Kg Of Live Weight Gain Research Articles

Effects of propolis extract administration on immune parameters, faecal consistency scores, and growth performance of Holstein-Friesian calves.

The purpose of the study was to investigate the effect of Ethanolic Extract of Propolis (EEP) administration on immune parameters, faecal consistency scores, growth performance, and feed efficiency of Holstein Friesian calves. A total of 24 calves were divided into two different groups, control (n = 12) and EEP (n = 12). Both groups consisted of 6 male and 6 female calves. The calves were fed milk amounting to 10% of their birth weight each day until they reached 60days of age. Additionally, they were given starter feed and dry hay once a day. Calves assigned to the EEP group received 4ml of EEP daily. Use of EEP increased (P < 0.05) the serum IgG and IgM levels at 2months of age compared to the control group. EEP also showed efficacy (P < 0.01) in reducing faecal consistency in calves throughout the study. The levels of IL-1β, IL-6, TNF-α and NF-κB expression in calves treated with EEP were lower (P < 0.05) throughout the EEP application period. On the other hand, IGF-1 mRNA transcript levels were (P < 0.01) higher in EEP group calves than in the control group. Furthermore, EEP-fed calves consumed less dry matter for 1kg of live weight gain during the weaning-4months (P < 0.01) and birth-4months (P < 0.05) periods. These results indicate that EEP supplementation, through its immunostimulatory effects, plays a crucial role in the control of neonatal calf diarrhoea. Growth and development as well as IGF-1, which stimulates growth in almost all somatic cells, was also significantly increased by EEP supplementation. The combined effect of the rich bioactive compounds found in EEP appears to have a significant impact on health and well-being, resulting in improved early life performance in dairy calves.

The influence of boars of producers of various breeding on the economic indicators of the use of sows

Relevance. Interbreeding or hybridization is an important factor in increasing pig productivity. As a result of the heterosis effect, the multiplicity of sows increases, the safety of offspring increases, the growth rate of young animals improves, the quality of meat improves and, as a result, the profitability of the pig industry increases.Methods. The paper evaluates the influence of boar producers from the companies PIC, Genesus Genetics and Hypor on the reproductive qualities of sows of a large white breed from the company Hypor. To implement the experiment, according to the principle of pairs of analogues, 3 groups of sows of a large white breed from the company Hypor were formed, 5 heads each. The sows of group 1 were inseminated with the seed of Landrace boars from PIC, group 2 with the seed of Landrace boars from Genesus Genetics, group 3 with the seed of Landrace boars from Hypor.Results. In scientific and economic experience, it was found that the multiplicity of sows of the 3rd group amounted to 13.0 heads, which is 7.7% less than in the 1st and 2nd experimental groups. The number of piglets at the time of weaning in groups 1 and 2 per sow was 12, which is 5.3% more than in group 3. For 1 kg of live weight gain, 9.38 EQ was spent on farrowing in the 3rd group, which is 8.1% more than in the 1st and 8.4% more than in the 2nd experimental group. Based on 1000 rubles of feed consumed, in addition, compared with the 3rd group (5.44 rubles), more live weight gain was obtained in the 1st experimental (by 0.44 rubles) and in the 2nd experimental (by 0.47 rubles) groups.

Productivity of young pigs in rearing when the use of feed additives ActivSorbent and PolyActiv as feed adsorbents of mycotoxins

Intensification of pig farming is directly related to the need to provide pig-producing farms with their own feed. Modern conditions of industrial pig farming impose increased requirements on the organization of complete feeding of pigs based on the use of high-quality feed, feed and biologically active additives. The purpose of the research was to study the productivity of young pigs during rearing when use feed additives ActiveSorben and PolyActive adsorbents of mycotoxins in feed. Research to identify the optimal dosage of mycotoxin adsorbents of feed ActiveSorbent and PolyActive and their effect on the metabolism and productive indicators of young pigs was carried out on fi rst-generation hybrid piglets (Large White × Landrace) during rearing, in the production conditions of the pig-breeding complex of Tavla LLC in the Kochkurovsky district of the Republic of Mordovia with a capacity of 12,000 heads per year. It has been found according to the results of industrial testing of the feed mycotoxin adsorbents ActiveSorbent and PolyActive that their use in doses of 1.750 kg/t of compound feed reduced the costs of producing 1 kg of live weight gain by 10.31 and 8.51 rubles, respectively. The level of profi tability in the experimental groups increased compared to the control group when using the additive ActiveSorbent by 18.93 abs.% and PolyActive by 15.24 abs.%. Thus, the inclusion of feed additives ActiveSorbent and PolyActive of feed mycotoxin adsorbents in the diet of rearing piglets under industrial pig farming conditions when recalculated for the resulting products contributes to increased productivity, reduced cost of production and an increase in the level of production profitability.

Infl uence of various methods of rearing on the productivity and quality of meat of broiler chickens

Housing poultry by using intensive rearing methods often leads to stress, metabolic disorders in its body, and reduced productivity and meat quality. Therefore, along with traditional technologies, free-range technology of housing of meat chickens has recently attracted increasing interest. The purpose of the work was to study the infl uence of various rearing methods on the productivity and meat quality of meat chickens, as well as to provide an experimental justifi cation for rational rearing periods and stocking density of chickens in free-range conditions. The productivity, meat qualities, and meat quality of chickens of the new domestic cross Smena 9 were studied under free-range conditions in comparison with cage and floor poultry rearing methods. The rational rearing period and stocking density of meat chickens using free-range areas, as well as the animal science and economic effi ciency of free-range rearing of meat chickens of the cross Smena 9 were determined. The highest average live weight of the cross Smena 9 chickens was achieved with the free-range technology of rearing at the age of 56 days and amounted to 3960.3 g, which was by 3.02 and 3.36 % higher compared to cage and fl oor keeping of the chickens. Feed costs per 1 kg of live weight gain in chickens reared to the age of 56 days were 9.21 % lower compared to chickens reared to the age of 63 days. When fattening chickens to 56 days, the highest yield of edible parts in the carcass was obtained 82.60 %, including muscles 64.95 % and higher taste qualities of poultry meat. When rearing chickens at a stocking density of 12 and 11 heads/m2, the live weight of the chickens was 5.52 (p ≤ 0.05) and 5.61 % (p ≤ 0.05) higher, compared to chickens reared at a stocking density of 15 heads/m2. According to animal science indicators and economic efficiency, the best chickens were reared at a stocking density of 12 heads/m2, and as a result, the highest productivity index was obtained 359.3 units.

ЭФФЕКТИВНОСТЬ БИОКОНВЕРСИИ ПИТАТЕЛЬНЫХ ВЕЩЕСТВ И ЭНЕРГИИ КОРМА В МЯСНУЮ ПРОДУКЦИЮ БАРАНЧИКАМИ РАЗНОГО ГЕНОТИПА

The purpose of the study is to determine the influence of the genotype of rams on the efficiency of transformation of protein and energy of the feed ration by purebred young animals of the Romanov breed (Group I), its crosses with the Edilbaevskaya breed of the first generation 1/2 Romanovskaya × 1/2 Edilbay (II group) and the second generation 1/4 Romanovskaya × 1/4 Edilbay – ( Group III) in food protein and energy of meat products. Crossbreeds of groups II and III were distinguished by less crude protein consumption per 1 kg of live weight gain than peers of group I – by 15.9 (1.62 %) and 33.5 g (3.48 %) and energy by 3.64 (4.23 %) and 4.89 mJ (5.77 %). An advantage was noted for crosses of groups II and III in terms of the weight of edible parts of the carcass, which amounted to 5.05 (36.89 %) and 6.79 kg (49.60 %). Purebred rams of group I were inferior to crossbred young animals of groups II and III in terms of protein content in the edible part of the carcass by 0.86 (31.62 %) and 1.15 kg (42.28 %), respectively, extractable fat – by 0.82 (66.13 %) and 1.25 kg (100.8 %), energy – by 46.54 (49.01 %) and 68.30 mJ (71.93 %). All this determined the advantage of crossbred rams of groups II and III in terms of the yield of nutrients, edible parts of the carcass and energy per 1 kg of pre-slaughter live weight. For protein, this advantage was 2.49 (3.53 %) and 4.32 g (6.12 %), extractable fat – 9.86 (30.65 %) and 16.01 g (49.77 %), energy – 0.59 (23.98 %) and 0.70 mJ (28.45 %). The advantage of crossbred young animals of groups II and III in terms of the protein bioconversion coefficient was established, which was 0.26 and 0.65 % for protein, 0.21 and 0.40 % for energy, respectively. The leading position in all indicators was noted for crossbreeds of the second generation of group III.

Studying the efficiency of Gaprin application in sterlet farming

In the course of the experiment, the influence of new feed additives created on the basis of Gaprin and representing biomass of inactivated cell culture of non-pathogenic methane-oxidizing yeasts or bacteria on sturgeon fish productivity indicators was studied. The research was carried out in the Krasnodar Territory on sterlet fingerlings. The experiment lasted for 60 days. According to the scheme of the experiment, the 1st (control) group of fish received complete feeds without additives, i.e. containing 100.0% fish meal. In group 2 feeding, 50.0% fishmeal was replaced with 50.0% Gaprin. Group 3 diet contained 25.0% fishmeal and 75.0% Gaprin. In the feed for group 4, fish meal and Gaprin were in the ratio of 75/25%. In Group 5, fish meal was completely replaced by Gaprin, in this case the amount of additive was 10.5 kg. Sterlet fingerlings from Group 6 received feed with 10.0% Gaprin. The initial live weight in all groups was similar at 30 g. However, the inclusion of Gaprin in the diet by reducing the amount of fish meal contributed to an increase in the final live weight of sterlets in the experimental groups by 4.4–19.4% compared to the control. The exceptions were groups 5 and 6, which received 100.0 and 90.0% Gaprin instead of fishmeal. Final live weight in these groups was lower by 2.3 and 0.9%, respectively. Feed costs per 1 kg of live weight gain in the groups with partial or complete replacement of fish meal were lower relative to the 1st group (from 7.0 to 17.9%,).Inclusion of Gaprin in complete feeds contributed to the increase in profit from 553.00 to 1785.00 rubles.

Productive qualities of broiler chickens at different levels of soluble fraction of fish waste hydrolyzate in feed

The growth and development of broiler chickens at different levels of the soluble fraction of fish waste hydrolyzate in mixed fodder was studied. The processing of commercial fish is accompanied by the formation of secondary resources, the scope of practical application of which is quite wide (fish proteins are a unique natural material used in various industries, but not fully utilized. Wastes resulting from fish processing are a source of valuable nutritional and biologically active substances, and thus serve as raw materials for various products, including dietary supplements. In order to determine the optimal rate of introduction of the soluble fraction of fish waste hydrolyzate into broiler chicken feed, a scientific and economic experiment was conducted that lasted 42 days. The research was conducted on broiler chickens of the Cobb-500 cross. The difference in the feeding of the experimental groups was that broiler chickens of the first (control) group received complete feed, which corresponded to the nutritional standards in all periods, and the additional introduction of a soluble fraction of fish waste hydrolyzate was: The 2nd experimental group received 0.2 % of the feed additive; poultry of the 3rd and 4th experimental groups consumed feed containing 0.4 and 0.6 % of the experimental additive. It was found that an increase in the content of the soluble fraction of fish waste hydrolyzate in the diet by 0.6 % contributes to an increase in live weight of chickens by 266 g, or 10.25 %, and a decrease in feed costs per 1 kg of live weight gain by 3.8 % compared to the control. It was found that during the growing period, broiler chickens of the 4th group had the highest absolute live weight gain of 2823.8 g, which is 2.63 %, 8.32 % and 10.36 % higher than in the 3rd, 2nd experimental and control groups. The use of feed with a soluble fraction of fish waste hydrolyzate in the feed with a content of 0.6 % increased the average daily weight gain for the entire period of the experiment by 7 g, or 11.63 %, and absolute weight gain by 265.2 g, or 10.36 %, respectively.

Evaluation of rabbit young stock grown using starter compound feed by growth intensity and functional state of the body

The possibility of improving the technology of raising suckling and weaned kits aged 18–42 days, which would involve the use of starter compound feed, was studied in the conducted research. The object of the research was the livestock of rabbits of the Poltava Silver breed. The research was conducted at the experimental rabbitry of the Cherkasy Research Station of Bioresources. The experiments were carried out in a closed capital ventilated premises using metal cages for keeping suckling does with litters measuring 95×39 cm, equipped with feeders and automatic waterers. The cages intended for feeding suckling kits with starter compound feed were slightly modified: an additional feeder was installed in the compartment for young stock, and only the kits had the possibility of free movement between different compartments of the cage. By the method of group analogs from nests of suckling 18-day-old kits, two subgroups of 25 heads each were formed. The preparatory period lasted 5 days, and the main one – 19 days (raising up to 42 days of age, with weaning at 35). Suckling does of both groups were fed a complete granulated feed PK 91 (for adult rabbits and does aged 90 days and older “Lux”) produced by LLC “KreMix”. For the animals of the experimental group, a recipe for additional complete granulated starter compound feed was developed, produced at a farm in the village of Tashlik, Smila district. Thus, both starter compound feed and feed for feeding suckling does were used for the kits of the experimental group, and for the analogs of the control group - the same feed as for the does. The conducted research revealed that the use of complete granulated starter compound feed for feeding young rabbits aged 18–42 days as an additional feed, developed according to international standards, did not lead to an increase in the total cost of feed per 1 kg of live weight gain, but on the contrary, reduced it. Due to the increase in the retention rate of the replacement young stock in the experimental group by 8.0 % provided its realization for further breeding per 100 heads, contributed to additional income of 1015.28 UAH. (market realization price – 140.00 UAH/kg of live weight). Based on the conducted research, an information database of growth and development indicators of replacement young stock of rabbits when fed starter compound feed at the age of 18–42 days has been created.

Resistance of Kalmyk cattle breed to high ambient temperatures of the highlands of the North Caucasus

The purpose of the research is to establish indicators of heat resistance and study the growth of Kalmyk cattle youth in different natural, climatic, organizational and technological conditions in the highlands of the Kabardino-Balkarian Republic. The investigations were carried out in LLC «Dargan» (Chereksky district, in village Gerpegezh) and LLC «Malka» (Zolsky district, in village Malka) of the Kabardino-Balkarian Republic of the Kalmyk breed bulls during the period of grazing (from 7 to 12 months). The highest values of the heat resistance index and tolerance coefficient were recorded at the beginning of the grazing period in species of both farms, when the ambient temperature during the day was within comfortable limits for the species as a whole. Subsequently, the heat resistance indicators were decreased by the middle of the analyzed period of detention, which is explained by the temperature stress for the body of the experimental animals. However, temperature conditions and resistance were restored to their original values for them by the end of the experiment. Inter-farm divergences in growth intensity in age period of 7-9 months were 31 g (P&lt;0.95), 9-12 months - 65 g (P&lt;0.999) and for the entire period - 52 g (P&lt;0.99). The largest absolute increase in live weight over the analyzed period was distinguished by bulls from LLC «Malka», which were under other conditions, recorded the lowest feed costs per 1 kg of live weight gain. Thus, the differences in the cost of energy feed units in comparison with individuals from «Dargan» LLC were 0.18, digestible protein was 11 g.

The use of lupin variety “Deco” in the feeding of pigs

The purpose of this research was to study the effect on the digestibility of dietary nutrients and livestock parameters of young pigs of different doses of an alternative feed source such as lupine grain of the variety “Deco” instead of full-fat soybeans in the composition of compound feed. The studies were carried out on young pigs of DanBred genetics under conditions of a pig-breeding enterprise. Clinically healthy pigs were selected for the research. The method of analogues was used when selecting animals into groups, taking into account age, live weight, sex, etc. Four groups of animals were formed to conduct the experiment. There were 48 pigs in each group. The duration of the experiment was 124 days. The control group of young pigs was fed compound feed with full-fat soybeans. Herdmates in the 1st experimental group were fed compound feed with 50 % of full-fat soybeans replaced with the variety “Deco” lupine, in the 2nd experimental group with 75 %, in the 3rd experimental group full-fat soybeans were completely replaced with lupine grain. In relation to full-fat soybeans lupine grain of the variety “Deco” contained more dry matter by 0,08 abs.%, crude protein by 2,45 abs.%, crude ash by 0,35 abs.%, nitrogen-free extractive substances by 2,38 abs.%, the studied amino acids by 1,75 abs.%. Partial or complete replacement of full-fat soybeans in the compound feed with the lupine variety “Deco” led to the increase in the digestibility of nutrients in the body of young pigs with the following results: dry matter was digested more by 0,41–1,15 abs.%, organic matter by 0,23–1,00 abs.%, crude fat by 0,17–1,52 abs.%, crude protein by 0,92–1,83 abs.%, crude fi ber by 2,04–3,21 abs.%, nitrogenfree extractive substances by 0,12–0,43 abs.% compared to the pigs of the control group. The use of nitrogen, calcium and phosphorus taken with compound feed in animals was greater in relation to analogues from the control group by 0,76–1,61 abs.%, 0,72–1,61 and 0,19–1,26 abs.%, respectively. At the age of 180 days, the live weight of pigs in the control group was 131,04 kg, and in the experimental groups it was 2,82–3,96 kg higher. There was the decrease in feed expenditures per 1 kg of live weight gain in animals of the experimental groups by 2,57–3,49 % in comparison with control analogues. In order to expand the feed supply in pig farming, increase the nutritional value of compound feed and reduce their cost, as well as increase the meat productivity of pigs we recommend input alkaloid-free lupine of the variety “Deco” into compound feed.

EFFECT OF DIFFERENT FEEDING LEVELS AND RATION STRUCTURE ON INCREASING SHEEP PRODUCTIVITY

The article considers the process of identifying different amounts of cleavable and non-cleavable basic food in the scars of protein fractions of protein in the south-east of Kazakhstan. The main factors influencing feed intake during fattening are the physical form of the feed, the energy concentration in the dry matter of the diet and the live weight of the sheep. When feeding granulated feed mixtures, feed losses in the form of scraps are reduced by 20-25%, dry matter consumption increases by 10-15% and amounts to 45-50 g per 1 kg of live weight, which allows increasing the total consumption of nutrients by 25-30%, obtaining more meat production by 26.20%, lamb wool by 15.65%, reducing feed costs per 1 kg of gain by 2 feed units or 30%. The proteins most intensively broken down in the rumen of sheep are those of clover and alfalfa grass (83.5-84.6%), grass from foothill and mountain pastures (70.0-71.7%), alfalfa hay and haylage (76.6-81.3%), corn silage (78.6%), and oat and barley grain (84.0-85.3%). Intensive fattening of fat-tailed meat-and-fat sheep using our detailed feeding standards, feed mixtures, and compound feeds ensures an average daily gain of 200-230 g, a carcass weight at slaughter of 23-26 kg, a meat-pulp yield of 76-78% with an expenditure of 6.0-7.0 feed units, 78-80 MJ of exchange energy per 1 kg of live weight gain.

INFLUENCE OF COUMARIN ON PRODUCTIVITY, IMMUNITY AND ANTIOXIDANT STATUS OF HEALTHY BROILERS

Background. Coumarins are natural compounds (secondary metabolites of plant origin) that have a wide range of biological activity, mainly due to their ability to interact with various enzymes and receptors in living organisms. The relevance of their use in feeding poultry is obvious, in view of the active search for alternatives to feed antibiotics.&#x0D; The aim of the study was to evaluate the effect of coumarin on the productivity and antioxidant status of broiler chickens.&#x0D; Materials and methods. Objects of study: broiler chickens of the Arbor Acres cross, 7-hydroxycoumarin. The experiment was carried out on 180 heads of 7-day-old broiler chickens (n=45). Control - the main diet (OR), 1 experimental – OR + coumarin (at a dose of 1 mg/kg of feed/day, 2 experimental – OR + coumarin at a dose of 2 mg/kg of feed / day, 3 experimental – OR + coumarin in at a dose of 3 mg/kg feed/day. Hematological parameters (number and type of leukocytes) were taken into account on an automatic hematological analyzer URIT-2900 Vet Plus (URIT Medical Electronic Group Co., Ltd, China). Biochemical analysis of blood serum was performed on an automatic biochemical analyzer CS-T240 (Dirui Industrial Co., Ltd, China).&#x0D; Results. The inclusion of 7-hydroxycoumarin in the diet contributed to an increase in live weight in the experimental groups by 8,6–19,4%; (by 9,2–21,1%), slaughter yield (up to 4,76%), against the background of a decrease in feed consumption per 1 kg of live weight gain (by 3,5–15,7%). showed a decrease in total protein, albumin, ALT (groups 1 and 2 (p≤0,05)), bilirubin (by 38,3–68,6%), cholesterol (in group 3 by 16,4% (p≤0,05)), triglycerides (groups 1 and 2, p≤0,05), urea (41,8–65,1%; p≤0,05), against the background of elevated iron levels (groups 1 and 2, p≤0,05). Depending on the dose of 7-hydroxycoumarin, a decrease in the number of leukocytes (group 1, p≤0,05), neutrophils (groups 1 and 2, p≤0,05), monocytes, eosinophils and basophils (p≤ 0,05). Antioxidant indicators were characterized by a decrease in the level of malondialdehyde (by 63,7–77,3%), superoxide dismutase activity (22,4–71,5%) and an increase in catalase activity (by 24,3–46,1%).&#x0D; Conclusion. Thus, the inclusion of 7-hydroxycoumarin (2 mg/kg feed/day) in the diet contributed to an increase in the live weight of broiler chickens, feed intake, slaughter yield, against the background of a lower feed consumption per 1 kg of live weight gain; had a positive effect on the parameters of the liver (ALT, total bilirubin), lipid and nitrogen metabolism (triglycerides, urea), the antioxidant status of the body of broiler chickens.

Influence of probiotics on growth dynamics and blood parameters of Zaanen goats

Relevance. In the prevention and treatment of gastrointestinal diseases in the rearing of young animals, the restoration of intestinal biocenosis with the use of probiotics — bacterial preparations from live microbial cultures is of great importance.The purpose of the research is to study the effect of probiotic feed additives Klyuver Pro and BeneFIT Basic on growth dynamics, feed costs and blood parameters of Saanen goats.Methods. The studies were carried out at LLC «Lukoz Saba» of the Sabinsky district of the Republic of Tatarstan. The object of the study is the kids of the Saanen breed at the age of seven days. Scientific and economic experience was carried out according to the method of analogues. The chemical composition and nutritional value of feed, the dynamics of changes in live weight, the morphological and biochemical parameters of the blood of goats were studied. Statistical data processing was carried out using Microsoft Excel. A difference of p ≥ 0.05 was considered significant.Results. Probiotic feed additives Kluver Pro and BeneFIT Basic activate metabolic processes in the body of kids, increase the digestibility and assimilation of feed, which has a positive effect on the growth and development of animals, and reduce feed costs. The live weight of goats treated with probiotics increased (compared with the control) by 7.7% (p ≥ 0.05) and 3.6%. Feed costs decreased per 1 kg of live weight gain decreased by 13.6% and 10.1%.In the blood of animals treated with probiotics, there was an increase in hematocrit, hemoglobin and erythrocytes. In animals of the second group, these indicators increased by 17.4%, 31.7 g/l (39.3%) (p ≥ 0.001) and 4.45 ˟ 1012/l (77.1%) (p ≥ 0.001), in animals the third group — respectively, by 7.5%, 7.7 g / l (9.5%) (p ≥ 0.001) and 1.63 ˟ 1012/l (28.2%), as well as a significant decrease in ESR — by 0, 37 mm/g and 0.18 mm/g (p ≥ 0.001), calcium content by 20% and 24.2% (p ≥ 0.05).

Infl uence of sorgo on the productivity of meat quails

One of the trends in meat production is to reduce feed expenditures per unit of live weight gain while simultaneously increasing the growth rate, slaughter yield, muscle yield and reducing the content of internal fat. Reducing the fat content in the carcasses of quails will improve the feed conversion and increase the yield of muscle tissue. One of the ways to reduce the prime-cost of poultry products is the introduction of non-traditional promising feed ingredients. The purpose of the research was to study the use of sorghum grain in feeding quails of meat productivity. The results of the infl uence of complete nutrient-balanced compound feed with the introduction of 10 % sorghum on livestock and economic indicators in the rearing of meat quails have been presented the article. It was found that the live weight of quails in the experimental group increased by 0,46 %, while the average daily feed intake decreased by 4,39 %. Feed expenditures per 1 kg of live weight gain of the experimental group were 5,08 % lower due to better assimilation of feed nutrients. It was found according to the results of physiological (balance) experiment that the digestibility of crude protein increased by 6,92 abs.%, crude fat by 0,73 abs.%, crude fi ber by 0,82 abs.%. It was found when calculating economic indicators that the use of sorghum in compound feed for quails allowed to increase the yield of meat and revenue from its sale by 5,81 %. Despite the increase in the total cost of the feed consumed by the experimental group by 1,43 %, the profi t was received by 58,14 % more. The prime-cost of production of 1 kg of quail meat in the experimental group decreased by 6,20 % compared with the control group.

The effectiveness of the use of the feed additive “Butaselmevit-plus” as part of compound feed for young pigs

The results of the production approval fully confirmed the high efficiency of introducing the feed additive “Butaselmevit-plus” into the compound feed for piglets. It was established that at the end of the piglet rearing period (at the age of 75 days), the average weight of one head in the experimental group was 32.6 kg, which is 1.1 kilograms or 3.5% higher (P &lt; 0.05). Then their peers from the control group. During the period of rearing, the absolute increase in body weight in young animals of the experimental group was higher by 1.2 kg, or by 4.7 %, and the average daily weight gain by 21.8 g, or by 4.7 %, compared to similar indicators in piglets of the control group, and were 26.5 kg and 481.8 g, respectively. Among the numerous indicators determining the economic efficiency of production, the cost per unit of production is considered the most important. One of the reserves for reducing the cost of pig production is increasing young animals' productivity and preservation. The above results of the production inspection convincingly prove that using the feed additive “Butaselmevit-plus” in compound feed for piglets at the rate of 100 mg/kg of body weight increases their product qualities and, as a result, improves economic indicators. In the experimental group, the cost of 1 kg of live weight of piglets during rearing decreased by UAH 0.57, or 3.0 %, compared to the young of the control group and amounted to UAH 18.25. The cost of 1 kg of live weight gain in control and experimental groups was slightly higher (23.44 and 22.46 UAH, respectively), and the difference in favor of the latter was 4.2 %. The decrease in the unit cost of production in the experimental group was due to the increase in body weight and the survival of young pigs during the rearing period. The economic effect of using the feed additive “Butaselmevit-plus” as part of compound feed, calculated per 1 head of young pigs, was UAH 25.97 at the prices set for feed and feed additive in 2019. To increase the adaptability of piglets at an early age when weaning from the sow and to prevent the development of oxidative stress, for further maintenance during the period of rearing and fattening, it is recommended to use the feed additive “Butaselmevit-plus” in the amount of 100 mg/kg of body weight per day together with concentrates diet in the period from 21 to 40 days of age.

Productive qualities of bull-calves of beef and joint breeds

This article presents the results of a study on the search and development of the most optimal breed for beef production and growing technology using fattening and fattening in the conditions of the Karachay-Cherkess Republic. An experiment was conducted at Hammer LLC, the object of which was the bulls of the Aberdeen-Angus, Swiss and Kalmyk breeds bred in the region. From birth to 18 months of age, bull-calves of all breeds were distinguished by high payment for feed by increments. They spent 5.4-6 feed units per kilogram of growth. The feed fed to one bull for 18 months of rearing contained 2918-3235 feed. units and 295-325 kg of digestible protein. Live weight at the age of 18 months in bulls of the Aberdeen-Angus breed was 589.4 kg, which is more by 28.4 and 68.4 kg than in bulls of Swiss and Kalmyk breeds, respectively. The slaughter yield in young animals of all breeds was high from 60.1 to 61.6%. However, heavier carcasses were obtained from bulls of the Aberdeen-Angus breed, which is higher than that of Swiss and Kalmyk bulls by 6% and 12.9% at 18 months, respectively. The calorie content of carcass pulp in animals of all breeds was quite high (2274-2346 kcal at the age of 15.5 months and 2470-2700 kcal at 18 months).When determining the economic efficiency of growing bulls up to 15.5 and 18 months of age, it was revealed that the highest payment for feed was shown by animals of the Aberdeen Angus breed, which spent 11.1 per 1 kg of live weight gain for 15.5 and 18 months of growing, respectively.and 10.7 feed units. At the same time, the Aberdeen Angus breed had the minimum production costs per unit of production. In bulls at the age of 15.5 months, they were 5.3 and 17.0% lower than in Swiss and Kalmyk cattle, and at the age of 18 months, they were 11.1 and 20.3% lower, respectively.

Fattening and meat qualities of hybrids from terminal boars of foreign selection

The goal is to determine the efficiency of using terminal boars of the Optimus and Alba lines in hybridization systems. Methods. The research was carried out in the conditions of LLC "Agro-industrial company" of the Zaporizhzhia region. The object of the study were hybrid pigs obtained as a result of the combination of purebred and crossbred sows of different breeds with boars of the Optimus and Alba lines. The fattening and meat qualities of experimental pigs were determined according to the following indexes: average daily gain during the period of control fattening, g; age of reaching 100 kg live weight, days; feed consumption per 1 kg of live weight gain, feed. unit; thickness of lard at the level of 6–7 vertebrae, mm. A comprehensive evaluation of young pigs of the experimental groups for fattening and meat qualities was carried out based on the calculation of the Tyler index. The results. It was determined that, with the exception of lard thickness, descendants of boars of the Alba line prevailed in most productive traits, where, for example, the average daily growth of hybrid young pigs from ♀Durok×♂Landrace sows was at the level of 910 g with an evaluation index of 262.4 units. This applies to the combination of Alba boars with sows ♀Landrace×♂ Large White, where the average daily gains of the hybrids amounted to 894.0 g, and the age of reaching a live weight of 100 kg was 171.8 days, with an evaluation index of 259.3 units. (The average index for all combinations is 249.9 units). Combinations with the Optimus line slightly lagged behind Alba boars, especially in combinations with sows ♀Landras×♂ Large White, ♀Landras×♂Optimus, where the average daily gains were 753.1 and 763.1 g, respectively, with indices of 219.7 and 295.4 units However, the Optimus terminal line showed high results of the fattening qualities of the offspring with sows of the combination ♀Large White ×♂Landrace (average daily gains of 872.0 g, age of reaching 100 kg weight – 177 days with an evaluation index of 246.8 units). Taking into account the fact that sows of the combination ♀ Large White ×♂Landrace (F1) are most common in commodity farms of Ukraine, including in industrial complexes, the use of boars of the Optimus line should also be considered promising and should be widely used in hybridization. Conclusions. It was established that when sows of different origin were combined with boars of two terminal lines, higher results were obtained in the offspring of Alba boars, analogous groups by maternal origin prevailed in the offspring of Optimus line boars by 8.3–18.7 % in terms of average daily growth and by 1 .5–7.3 % by the age of reaching a live weight of 100 kg. The best result when using boars of the Optimus terminal line was obtained when they were combined with sows ♀LW×♂L (F1), the average daily gains were higher by 15.4–3.8 % compared to other variants of their combination with sows. Considering that ♀LW×♂L (F1) sows are the most common in commercial pig farming of Ukraine, the use of boars of the Optimus line should be recommended as promising in hybridization systems in which ♀LW×♂L (F1) sows are used. Key words: selection, hybridization, terminal boars, evaluation index, boar lines, fattening qualities.

BIOLOGICAL VALUE AND TECHNOLOGICAL INDICATORS OF MEAT IN BEEF BULLS OF DIFFERENT GENOTYPES IN THE CONDITIONS OF THE AGRICULTURAL HOLDING "BAISERKE-AGRO"

Annotation The most important biological feature of beef bulls is their ability to consume and process a large amount of cheap low-nutritional feed, including waste from crop production and the food industry, into valuable food products for humans. The meat products and leather raw materials obtained at the same time are of high quality. The development of new directions in breeding, for example, early prediction of the productive qualities of livestock, contributed to a greater opportunity for selection, a reduction in the interval between generations and more effective breeding of cattle in the meat direction of productivity. We need animals that have requirements that provide for obtaining the most "economical animals", combining in their genotype the strength of the constitution and high productivity, good fattening and meat qualities, resistance and immunity to stress, having good adaptive abilities to living conditions and economic use. In other words, it is necessary to create animals with high productivity and well adapted to intensive use. The aim of the research was to improve and optimize breeding methods to increase the rate of genetic progress of different beef breeds of cattle. Based on the interaction of genotypes, to determine effective methods for improving the breeding and productive qualities of meat breeds of different genotypes to increase the production of high-quality beef. This article presents the results of studies of meat productivity of beef bulls of different genotypes in the conditions of the agricultural holding "Baiserke-Agro". According to the results of the research, the quality of carcasses and slaughter indicators, the morphological composition of carcasses and individual anatomical parts, the chemical composition of meat and the energy value of raw fat were established. The conducted studies contributed to the fullest realization of the genetic potential of the productivity of the Aberdeen Angus, Hereford and Kazakh white-headed breeds, as a result, an additional reserve for obtaining high-quality beef was revealed. The proposed methods and techniques of organizing the breeding process allowed to create highly productive beef cattle in the conditions of the agricultural holding "Bayserke-Agro", which contributed to reducing the cost of 1 kg of live weight gain by 5-8% and obtaining additional profit for 1 head by 14-16%. &nbsp; &nbsp

Productive qualities of calves when fed with polymicrobiological feed additive "Yarosil"

In an experiment conducted at JSC "Plemzavod named after Dzerzhinsky" Yaroslavl district of the Yaroslavl region, the effect of feeding the polymicrobiological feed additive "Yarosil" to fattening bulls from 5 days of age to a year and its prolonged action up to 18 months of age was studied . It was established that the feed additive "Yarosil" had a positive effect on the body of bulls. This was expressed in the activation of feed intake, acceleration of growth, live weight gain, reduction in morbidity and increase in safety. Feeding the feed additive "Yarosil, aged: 5 days - 1 month in the amount of 18 ml, 1-3 months - 24 ml; 3-4 months - 30 ml; 4-5 months - 36 ml, 5-6 months 38 ml, 6-9 months 42 ml, 9-12 months 48 ml, per animal per day, (total for 12 months, 13.53 liters), compared with analogues increased live weight - by 31.6, kg - 12.3% (p &lt;0.05), gross weight gain by 31.1 kg - 13.9%, average daily gain by 85 g - 13.8% (p&lt;0.05), reduced feed consumption per 1 kg of live weight gain by 0.367 feed. units, - 4.41%, (0.441 ECU - 4.36%), cash costs per 1 kg of live weight gain by 3.49 rubles. - 3.83%, reduced the incidence by 31.8%, ensured safety up to 100%, increased this indicator by 18.2%, contributed to an increase in the economic effect due to the absence of the need to spend on medications by 9531.00 rubles (average per animal 1059.00 rubles), feed consumption for retired animals - by 11726.04 rubles. After feeding the feed additive "Yarosil", its prolonged action was observed, but gradually decreased with age. 3 months after feeding, at the age of 15 months, the difference between the groups was 25.6 kg - 8.3%, at 18 months of age 18.8 kg -5.2%, compared with 12 months of age less by 6.0 kg - 4.0% and 12.8 kg - 7.1%, respectively.

Improvement of elements of cultivation of milk heifers on farms and complexes for milk production

The article examines the problem of forming groups of heifers in the dairy period in order to obtain cows with high milk productivity, as increasing milk production is an important and complex problem of agricultural science and practice.&#x0D; The results of a study on improving the breeding of heifers of the Ukrainian black-and-white dairy breed in the conditions of the State Enterprise "Kutuzivka" of Kharkiv region are presented.Scientific and economic research was focused on substantiating the effectiveness of the influence of different numbers of heifers in the technological group on their growth and development in the milk period of ontogenesis. It was found that the actual difference in feed consumption in each series of experiments between animals in each group of 5-10-15-20 heads and a den area of 1.8 m2-2.2 m2 on deep straw litter was not. And when comparing technological groups of 5-20, 10-20, 15-20 heads, differences were revealed.&#x0D; In the production conditions of the dairy complex of SE Kutuzivka of Kharkiv region, the experiment was conducted in the spring-summer period. The experimental groups were formed as follows: for research, four technological groups of heifers with a population of 5, 10, 15 and 20 heads in each were selected, which were kept on a deep straw litter with a den area of one head 1.8–2.0 – 2.2 m2.&#x0D; It is experimentally proven that the use of growing heifers from 10 days of age to 6 months. loose on a deep straw litter in group sections of 5, 10 and 15 heads compared to the counterparts of 20 heads, contributed to an increase in live weight gain on average during the experiment by 20.5-22.5 % (P &lt;0.05) . It is established that the technology of cultivation in the spring-summer period in the premises of light type contributes to the increase of the average daily increase from 27.2% to 30.3 % (P &lt;0.05).&#x0D; Under these conditions of growing heifers in the technological groups of 5, 10 and 15 heads in comparison with the analogues of the group of 20 heads there was a reduction in feed consumption per 1 kg of live weight gain by 20.4 –26.5 %.&#x0D; Analysis of the results on the formation of technological groups of heifers in the production conditions of the dairy complex showed that the maintenance of heifers in the technological group of 15 heads and an area of 1.8 m2 per head is the best. Since the results of the comparative analysis of the complex efficiency of each of the options N(Ck)compared to the idealized, showed a significant advantage of this option, for which the target function according to the considered criteria was lower and was 0.0894. Other options were 1.0381 – 3.5839 times worse.