EFFICIENCY OF USING MIXED FEEDS WITH DIFFERENT ENERGY LEVELS IN FEEDING LARVAE AND FRY RAINBOW TROUT

2020 ◽  
Vol 11 (2) ◽  
pp. 48-55
Author(s):  
V. M. Kondratiuk
Keyword(s):  
Rainbow Trout ◽  
Energy Content ◽  
Energy Levels ◽  
Metabolic Energy ◽  
Feed Consumption ◽  
Control Group ◽  
Experimental Fish ◽  
Growth Intensity ◽  
Mixed Feeds ◽  
Different Levels

The article considers the effectiveness of the use of mixed feeds with different levels of metabolic energy for the cultivation of larvae and fry of rainbow trout. The aim of the experiment was to establish the influence of different levels of energy supply of trout on its performance. For this purpose, five experimental groups were formed by the method of analogues. During the equalization period, the experimental fish consumed feed of the control group. In the main period, the level of metabolic energy in trout feed ranged from 14 to 18 MJ. As a result of the conducted researches it is established that the increase of energy content in compound feed for trout larvae and fry from 16 to 18 MJ contributes to the increase of their weight by 11.1 % (p < 0.05) and growth intensity - by 5.6-14.2 %, while the reduction of energy content to 14 MJ / kg contributes to a probable decrease (p < 0.05) in mass by 11.9%, and a decrease in growth intensity by 6.0-14.7 %. It is proved that the feed consumption per 1 kg of weight gain in trout larvae and fry, which received feed with an energy content of 18 MJ was lower by 5.1 %, and with its content of 14 MJ - 4.8 % higher compared to fish consuming feed with an energy content of 16 MJ / kg. The safety of the experimental fish throughout the experiment was close and ranged from 83.1 to 84.9 %. However, it is most economically feasible to grow trout that consume feed with a nutritional value of 16 MJ of metabolic energy, compared with a decrease or increase of this indicator to 14 or 18 MJ, respectively.

scholarly journals PRODUCTIVITY OF RAINBOW TROUT DEPENDING ON PROTEIN LEVELS IN PRODUCTIVE FEED

2020 ◽  
Vol 11 (4) ◽  
pp. 45-53
Author(s):  
V. M. Kondratiuk
Keyword(s):  
Rainbow Trout ◽  
Protein Content ◽  
Protein Level ◽  
Control Group ◽  
Commercial Fish ◽  
Protein Levels ◽  
Experimental Fish ◽  
Growth Intensity ◽  
Feed Costs ◽  
Different Levels

The article considers the efficiency of using complete feeds with different levels of protein in rearing commercial rainbow trout. The purpose of the experiment was to establish the effect of different protein levels in nutrition of two-year old trout on its productivity. For this purpose, five experimental groups were formed by the method of analogues. During the equalizing period, the experimental fish consumed feed of the control group. In the main period, the protein level in trout feed ranged from 44 to 52 % per 1 kg. As a result of the studies it was established that the increase of protein content in compound feed from 48 to 52 % leads to an increase in the weight of commercial fish by 13.0 % (p < 0.001), an increase in its growth intensity – by 7.4-16.7 %, while the reduction of protein in feed to 44 % leads to a reliable (p < 0.05) reduction in trout weight by 9.4 %, and a decrease in its growth intensity - by 6.5-12.1 %. It is proved that different levels of experimental trout’s protein nutrition have a highly reliable (p < 0.001) effect on the growth of marketable fish - the share of this factor’s influence is 89.8 %. Analysis of the feed costs, proves that using combined feed with 52 % protein for feeding two-year old trout, leads to a decrease in feed costs per 1 kg of weight gain by 5.1 %, whereas reducing this index to 44% causes increase of feed costs by 6.4 % per a unit of product, compared to feeding fish with production feed having the protein content of 48 %. At this, the preservation of experimental fish was high enough and made 94.3 to 96.2 %. In rearing trouts according to the criteria of maximum productivity, it is recommended to feed commercial trout with production combined feeds with the protein level of 52 %, whereas, in production according to the economic optimization criteria, this index should make 48 %.

scholarly journals THE INFLUENCE OF AMINO ACID NUTRITION ON THE PRODUCTIVITY OF RAINBOW TROUT

2020 ◽  
pp. 104-114
Author(s):  
Vadym Kondratiuk
Keyword(s):  
Amino Acids ◽  
Rainbow Trout ◽  
Amino Acid ◽  
Unit Weight ◽  
Control Group ◽  
Economic Optimization ◽  
Experimental Fish ◽  
Growth Intensity ◽  
High Amino Acid ◽  
Different Levels

The article considers the effectiveness of complete feed with different levels of lysine and methionine for growing rainbow trout up to 10 g. The experiment aimed to establish the effect of different levels of amino acid nutrition of trout on its productivity. For this purpose, five experimental groups of this year were formed by the method of analogues. The experiment lasted 45 days and was divided into two periods: equalization (5 days) and main (40 days). During the equalization period, the experimental fish consumed feed of the control group. In the main period, the level of lysine and methionine in experimental feeds for different experimental groups of trout ranged from 2.8 to 3.2 % and from 0.90 to 1.10 %, respectively. As a result of research, it was found that the use of trout weighing up to 10 g of feed with high amino acid nutrition (3.1 % lysine, 1.05 % methionine) in the feeding of this year is accompanied by an increase in their weight by 9.2 % (p <0.05) and growth intensity - by 4.1-9.3 %, compared with analogues who consumed feed with the content of lysine of 3.0% and methionine of 1.0%. The reduction of these amino acids to the levels of 2.8 and 0.9 %, respectively, contributes to a probable decrease (p <0.01) in the weight of fish by 14.1 %, and a decrease in growth intensity by 8.7-17.3 %. It was proved that different levels of amino acid nutrition of young trout significantly (p <0.01) affected the weight of experimental fish. The share of influence of this factor is 61.4 %, which is 22.8 % more than the influence of other factors. In the course of research, it was determined that when growing rainbow trout this year up to 10 g, feeding them compound feeds with lysine and methionine content of 3.1 and 1.05% helps to reduce feed costs per unit weight gain by 12.5 %, compared with using feeds with levels of these amino acids of 2.8 and 0.9 %, respectively. At the same time, the safety of the experimental fish throughout the experiment corresponded to the normative indicators in trout farming and was in the range of 76.0-77.3 %. The analysis of the obtained fish farming results showed that for the production of trout products according to the indicators of maximum productivity and economic optimization criteria it is recommended to use complete feed with a level of 3.1% lysine and 1.05% methionine for feeding rainbow trout.

scholarly journals The influence of energy nutrition on the productivity of rainbow trouts

2020 ◽  
Author(s):  
V. Kondratiuk ◽  
Keyword(s):  
Rainbow Trout ◽  
Weight Gain ◽  
Energy Supply ◽  
Energy Content ◽  
Metabolic Energy ◽  
Daily Weight Gain ◽  
Control Group ◽  
Average Daily Weight Gain ◽  
Experimental Fish ◽  
Main Period

n the conditions of modern fish farming, the issues of product quality management, along with the achievement of high fish productivity, occupy one of the key places in scientific research. This increases the role of the system of scientific support of the technological process of production, in which the feeding of fish is important. Properly balanced feeding, with optimal growing conditions, is a key factor influencing the intensity of fish growth and economic performance of the industry. In a number of works it has been proved that by optimizing the energy supply of rainbow trout, it is possible to ensure a high level of productivity and improve the quality of their products. Thus, the study of the impact of different energy supply of rainbow trout this year in the modern industrial conditions of cold-water fish farms in Ukraine is necessary and relevant. Material and methods of research. Experimental studies on this yearling rainbow trout Oncorhynchus mykiss (Walbaum, 1792) were conducted in the farm "Shipot" Perechyn district of Zakarpattia region. The purpose of the scientific and economic experiment was to establish the influence of different levels of energy supply of this year's trout on their productivity. During the equalization period, the experimental fish consumed feed of the control group. In the main period, the level of metabolic energy in the feed of trout of the experimental groups was regulated by changing the individual components of the feed (using combined mathematical methods to optimize the calculation using the program AgroSoft WinOpti). Feeding rainbow trout this year was carried out 6 times a day, during the day at regular intervals. The required amount of feed was calculated according to the indicators of individual weight of young and the temperature of the environment at the time of feeding. The planting density of the experimental fish at the beginning of the experiment was 200 sp/m2. Growing of young was carried out in ponds with a water level of 1 m. Control catches of experimental trout were performed once every 5 days. Weighing on electronic scales was subjected to 100 individuals from each group. The research results were processed by the method of variation statistics using MS Excel and STATISTICA 7.0 software using built-in statistical functions. Research results and their discussion. It was found that at the end of the experiment (45 days) the highest mass was reached by this year of the 4 and 5 groups, which outperformed the analogues of the control group by 5.5 and 10.4%, respectively (p<0.05). At the same time, this year of the 2 and 3 experimental groups were inferior to the mentioned indicator to control peers by 1.19 and 0.52 g, respectively, or by 10.7 (p<0.05) and 4.7%. The difference between the weight of fish of the 2 and 5 groups, which consumed feed with a metabolic energy content of 15 and 19 MJ, respectively, in this period was 23.5% in favor of the latter. Data from analysis of variance show that different levels of energy nutrition of this year of trout significantly (p<0.001) affected the weight of the experimental fish. The share of influence of this factor is 79.7%, which is almost 4 times higher than the influence of other factors. Calculations of the average daily weight gain of this year's trout showed that during the growing period the nature of their changes depended on the level of metabolic energy in the feed and the corresponding dynamics of fish growth. It should be noted that in general for the main period of the experiment large average daily weight gain was characterized by this year 4- and 5 experimental groups receiving feed with metabolic energy content at the level of 18 and 19 MJ, which by this indicator exceeded the control, respectively 7.0 and 13.2%. Yearlings of trout of the 2nd and 3rd experimental groups, which consumed compound feed with a content of metabolic energy at the level of 15 and 16 MJ, in the main period of the experiment were inferior to the control indicator by 12.7 and 6.1%, respectively. The difference between peers of the 2 and 5 groups in the average daily weight gain for the main period of the experiment was 29.6%. Тhe analysis of feed costs shows that the use of compound feed with a metabolic energy content of 19 MJ (group 5) for the main period of the experiment for feeding this year trout helped to reduce their costs per unit of weight gain compared to fish that consumed feeds with lower energy levels. Thus, the cost of feed per 1 kg of weight gain in this year of the 5 group was 0.794 kg, which is 0.31; 0.86; 0.57 and 0.19 kg less than in the 1, 2, 3 and 4 groups, respectively. It should be noted that the safety of the experimental fish throughout the experiment was quite high and ranged from 74.3 to 76.7%. It can be stated that the increase in nutrient content of feed from 15 (2 group) to 19 MJ (5 group) leads to an increase in ichthyomas during the main period of the experiment by 6.9-37.5%. As a result of different feed costs per unit weight gain of fish, this indicator and its cost per total increase in ichthyomas differed markedly by experimental groups. All this, in the end, affected the unit cost of growth of ichthyomas of this year's trout, was the lowest in fish that consumed food with a nutritional value of 17 MJ (1 group). In particular, according to the mentioned indicator, they outperformed analogues of all other groups, respectively (according to the scheme of the experiment) by 17.0; 19.4; 2.9 and 2.1%. Thus, from an economic point of view, when growing trout this year, they should be fed compound feeds with a metabolic energy level of 17 MJ.

scholarly journals The efficiency of growing rainbow trout (Oncorhynchus mykiss) at different levels of lysine and methionine in feeding

2021 ◽  
pp. 173-181
Author(s):  
V. Kondratiuk
Keyword(s):  
Rainbow Trout ◽  
Amino Acid ◽  
Experimental Studies ◽  
Feed Consumption ◽  
Control Group ◽  
Positive Trend ◽  
Economic Optimization ◽  
Rainbow Trout Oncorhynchus Mykiss ◽  
Significant Difference ◽  
Different Levels

The article considers the issue of the effectiveness of the use of complete feed with different levels of lysine and methionine for the cultivation of rainbow trout. Experimental studies on this yearling rainbow trout є (Walbaum, 1792) were conducted in the farm «Shipot» Perechyn district of Transcarpathian region. The aim of the experiment was to establish the effect of different levels of amino acid nutrition of this yearling trout on its performance. For this purpose, five experimental groups were formed by the method of analogues. The experiment lasted 55 days and was divided into two periods: equalization (5 days) and basic (50 days). During the equalization period, the experimental fish consumed feed of the control group. In the basic period, the level of lysine and methionine in experimental feeds for different experimental groups of trout ranged from 2.7 to 3.1% and from 0.85 to 1.05%, respectively. Trout were fed 6 times a day during the growing season. The required amount of feed was calculated according to the indicators of individual weight of young and the temperature of the environment at the time of feeding. Trout were grown in ponds at a water level of 1 m. Weighing of experimental young trout was performed once every 5 days. It is proved that the reduction of lysine content to 2.7% and methionine to 0.85% in compound feed for this year trout weighing more than 10 g causes a significant (p<0.05) decrease in fish productivity. In particular, it was found that feeding compound feeds with the above amino acid levels helps to reduce trout weight by 10.4% and reduce growth rate by 9.1–19.9% compared to fish fed lysine and methionine at level 2.9 and 0.95%, respectively. The increase in these indicators in the feed for trout this year is accompanied by some positive trend to increase their productivity, but no significant difference has been established. In the course of research it was determined that the feed consumption per 1 kg of weight gain in this year of trout, which received feed with a content of lysine 3.0% and methionine 1.0% were lower by 10.3%, and with the content of these amino acids at level 2.7 and 0.85%, respectively — 17.1% higher compared to fish that consumed food with a content of lysine 2.9 and methionine 0.95%. The use of complete feed with different levels of lysine and methionine for feeding trout this year did not significantly affect the safety of fish, which was in the range of 82.0–83.1%. For the production of trout products in terms of maximum productivity and economic optimization criteria, for feeding trout weighing more than 10 g, it is recommended to use complete feed with a level of lysine — 3.0% and methionine — 1.0%.

scholarly journals REARING RAINBOW TROUT JUVENILE FISH OF THIS YEAR AT DIFFERENT LEVELS OF PROTEIN IN FEED STUFFS

2020 ◽  
Vol 11 (3) ◽  
pp. 34-42
Author(s):  
V. M. Kondratiuk
Keyword(s):  
Rainbow Trout ◽  
Protein Content ◽  
Protein Level ◽  
Juvenile Fish ◽  
Fish Farming ◽  
Control Group ◽  
Protein Levels ◽  
Protein Nutrition ◽  
Experimental Fish ◽  
Growth Intensity

The article considers the efficacy of using complete feed stuffs with different protein levels for rearing rainbow trout juvenile fish up to 10 g. The purpose of the experiment was to establish the influence of different protein nutrition levels on trout productivity indices. For this purpose, five experimental groups of this year juvenile fish were formed by the method of analogues. The control group of fish consumed feed stuffs with the protein level of 52%. During the comparative period, the experimental fish consumed feed of the control group. In the main period, the level of crude protein in trout feed stuffs ranged from 48 to 56% per 1 kg. As a result of the study performed, it was found that the use of feed stuffs with high protein nutrition (56 %) in feeding of this year trout is accompanied by an increase in their weight by 12.3 % (p < 0.01) and their growth intensity - by 7.1-15.7 % , compared to the analogues who consumed feed with the protein level of 52 %. Reduction of this index to the level of 48% contributes to a probable reduction (p < 0.05) in weight by 11.5 %, and a decrease in growth intensity by 5.8-13.8 %. It has been proved that the cost of feed per 1 kg of weight gain in this year trout, which consumed feed stuff with a protein content of 56 %, was lower by 5.5 %, and with its content at 48 % - by 7.4 % higher, compared to fish that consumed feed stuff with the protein content of 52 %. At the same time, the safety of the experimental fish throughout the experiment was compliant with the normative indices in trout farming and was within the range of 75.2-78.1 %. The analysis of the obtained fish farming results showed that the most economically feasible is rearing of this year trout juvenile fish, who consume feed stuff with the protein nutritional value of 52 %, compared to a decrease or increase in this index to 48 and 56 %, respectively.

scholarly journals DIFFERENT LEVELS OF MIXED-LIGANDE COMPLEXES OF ZINC, MANGANESE AND COBALT IN THE FEEDING OF HIGHLYPRODUCTIVE COWS UKRAINIAN BLACK-SPOTTED DAIRY BREED THE FIRST LACTATION AND THEIR IMPACT ON FEED CONSUMPTION, PRODUCTIVITY, REPRODUCTIVE FUNCTION

2021 ◽  
Vol 22 (1) ◽  
pp. 110-119
Author(s):  
Yu. G. Kropyvka ◽  
V. S. Bomko
Keyword(s):  
Hematological Parameters ◽  
Reproductive Function ◽  
Mixed Ligand ◽  
Metabolic Energy ◽  
Feed Consumption ◽  
Mixed Ligand Complexes ◽  
Control Group ◽  
Milk Productivity ◽  
Experimental Group ◽  
Different Levels

The results of studying the influence of different levels of mixed-ligand complexes of Zinc, Manganese and Cobalt in feeding high-lyproductive cows Ukrainian Black-Spotted dairy breed on feed consumption, milk productivity for the first 100 days of lactation, reproductive function and hematological parameters are presented. It was found that on average during the first 100 days of lactation experimental cows consumed 52.6-54.2 kg of feed mixture day and most of it was eaten by cows of the 4th experimental group. The best results in milk productivity (milk yield and fat and protein content) were obtained from cows of the 4th experimental group, which received rations with mixed-ligand complexes of Zinc, Manganese and Cobalt, the concentration of which in 1 kg of DM feed mixture, mg: Zinc - 48.6; Manganese - 48.6 and Cobalt - 0.62. Feed consumption per 1 kg of milk was the lowest in the 4th experimental group and amounted to 7.42 MJ of metabolic energy against 7.74 MJ of metabolic energy in the 1st control group and 7.19-7.48 MJ of metabolic energy in other experimental groups. Different levels of mixed-ligand complexes of Zinc, Manganese and Cobalt in feed mixtures of dry cows in the last 30 days of gestation caused a difference in live weight of calves at birth and had a positive effect on the reproductive functions of experimental cows. 2.1 fertilizations were required for one fruitful insemination of each cow in the 1st control group, 1.8 in the 2nd; 3rd - 1.6; 4th - 1.5 and 5th - 1.7. Analysis of hematological parameters of experimental cows shows that different levels of mixed-ligand complexes of Zinc, Manganese and Cobalt in concentrated feeds have a positive effect on the body of lactating cows, which, in turn, improves their milk productivity and especially reproductive functions.

scholarly journals Rearing larvae and juveniles of rainbow trout with different amino acid nutrition

2020 ◽  
Author(s):  
V. Kondratiuk ◽  
Keyword(s):  
Amino Acids ◽  
Rainbow Trout ◽  
Amino Acid ◽  
Juvenile Fish ◽  
Control Group ◽  
Economic Optimization ◽  
Larvae And Juveniles ◽  
Experimental Fish ◽  
Juvenile Trout ◽  
High Level

The article considers the efficiency of using complete compound feeds with different levels of lysine and methionine in rearing larvae and juveniles of rainbow trout. The purpose of the experiment was to establish the effect of different amino acid levels in nutrition of juvenile trout on its productivity. For this purpose, five experimental groups were formed by the method of analogues. The experiment lasted 35 days and was divided into two periods: equalizing (5 days) and main (30 days). During the equalizing period, the experimental fish consumed feed of the control group. In the main period, the levels of lysine and methionine in experimental feeds for different experimental groups of trout ranged from 2.9 to 3.3% and from 0.95 to 3.15%, respectively. It is proved that increasing the content of lysine and methionine in feed for larvae and juveniles of rainbow trout to the levels of 3.2 and 1.1%, respectively, promotes increase in their weight by 10.7% (p <0.01) and growth intensity - by 6.4-11.1%, while further increase in these amino acids content in the feed reduces the productivity of fish. Polynomial equations for determining the juvenile fish weight at any stage of rearing at a high level of determination for each of the experimental groups have been calculated. It was found that with an increase in the content of lysine and methionine in feed to the levels of 3.2 and 1.1%, respectively, reduces feed costs per 1 kg of weight gain in trout larvae and juveniles by 4.1%, and a further increase in levels of these amino acids to 3.3 and 1.15%, respectively, increase this index by 1.1%. The experimental fish survival ranged from 83.9 to 85.1%. In the production of trout according to the criteria of maximum productivity and to the economic optimization criteria, it is recommended to use complete feed with the level of lysine - 3.2% and methionine - 1.1% for feeding trout larvae and juveniles.

scholarly journals The use of organic concentrate in feeding quail

2020 ◽  
Vol 27 ◽  
pp. 00087
Author(s):  
Devot Ndaiikengurukiye ◽  
Firaya Akhmetzianova ◽  
Aliya Kashaeva ◽  
Delius Sharipov
Keyword(s):  
Food Safety ◽  
Laboratory Experiment ◽  
Feed Intake ◽  
Comparison Method ◽  
Feed Consumption ◽  
Partial Replacement ◽  
Control Group ◽  
Pair Comparison ◽  
Bird Droppings ◽  
Mixed Feeds

The article presents the results of the effect of partial replacement of mixed feeds with organic concentrate based on dry bird droppings (DBD) on the preservation of quail, quantitative and qualitative rates of egg productivity. For the laboratory experiment, 5 experimental groups of Manchurian quail were formed by the analogous pair comparison method. The quail of the control group consumed all-in-one feed (AF), for the quail of the experimental groups (I, II, III, and IV) part of the AF – 10, 15, 20 and 25 % by weight – was replaced with organic concentrate. Results of studies reveal that the introduction of 10 % of organic concentrate into the AF contributed to improved feed intake and livestock safety, increased egg productivity and reduced feed consumption per unit of output. With respect to the indicators of biological usefulness, toxicological and sanitary-epidemiological safety, quail eggs treated with the organic concentrate met the requirements of GOST and TR TS 021/2011 “On food safety”.

Effectiveness of using naked oat in compound feed for quails

2020 ◽  
pp. 4-11
Author(s):  
S. Shpynova ◽  
O. Yadrishchenskaya ◽  
T. Selina ◽  
E. Basova
Keyword(s):  
Energy Content ◽  
Raw Materials ◽  
Live Weight ◽  
Economic Indicators ◽  
Farm Animals ◽  
Feed Consumption ◽  
Control Group ◽  
Meat Production ◽  
Naked Oat ◽  
Experimental Group

The development of industrial poultry farming requires not only the breeding of new highly productive poultry breeds, but also the development of new rearing technologies and the improvement of standardized nutrition. Currently, in the field of feeding farm animals and poultry an important research area is the search for cheaper non-traditional and affordable feed products that can replace part of the grain in the poultry diet. It is very important to use local raw materials. One of these crops is naked oat, which has the highest energy content, the highest concentration of lysine and methionine among all cereals. The purpose of the researches was to determine the eff ectiveness of using naked oat in compound feed for quails. The results of the influence of complete nutrient-balanced compound feeds with naked oat on zootechnical and economic indicators in the rearing of quails have been presented in the article. It has been found that the live weight of quails in the experimental group has been increased by 3,06 %, while the average daily feed consumption has been increased by 1,83 %. Feed expenditures per 1 kg of live weight gain in the experimental group have been lower by 1,31 % due to the absorption of feed nutrients. According to the results of the balance experiment, the digestibility of raw protein has increased by 1,90, fat by 0,41 %, nitrogen-free extractive substances by 2,77 %. When calculating economic indicators, it has been found that the use of naked oat in compound feed for quails allowed to increase the yield of meat and revenue from its sale by 3,75 %. Despite an increase in the total cost of feed consumed by the experimental group by 2,27 %, the profi t has been received by 9,59 % more. The level of profi tability of quail meat production in the experimental group exceeded the indicator of the control group by 3,40 %.

Milk productivity and quality of milk of cows of Black-and-White breed when feeding a balanced feed complex Felucen K 1–2

2020 ◽  
pp. 17-28
Author(s):  
V. Minibaev ◽  
N. Gubaidullin
Keyword(s):  
Crude Protein ◽  
Dry Matter ◽  
Metabolic Energy ◽  
Crude Fiber ◽  
Feed Consumption ◽  
Control Group ◽  
Milk Productivity ◽  
Black And White ◽  
White Breed ◽  
Digestible Protein

The analysis of the literature data shows that there is not enough information on the enrichment of the ration of cows of Black-and-White breed with a balanced feed complex Felucen K 1–2 that has caused the relevance of our researches. The purpose of the research was to increase the productive qualities of cows Black-and-White breed when using different doses of the balanced feed complex Felucen K 1–2 in their ration. The studies have been carried out in the Southern Urals, the optimal dose of use of feed complex Felucen K 1–2 that enhance milk productivity of cows of Black-and-White breed. According to the scheme of the experiment cows of the 2nd, 3rd and 4th experimental groups have been additionally fed to main ration 300 g, 350 and 400 g of the balanced feed complex Felucen K 1–2, consisting of vegetable protein and fat, easily fermentable carbohydrates, high-purity sodium chloride, macronutrients, trace elements, and vitamins. Animals of the 1st group have been served as control and complex Felucen have not been received. Studies have shown that cows of the 1st control group used less dry matter, EFU, metabolic energy, digestible protein, crude protein, crude fiber, and crude fat than their experimental herdmates. Thus, the superiority of cows of the experimental groups over the herdmates of the 1st control group in terms of EFU was 93,1–231,2 kg; metabolic energy – 933,7–2314,7 MJ; dry matter – 9,0–125,8; digestible protein – 8,9–29,7; crude protein – 4,6–18,3; crude fiber-13,1–48,4; crude fat – 11,6–21,0 kg. Animals of all experimental groups in comparison with the control group exceeded in terms of milk yield for 305 days of lactation by 435,2 kg or 6,60 % (P < 0,001); 814,4 kg or 12,34 % (P < 0,001); 684,1 kg or 10,37 % (P < 0,001); for 100 days of lactation – by 98,7 kg or 4,28 % (P < 0,001); 191,0 kg or 8,29 % (P < 0,001) and 167,8 kg or 7,28 % (p<0,001), respectively. The use of Felucen K 1–2 feed complex in the rations of lactating Black-and-White cows has shown its effectiveness, which has affected the feed consumption and effectiveness of their use, hematological indicators, the level of milk productivity and milk quality. From an economic point of view the dose of 350 g of balanced feed complex Felucen To 1–2 per animal per day is more reasonable.

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