard, the goal was to study effect of complex feed additives from local natural raw materials on the digestibility and metabolism of young cattle. The studies used methods generally accepted in zootechnical practice, setting up for the experiment was carried out according to the method (M.F. Tomme, 1969). Experiments were conducted on 3 groups of young cattle. Each group has 10 heads selected by the method of analogues. When analyzing the data on the digestibility and absorption of nutrients, it was found that the animals of the experimental groups digested nutrients better compared to the animals of the control group: dry matter by 1.44% and 0.1%, organic matter by 2.0% and 1.65%, crude protein by 1.68% and 1.16%, crude fat by 2.28% and 1.33%, crude fiber by 2.48% and 2.04%, and nitrogen-free extractives by 1.88% and 1.61%. At the same time, the animals of the experimental groups used nitrogen better compared to the control group by 2,28% and 1,05%. The study of the biochemical composition of animal blood showed that complex feed additives are harmless. Thus, the inclusion of complex feed additives in the diets of young cattle can improve the indicators of digestibility and the degree of use of nutrients in the conditions of Yakutia.

Efficiency of pre-mating enhanced feeding of stallions-producers of the Yakut breed

In the conditions of Yakutia, the duration of enhanced pre-breeding feeding of stallions cannot be shorter than 40-45 days, taking into account 12-15% loss of their autumn live weight. Such feeding, in addition to maintaining the constancy of the mass of the animal, should compensate for the energy costs associated with the processes of rapid preparation of the body of kosyachny stallions for casual activity. On a hay-oat diet enriched with a new mineral and vitamin supplement, the stallions became so strong by the end of the experiment that from the first to the fifth year, the breeding period took place each time at an earlier time compared to the schools of stallions-producers of the control group, kept on a general household diet consisting of hay and oats. Enhanced pre-training feeding of stallions-producers of the Yakut breed is an effective technological method of increasing the production of horse meat. The research carried out made it possible to conduct a production check in LLC "Khorobut", which showed the high efficiency of a new recipe for a feed additive for enriching the main hay-oat ration. Our calculation of the economic efficiency of the new method showed that with the new option from 1000 heads of mares, you can get 8 million 836 thousand rubles of conditional net income.

Characteristics of lactation of cows of Red steppe and Simmental breeds under the economic conditions of Yakutia

In order to increase the gross milk production and increase the number of breeding cattle in the farms in the Republic of Sakha (Yakutia), dairy cattle of Red steppe breed have been imported. Getting into the new climatic and economic conditions of housing and feeding, the body of imported cattle undergoes deep physiological and biochemical changes, goes through the process of adaptation. The purpose of the work was to study the nature of lactation of cows of Red steppe and local Simmental breeds under the economic conditions in Central Yakutia. The intensity and uniformity of lactation during the year has an important role in determining the value of dairy productivity of cows. The ability of cows to give evenly or sharply decreasing milk yields during lactation tends to be inherited, so it should be taken into account in breeding work. The lactation curve provides additional information about the potential of dairy productivity of cows and the impact of feeding, housing and operation conditions on the lactation process. It has been found that the winter ration of lactating cows contained 9,4 EFU and 1139 g of digestible protein, which amounted to 89,9 and 107,0 % of the feeding norm. In the structure of the ration, the proportion of bulky feed occupied 36 %, succulent feed 24 % and concentrated feed 40 %. The sugar-protein ratio was 0,43, which indicated a deficiency in the carbohydrate ration. It was found that under the same conditions of feeding and housing, the cows under study showed a two-vertex level of the lactation curve. In cows of both breeds the peak of the lactation curve occurred during the summer lactation period with the release of animals for summer pasture maintenance. Then, in cows of both breeds the lactation curve began to gradually decrease. Valuable are those animals whose leveled type of lactation and milk yield are housed at a fairly constant level. The indicator of lactation usefulness in cows of Red steppe breed was equal to 68,24 %, in Simmental breed 64,24 %.

Improving Yield of Non-Perennial Crops in the Conditions of Yakutia Using Different Doses of Mineral Fertilizers

Providing sustainable feed supplies is the main condition for the high productivity of the livestock industry. Feed supplies shall meet the needs of farm animals. The application effectiveness of mineral fertilizers is one of the most important factors of technology ensuring the improvement of yield, chemical composition, and nutritional value of feed. The article presents the results of research on the effectiveness of different doses of mineral fertilizers used to improve the yield of non-perennial fodder crops in the conditions of Yakutia. Experiments were held in 2015–2016 in the Moydoch plot of the Khangalassky District. Non-perennial fodder crops were sown on June 1. Sowing was done by drilling with 46 cm inter-row spacing for corn and sunflower, 30 cm for oil radish and sudangrass, and 15 cm for millet. The sowing depth was 4–6 cm for non-perennial fodder crops, and 2–3 cm for oil radish. The experience of application of mineral fertilizers to improve the yield of non-perennial crops has shown to primary affecting factors: the first factor — non-perennial crops variety (corn, sunflower, millet, sudangrass, oil radish), the second factor — mineral fertilizer dose (reference, (NPK)90 kg/ha, (NPK)120 kg/ha of primary nutrient). On average during two years of studies, corn crops have shown the highest fresh yield with mineral fertilizers applied at an NPK120 kg/ha dose of 9.7 t/ha; sunflower — 14.6 t/ha, millet — 6.1 t/ha, oil radish — 12.2 t/ha, and sudangrass — 7.6 t/ha with fertilizers applied at an NPK90 kg/ha dose. NPK120 kg/ha dose of mineral fertilizers ensured high nutrient content in the crops of corn, millet, oil radish, and sudangrass, and NPK90 kg/ha for sunflower. Sunflower and oil radish have shown the best nutritional value from all the studied species of non-perennial fodder crops.

Biological Characteristics of the Cattle Fed with Organomineral Fodder Additives in the Conditions of Yakutia

The evidence-based analysis has revealed that feed stresses are one of the main reasons of a low cattle’s productivity. Scientists justify the need for the study the reason and nature of feed stresses, which is the primary source of animal metabolic disorder. The article presents the results of the studies on the effect of organomineral fodder additives from local natural resources on behavioral reaction and changes of hair-covering hair, which reflect the degree of cattle adaptation to the extreme continental climate. 3 young cattle groups have been formed and divided into equal subgroups for the experiments. The organomineral fodder additives have had a positive effect on feeding behavior, increased the cattle’s appetite and formed a better heat exchange thanks to the hair-covering hair.

Study of blood biochemical parameters of dairy cows of the Simmental breed when feeding new recipes of feed additives in Yakutia

The article presents the results of the influence of new recipes of feed additives, made on the basis of local resources, on the biochemical parameters of the blood of dairy cows of the Simmental breed in the conditions of Yakutia. Research objectives: 1) study the chemical composition of new recipes for feed additives produced from local resources; 2) determination of the influence of the new formulation of feed additives from local resources on the biochemical parameters of blood in cattle of the Simmental breed. In our experiments, there were no statistically significant changes in the biochemical parameters of blood during the period of the experiments, all the studied blood parameters, both at the beginning and at the end of the experiments, in all groups of animals were within the physiological norms and did not have significant differences between the groups. Consequently, feeding the formulation of feed additives in the composition of Tammi barley, Tuymaada wheat, Pokrovsky and Vilensky oats, dry brewer’s grain, Hongurin zeolite, Hongurinobakt probiotic in the diet of cows and heifers of the Simmental breed contributed to the activation of vital processes in the body, assimilation of feed and improved appetite. It should be noted that the cows of the II experimental group showed a tendency to increase the composition of amino acids. At the beginning of the experiment, the blood lysine content increased by 5.22 mg/% compared with the control and by 5.79 mg /% — with the I experimental group, methionine — by 19.67 mg/% and by 10.02 mg/% respectively. The same pattern is observed for the rest of the amino acid composition at the end of the experiment. The data obtained indicate that the optimization of the feed rations of Simmental cows in terms of the content of vitamins of groups A and C through the use of the formulation of protein-vitamin-mineral feed additives had a positive effect on the hematopoietic function. So, if the content of vitamins A and C at the beginning of the experiment was low, then at the end of the experiment the same indicators returned to normal.

Fattening of culled cattle with the use of complex feed additives in the diets in the conditions of Yakutia

The paper presents the results of a study to determine the effectiveness of complex feed additives in the fattening of culled cattle in the conditions of Yakutia. To conduct the experiment, 3 groups of culled cattle were formed. The use of complex feed additives from local natural raw materials in the feeding of culled cattle on fattening allowed increasing the live weight by 1.58% and 0.26%. To determine the safety of experimental feed additives, the clinical parameters of the body of experimental animals were studied. It was found that there was no significant difference between the groups and all the indicators were within the normal range, which in turn proves the harmlessness of complex feed additives. At the end of the experiment, a control slaughter of experimental animals was carried out. When analyzing the data of animal slaughter, it was found that the experimental groups were superior to the control group in terms of parameters: the mass of the steam carcass by 5.53% and 3.61%, the mass of visceral fat by 9.39% and 1.77%, the slaughter mass by 6.07% and 3.87%, the slaughter yield by 2.76% and 2.06%. Next, the organoleptic evaluation of meat products was performed. According to the results of the evaluation of boiled meat, it was found that the experimental groups exceed the control group by 12.92% and 8.33%, and exceed the roasted meat by 11.87% and 8.19%. Thus, complex feed additives showed effectiveness in fattening culled cattle in the conditions of Yakutia.