3rd Experimental Group Research Articles

ПРОДУКТИВНЫЙ ПОТЕНЦИАЛ ВЫРАЩИВАЕМОГО МОЛОДНЯКА СВИНЕЙ ПРИ ОБОГАЩЕНИИ РАЦИОНОВ РАЗЛИЧНЫМИ СОЕДИНЕНИЯМИ СЕЛЕНА

To carry out scientific and economic experience, three groups of piglets-analogues at the age of 28 days (20 heads in each group) were selected, depending on the origin and live weight. The duration of the experiment was (62 days). According to the experimental scheme, the growing young pigs of the 1st control group as part of the SK-4 compound feed received 0.30 mg/kg of inorganic selenium feed in the form of sodium selenite, analogues from the 2nd and 3rd experimental groups received the same compound feed with the addition of 0.15 and 0.20 mg/kg of organic selenium, respectively. Feeding young pigs of the 2nd and 3rd experimental groups as part of the SK-4 compound feed of organic selenium in the amount of 0.15 and 0.20 mg/kg contributed to an increase in live weight and average daily gains at 60 and 90 days of age, respectively, by 7.46 g, 7.24 g and 12.3%, 12.1% and 8.4 g 8.3 g and 9.5%, 9.5% compared to control animals. The inclusion of various levels of organic selenium in the composition of the SK-4 compound feed contributed to an increase in the digestibility of all nutrients compared to the control. The inclusion of organic selenium in the growing young pigs of the experimental groups of 0.15 and 0.20 mg/kg of feed had a positive effect on the dynamics of morphological, biochemical, immunological parameters that cause an increase in the protective properties of the body. The greatest economic effect was obtained in the 2nd experimental group of piglets receiving 0.15 mg of B-Traxime Selenium per 1 kg of feed and amounted to 292.5 rubles per head.

Efficiency of complex feed hydrolysate on piglets of the rearing group

The authors carried out researches to study the effect of complex feed hydrolysate on the zootechnical parameters of piglets of the rearing group. As a result of the experiment, it was found that the productivity of piglets in the experimental group was higher than in the control group by 1.07 kg (3.61%), 1.45 kg (4.90%) and 2.10 kg (7.09%). When analyzing the weight gain of piglets, an increase in this parameter was also found in the experimental groups. Thus, in the 1st experimental group, the weight gain of piglets during the study period was 4.42% higher than in the control group, 6.72% higher in the 2nd experimental group and 7.87% higher in the 3rd group. The results of calculating feed costs per 1 kg of animal weight gain showed that in the 1st, 2nd and 3rd experimental groups, the conversion of compound feed was 1.88 kg, 1.82 kg and 1.81 kg, which is respectively lower than in the control group by 4.09%, 6.65% and 7.16%. The results of the general and biochemical analysis of piglets’ blood, reflecting metabolic processes and the state of internal organs, showed the absence of a negative effect of the feed additive on the animals’ body, the studied parameters were within the limits of intraspecific norms. The results of physiological experiments showed that the use of feed additives in the diet of pigs contributed to a positive effect on the level of digestibility of individual nutrients in the diet.

Features of rumen digestion of cows when an enzyme feed additive is included in the basic ration

Under the influence of microorganisms 95 % of sugars and starch, 70 % of fiber and 40–80 % of protein are broken down in the fore stomachs. Since the microfl ora of the rumen cannot always cope with the digestion of a large amount of coarse feed, enzyme drugs designed to increase productivity and preserve animal health come to their aid. The use of enzyme additives is relevant and allows us to prevent the action of anti-nutritional factors of feed, increase the activity of endogenous enzymes, thereby contributing to the increase in metabolic processes in the body and increase milk productivity. The purpose of this work was to study the features of microbial processes in the rumen of lactating cows when the multicomponent enzyme feed additive Kormomix® Enzyme was included. The use of the enzyme additive aff ected the physics and chemical parameters of the rumen fl uid. The pH concentration in all groups was the same. The volatile fatty acids in the 2nd and 3rd experimental groups were on the same level as the control. In the 1st experimental group, there was a decrease in volatile fatty acids by 1,15 mmol/100 ml compare with control group. The assimilation of ammonia in animals of the 2nd experimental group, which received 50 g /head /day of the enzyme additive, was higher in compare with the control group. The ratio of volatile fatty acids in the rumen fluid of cows of the experimental groups has changed towards the increase in the proportion of acetic acid. The composition of the bacterial community of the rumen improved with the inclusion of 50 g/head/day of the enzyme additive Kormomix® Enzyme. The number of cellulolytic microorganisms exceeded the control level by 6,45 abs.%. Thus, the use of the enzyme additive led to the intensification of microbiological processes in the rumen of cows.

APPLICATION OF VERMIGHUMUS IN FEEDING PIGS

The article analyzes a new method of fattening young pigs by introducing a biologically active additive into the diet - vermighumus, which is a product of pig manure processing by California worms. In addition to the standard diet, the youngsters of the research groups consumed vermighumus in a dose of 130, 180, 230 g per head per day. The young of the control group consumed standard compound feed. It was established that the application of vermighumus into the diet of young pigs improved their fattening indicators. In particular, the youngsters of the second and third experimental groups exceeded the control analogues in terms of live weight at the end of fattening by 3.73 and 5.53%, respectively. Youngsters of the second and third experimental groups also had higher growth energy by 4.80 and 7.40%, respectively, and better feed payment (by 0.43 and 071 kg). In terms of half-carcass length, young animals of the experimental group 3 did not significantly exceed the counterparts of the control group. In the 2nd and 3rd experimental groups, the fat thickness at the level of the 6th-7th thoracic vertebra was smaller (by 5.85-7.50%). They prevailed over the control analogues in the area of the "muscle eye" (by 2.83-5.45%). The weight of the rear third half of the carcass and the content of meat in the carcass was the highest in young animals of the 3 experimental group (by 7.85% and 4.91%, respectively), and the fat content in it was lower than in the control group (by 14.52%). The smallest fat thickness at the level of the 6-7 thoracic vertebra, as well as the content of fat in the carcass, was in young animals of the third experimental group. Among the indicators of the physical and chemical properties of the muscle tissue of young pigs of the experimental groups, no statistically significant differences were found. However, there is a certain trend towards a decrease in such indicators as the level of acidity, tenderness and losses during cooking, and an increase in the moisture-holding capacity and intensity of coloring in the young of the control group. The tasting evaluation revealed minor differences among the experimental animals. The relative number of lymphocytes (% of the total number of leukocytes) in pigs treated with vermighumus was higher (by 4.44-6.66% Р<0.05) than in counterparts fed with conventional compound feed, which indicates an improvement in resistance animalsEnrichment of the ration of young pigs with vermihumus as a biologically active additive contributed to the improvement of fattening and meat qualities and ensures obtaining additional basic products in the amount of UAH 320.38-354.34 per head.

Metabolism, egg production and reproductive traits of the ducks cross Cherry Valley when feeding the antioxidant Bisphenol-5

The dynamic development of domestic poultry farming makes it necessary to constantly search for effective ways to increase the productivity of poultry and the quality of the products obtained. A new fat-soluble antioxidant of Russian production Bisphenol-5, previously successfully proved itself in the rearing of broiler chickens and calves in the preweaning period. It has not yet been used in feeding ducks of the parent herd. Therefore, the study of the use of this drug in feeding ducks is relevant. The purpose of the work was to study the metabolism, egg production and reproductive traits of Cherry Valley ducks cross when feeding the antioxidant Bisphenol-5. Poultry of the experimental groups were additionally added to the feed with diff erent amounts of bran enriched with the fat-soluble antioxidant Bisphenol-5 in a concentration of 0,125 %. Moreover, the ducks of the 1st experimental group were input into the compound feed with the studied premix in the amount of 12,5 g/t of feed. The poultry of the 2nd experimental group received compound feed, to which bran enriched with the antioxidant Bisphenol-5 (0,125 %) was added at the rate of 25,0 g of premix per 1 ton of feed. The poultry of the 3rd experimental group were fed compound feed containing a premix with the antioxidant Bisphenol-5 (0,125 %) at the dose of 50,0 g/t of feed. It was found as a result of research that feeding Cherry Valley ducks cross with compound feed enriched with the fat-soluble antioxidant Bisphenol-5 by introducing 12,5-50,0 g of premix per 1 ton of feed contributed to the increase in the production of hutching eggs by 5,2-11,5 %, increased feed conversion by 4,8-10,2 %, and reduced prime-cost production of 1 hatching egg by 3,8-8,1 %, reduction of the prime-cost of a daily duckling by 6,0-23,1 % and increase in profitability by 8,5-39,6 %. The addition of bran in the amount of 25,0 g/t of feed containing 0,125 % of the antioxidant Bisphenol-5 to the complete compound feed of ducks of the parent herd is the optimal dose of the drug being studied.

The ways to improve the biological and morphological parameters of young fattening pigs

Studies were carried out to find the new ways to improve the efficiency of iodine use for the young pigs. During the scientific and economic experiment it was found that bringing iodine to the physiological norm, in combination with introduction of 3% bentonite clay into the diets of young fattening pigs, provided a positive effect on the morphological composition of carcasses, slaughter parameters and meat quality of the pigs. So fattening the yelts with the diets with a physiological norm of iodine in combination with 3% bentonite clay allowed young pigs of the 3rd experimental group to reach a slaughter weight of 78.95 kg at the age of 8 months, which is 10.1% more than in the control group, and 4.2% and 2.5% more in comparison with the 1st and 2nd experimental groups. The slaughter yield in yelts of the 3rd experimental group increased by 2.43% (P<0.05) compared to the control group. The largest (30.17 cm2) area of the “rib eye” was recorded in the 3rd experimental group, which is 5.60% more than the control one, while the carcasses of pigs of the 3rd experimental group contained muscle tissue by 4.74% (P<0.05) more than the same in the control group. Analysis of the Musculus longissimus showed a significant increase in protein content in the 3rd experimental group by 1.22% compared to the control group (P<0.05). The protein-quality parameter was significantly higher in the muscle tissue of young pigs of the 3rd experimental group and amounted to 10.90 (P<0.05), which is 1.12% higher than in the muscle tissue of the control group yelts. The maximum content of oleic acid was found in the lard of animals of the 3rd experimental group — 49.59, which is 1.28% (P<0.05) higher than in the control group.

THE IMPACT OF EFFECTIVE RECESS DURATION ON ACADEMIC PERFORMANCE OF ELEMENTARY SCHOOL CHILDREN

Background: It always remained important for school administrators and policy makers to improve student’s achievement scores. Reducing recess or break time to increase instructional time, has become a common practice in many parts of the world. Breaks during continued subjective undertakings should lessen psychological obstruction and boost learning and accomplishment.
 Objective: The objective of the study was to analyze the effect of increased recess time on English reading and Recall scores of 3rd and 4th grade students.
 Methodology: The study employed an experimental research design with pre-test and post-test scheme, experimental and control group, having 30 students each group from two elementary schools of District Okara, Pakistan. 3rd and 4th grade experimental group was assigned with an increased recess time of 60 minutes and the control group with 30 minutes a day. Sample was taken from these schools by stratified sampling using equal allocation, providing same difficulty environment. A scoring system was developed based on standardized tests. Statistical analysis was done by using t- test.
 Results: Results indicate a significant difference between Reading and Recall scores, in both groups.
 Conclusion: Policy makers and educationists must review policies and procedures regarding recess, and must note its role in the academic performance.

Improving the productive traits of steers when using selenium-containing feed additives in their rations

Currently, there is great interest in the use of selenium preparations in animal husbandry. Chickpeas are high in selenium and protein. The feed additive benut made on the basis of chickpeas has a high content of selenium. At the same time, an active interaction of selenium with proteins was revealed. In this regard, the study of the beef productivity of steers when using the drug DAFS-25 in the ration separately and together with the feed additive benut is important and relevant. The purpose of the work was to increase the meat productivity and quality of beef of steers when using the selenium-containing drug DAFS-25 in rations separately and in combination with the high-protein feed additive benut. In the experiment, the steers of the 1st control group received the main ration (MR); the 2nd experimental – MR + DAFS-25 (1,6 mg/kg of concentrates); the 3rd experimental – MR + 0,5 kg of benut feed additive (0,5 kg/head/day) instead of an equivalent amount of concentrates + DAFS-25 to ensure the content of selenium, as in the ration of animals of the 2nd experimental group. The beef productivity of fattened steers of Aberdeen Angus breed, indicators of blood composition, digestibility and assimilation of feed nutrients, beef quality and effi ciency of its production were studied. The economic evaluation of the research results showed that on average 1 head additional costs from the use of selenium-containing additives amounted to 140,6 rubles in the 2nd experimental group and 138,7 rubles in the 3rd experimental group. The use of these additives made it possible to reduce the prime-cost of 1 c of growth in the 2nd experimental group by 24,9 and the 3rd group by 265,8 rubles. Profi ts from the sale of beef in the 2nd experimental group were received by 84,4 rubles more and in the 3rd group by 574,8 rubles more than in the 1st control group. In the 2nd and 3rd experimental groups the level of profitability increased by 1,2 and 13,2 abs.% compared with the 1st experimental group, where it amounted to 27,3 %.

The effect of gamma-octalactone supplementation on the content of chemical elements in the muscles and liver of broiler chickens

Relevance. In recent years, a large number of new herbal preparations have appeared on the market, including gamma-octalactone. It is a naturally occurring compound isolated from Eucalyptus viminalis leaf extract. This compound has a wide range of therapeutic properties, which is associated with its antiinflammatory, antiseptic effect, stimulates appetite, increases the secretion of digestive enzymes and increases performance in animals.Materials and methods. The paper studied the features of the accumulation of chemical elements in the body tissues of broiler chickens when the compound gamma-octalactone was included in the diet. The studies were carried out on broiler chickens of the Arbor Acres cross at the age of 7–42 days. According to the scheme of the experiment, inthe diet of chickens of the 1st, 2nd and 3rd experimental groups was added gamma-octalactone at a dosages of 0.05, 0.1 and 0.2 ml/kg of b.w./day. The elemental composition of biosubstrates was studied using atomic emission and mass spectrometry.Results. It was found that the addition of gamma-octalactone contributed to the redistribution of chemical elements in the body tissues of the experimental poultry. In particular, the broilers of the experimental group that received gamma-octalactone at a dosage of 0.05 ml/kg of b.w./day had higher concentrations of B, Co, Ni, Se, V, Zn in the pectoral muscles. An analysis of the concentrations of the main essential elements in the thigh muscles of broiler chickens showed that feeding gamma-octalactone at a dosage of 0.05 ml/kg of b.w./day was accompanied by a significant increase in the content of Ca, Na, Fe, Si and Zn and a decrease in the levels of Cr, Cu and Ni relative to poultry of the control group. There was also a significant increase in the concentrations of Cu, Fe, Se, Zn, Mg, P in the liver of chickens of the experimental group, who received gamma-octalactone in the diet at a dosage of 0.1 ml/kg of l.w./day, against the background of a decrease in the concentrations of Si and Na.

The use of a polyphenol-carbon complex from the Antarctic black yeast Nadsoniella nigra in the diet of poultry and their effect on the hatching quality of quail eggs of laying hens

The results of research on the influence of the polyphenol carbon complex from the Antarctic black yeast Nadsoniella nigra, which is additionally introduced into compound feed, are presented on the hatching qualities of quail eggs. Experimental studies were conducted in the conditions of the problematic research laboratory of feed additives of the National University of Bioresources and Nature Management of Ukraine. The material for the scientific and economic experiment was adult quail of the Pharaoh breed. Experiments were conducted using the group method. Accordingly, 192 heads of quails were selected for the experiment at 42 days, from which four groups were formed according to the principle of analogs - a control group and three experimental ones, 48 heads in each with four replications). When selecting analogs, the sex, age, and body weight of the bird were taken into account. The main period lasting 210 days, was divided into seven sub-periods, each of which lasted 30 days. The composition of the compound feed for the quails of the control and experimental groups and the set and number of ingredients in it were identical. The chemical composition of the combined feed used for feeding quails was the same and differed only in the content of PFC. During the experiment, the preservation of livestock and productivity were recorded, and feed conversion was also calculated. It was experimentally established that adding 0.1, 0.5, and 1.0 mg/kg polyphenol-carbon complex from the Antarctic black yeast Nadsoniella nigra to compound feed positively affects the hatching properties of eggs and, at the same time, reduces the percentage of hatching waste. At the same time, in the birds of the 3rd experimental group, which were fed 0.5 mg/kg of PFC as part of the compound feed, respectively, the percentage of fertilization was 2.2%; hatchability of eggs by 3.8%; and the yield of young by 5%, compared to birds that were not given PFC compound feed.

Influence of Feeding Wormwood (Artemisia Capillaris) on Quail Meat Productivity

Recently, the requirements for the quality and safety of poultry products have significantly increased, what has notably limited the use of antibiotics in feeding poultry. This is one of the reasons for the growing interest in the use of phytogenic feed additives. We have conducted an experiment to determine the influence of Artemisia capillaris on young quail meat productivity. To carry out the experiment, we have formed five groups, each counting 100 quail heads. During the experiment, which lasted for 35 days, dried powdered wormwood (Artemisia capillaris) in the amount of 0.5%, 1.0 and 1.5% by weight of compound feed was introduced into the feed of birds of the 2nd, 3rd and 4th experimental groups. The experiment showed a positive effect of the studied factor on the body weight of quail; the highest body weight was in quail of the 3rd group - 251.03 g, and the lowest it was in the control group - 238.24 g. Also during the experiment, the lowest feed costs per 1 kg of body weight gain were in quail of the 3rd experimental group, which by this indicator exceeded the control group by 4.91%. Feeding wormwood as a part of the compound feed in the amount of 0.5 and 1.0% of the 2nd and 3rd experimental groups increased the weight of gutted carcass by 0.41-1.67%, while further increase of wormwood content to 1.5% in the feed of the 4th experimental group led to a decrease in the weight of gutted carcass by 0.26% compared to the control group.

Study of the leukocyte profile in the mammary gland of lactating rats under the influence of oxytocin

During lactation, the structure of the organ and the composition of lymphoid cells change in the mammary gland. The change in the cells of the leukocyte series indicates a deep relationship between the immune system and the lactation process. The functioning of the mammary gland is under the influence of pituitary hormones and sex hormones, which change the cytological structure of the organ and the content of leukocytes in it. The studies were carried out on lactating rats. Were formed, one control group and two experimental groups of animals, 5 in each. Oxytocin was injected intraperitoneally at a dose of 0.1 ml to rats of the 2nd and 3rd experimental groups. The structure of the mammary gland and the composition of leukocyte cells were studied before the influence of oxytocin, 5 and 10 minutes after the administration of the hormone. The mammary glands were dissected and impression smears were prepared. The smears were stained and lymphoid cells were counted using optics. Under the influence of the hormones of the adenohypophysis, during the lactation period, the glandular tissue in the mammary gland replaces the adipose tissue. Insulin, growth hormone are able to increase the rate of DNA synthesis, stimulate mitotic activity, due to which the cell mass of the developing organ increases. With the development of structural components characteristic of a differentiated secretory cell, the structure of the alveolus is formed. Along with the differentiation of secretory cells in the alveolus, the formation of the functional activity of the myoepithelium occurs. A slight increase in the number of lymphocytes in the preparations of the control group of rats was revealed. Under the influence of the neurohypophysis hormone, the composition of immunocompetent blood cells changed. The introduction of intraperitoneal oxytocin, after 5 minutes, stimulated a significant increase in the number of lymphocytes, compared with the control group, from 16,20±3.42 to 37,80±2.63 (p<0.001). By the 10th minute, on the contrary, there was a significant decrease to 5,40±1.48 cells (p<0.001). Monocytes and a small number of neutrophils were also established. The lactation and pre-lactation periods directly affect the functioning of the immune system, changes in the composition of its cells in the mammary gland and their migration through the hemato-milk barrier into colostrum.

The intensity of fat accumulation and its distribution in the body of young cattle

The intensity of fat accumulation and its distribution by fat depots in the body of animals is signifi cantly infl uenced in cattle breeding by the breed factor. The use of commercial crossbreeding of dairy and dual-purpose productivity cows with sires of beef breeds allows us to get crossbred young cattle with better indicators of beef productivity than that of the parent breed. The purpose of the research was to study the effect of crossbreeding cows of Black–and-White with sires of Aberdeen-Angus and Charolais breed on the intensity of fat accumulation and its distribution in fat depots in purebred and crossbred steers. In order to conduct the experiment, 3 groups of steers were formed with 15 heads in each. Purebred steers of Black-and-White breed were included in the 1st control group, in the 2nd and 3rd experimental groups, respectively, half-blooded steers from crossbreeding cows of Black-and–White breed with sires of Aberdeen Angus and Charolais breeds. Animals were slaughtered at birth, at the age of 6, 12, 15 and 18 months determining the amount of adipose tissue of various localization (visceral, subcutaneous, intermuscular). Signifi cant age and breed features have been established in the order of deposition of adipose tissue and the correlation of its accumulation in fat depots. The biggest contribution to the increase in the total body fat mass of 18-month-old steers regardless of their breed was made by intermuscular (29,8–35,2 %) and subcutaneous (24,5–27,0 %) fat depots. Other fat depots according to the relative mass of lipids and their value in increasing the total body fat mass are arranged in the following decreasing order such as renal (13,8–15,4 %), omentum (9,3–14,1 %), intramuscular (9,3–14,7 %), mesenteric (2,5–4,4 %). Steers of Black-and-White dairy breed tended to deposit internal fat, while crossbreds with Aberdeen Angus and Charolais breeds tended to accumulate intermuscular and intramuscular fat with almost the same subcutaneous fat deposition.

Infl uence of feeding Chrombelmin before and after calving on the body condition score and productivity of cows

Chrombelmin is a gel-like mixture of chelated compounds of essential trace elements such as zinc, manganese, copper, cobalt, iodine, selenium and chromium. The purpose of the research was to study the enfl uence of the Chrombelmin metalloprotein complex on the body condition score and productivity of cows before and after calving. Feeding an unconventional feed additive in the rations of cows at the rate of 15 and 20 ml per 1 head/day for 20 days before calving and 30 days after calving caused optimal body condition score of cows due to optimization of energy metabolism in the body and an increase in productive traits. At the beginning of the experiment the body condition score of cows (estimated 7 days before calving) was close in all groups and amounted to 3,25 points in the 1st control group, 3,31 and 3,19 points in the 2nd and 3rd experimental groups, respectively, which was 1,8 % higher in the 2nd group and 1,8 % lower in the 3rd group then the 1st control group. During the period of the experiment this indicator in animals of the 1st control group decreased to 2,82 points. In the cows of the experimental groups body condition score was 7,1 and 3,2 % higher in the groups, respectively. Cows received Chrombelmin in the ration showed the increase in the average daily milk yield of natural fat content by 3,5–5,8 kg, and in terms of 4 % milk by 5,1 kg per day. In the milk of cows of the 1st control group the fat content was 3,72 %, in animals of the experimental groups this indicator increased by 0,43 and 0,31 abs.% when feeding 15 and 20 ml of Chrombelmin per head/day. The mass fraction of protein in milk in cows of the experimental groups was higher than the control group and amounted to 3,41 and 3,58 %, respectively, against 3,27 % in the 1st control group (p < 0,01).

Productivity of laying hens of the cross Czech Dominant when using the biologically active additive Api-Spira

Currently, one of the factors of increasing the productivity of poultry is the introduction of biologically active additives into the feeding diet, which in turn have a diverse composition and their main role is not only to increase production, but also to improve the quality of producing products at low production costs. One of the well-proven is the biologically active additive Api-Spira. It has been studied with a positive effect on broilers, as well as on some farm animals. It contains only natural substances. The purpose of the research was to study the productivity of laying hens of the cross Czech Dominant when using the biologically active additive Api-Spira. The economic effi ciency of using the biologically active additive Api-Spira at a dose of 1,28 g per laying hen (the 2nd experimental group) was higher than in the 1st control group, where the additive was not used. Thus, the level of profi tability of egg production in the 2nd experimental group was 21,5 %, and in the 3rd and 4th experimental groups it was 16,8 %, which exceeded the indicator of the 1st control group by 5,7 and 1,0 abs.%, respectively. Thus, the study of the productivity of laying hens of the cross Czech Dominant when drinking the biologically active additive Api-Spira showed the eff ectiveness of its use. In order to improve the productivity of laying hens of egg crosses, we recommend the use of the biologically active additive Api-Spira with the main diet of 1,28 g per laying hen for 180 days according to the scheme: a month of drinking, a month break.

Productive traits of chickens of the parent herd of broilers of the cross Ross 308 when using the drugs Emicidin and Apex

Drugs with a wide spectrum of action, including natural growth stimulants and antioxidants, which could provide an increase in the natural resistance, livability and productivity of poultry of the parental herd and broiler chickens and did not adversely aff ect the quality of hatching eggs and poultry meat, are of considerable interest for industrial poultry farming. Such drugs include the antioxidant Emicidin and the natural growth stimulator of plant origin Apex. The drug Apex 3010 is used for poultry. The purpose of the work was to study the eff ect of the antioxidant Emicidin and the natural feed additive Apex 3010 on the productive traits of chickens of the parental herd under the conditions of industrial poultry housing technology. Comparative comprehensive studies of productivity, reproductive traits, morphological indicators of the quality of hatching eggs, the microstructure of the shell was carried out, the results of brooding of eggs of chickens of the parental broiler herd using the drugs Emicidin and Apex 3010 separately and in combination with each other were analyzed. It was found as a result of the conducted studies that the egg production of chickens for the initial laying hen in the 1st (Emicidin), 2nd (Apex 3010) and 3rd (Emicidin+Apex 3010) experimental groups was 2,6 % (p ≤ 0,05), 3,2 % (p ≤ 0,01) and 5,8 % (p ≤ 0,001), respectively, are higher than in the control group. The use of the drugs Emicidin and Apex 3010 both separately and in combination with each other had a positive infl uence on the quality of brooding eggs obtained from chickens of experimental groups at the end of the productive period at the age of 52 weeks. The highest production and economic indicators for the housing of chickens of the parental broiler herd were achieved in the 3rd experimental group with the complex use of the drugs Emicidin and Apex 3010. The diff erence in the prime-cost of 1 head the daily chicken in the 3rd experimental group and the control group was 1,52 rubles or 8,32 %.

The application of a biotechnological drug when the rearing of broiler chickens

Poultry farming is the most dynamically developing branch of animal husbandry, from which we receive such valuable products as eggs and meat. The main costs in the production of livestock products, including poultry, fall on feed, therefore increasing their digestibility, the use of compound feed from cheap domestic raw materials without reducing the nutritional value while fully providing poultry with the substances necessary for normal functioning is one of the ways to reduce the primecost. This is possible due to the use of new feed additives including biologically active substances, including enzymes that increase the digestibility of nutrients. The purpose of the work was to study the possibility of using the biologically active additive Ares in the production of broiler meat, including as a substitute for antibiotics. It was found as a result of the conducted studies, that the chicks from the 2nd experimental group received the drug Ares in the amount of 0,6 g/kg of compound feed had the greatest live weight. Lower indicators occurred in broiler chickens of the 1st and 2nd experimental groups. However, they exceeded the normative indicators of the cross Coob 500 and the results of the control group by live weight at the age of 36 days. According to the growth periods, broiler chickens grew unevenly and diff ered signifi cantly among themselves by groups. So, in the fi rst 7 days of the rearing of the group, there was almost no diff erence in the growth rate. Only broiler chickens of the 1st experimental group achieved the standard growth indicators, the diff erence in other groups compared with the standard was 7,6 and 33,1 g or 3,5-15,3 %. The superiority of broiler chickens of the 1st experimental group over the other groups was 23,5; 33,1 and 8,6 g or 11,0; 16,0 and 4,0 %. At the age of 17 days broiler chickens of the 2nd experimental and control groups had a large live weight, with some lag of the 1st and 3rd experimental groups. At the end of rearing all experimental groups outperformed broiler chickens of the control group by 39,4–294,9 g or 2,0–14,0 %. Thus, the use of biologically active feed additive Ares allows us to get high results in the rearing of broiler chickens.

Antioxidant Bisphenol-5 in the feeding of broiler chickens

The further development of meat poultry farming is due not so much to the availability of resource-aving technologies and knowledge-intensive industries, as to the optimization of the base of feed. Sources of high-quality protein as well as enzyme complexes, specialized energy additives, feed stimulants of growth rate, as well as vitamin and mineral premixes come to the fore. The purpose of the research was to study the use of the antioxidant Bisphenol-5 in the feeding of broiler chickens. The control was the broilers that were given a complete compound feed according to the age and feeding standards of broiler chickens on the farm. Poultry of the 1st experimental group in addition to the main diet received the additive Bisphenol-5 at a dosage of 0,5 μmol per 1 kg of live weight or 0,0002 % of weight of compound feed; broiler chickens of the 2nd experimental group were additionally input with Bisphenol-5 at the dosage of 1,0 μmol per 1 kg of weight or 0,0004 % of weight of compound feed; broilers the 3rd experimental group was input 2,0 μmol/kg of live weight or 0,0008 % of weight of compound feed; the 4th group received 4,0 μmol/kg of live weight or 0,0015 % of weight of compound feed of the studied antioxidant Bisphenol-5. The optimal dose of feeding the new fat-soluble antioxidant Bisphenol-5 to broiler chickens was 2,0 μmol/kg of live weight or 0,0008 % of weight of compound feed has been proved and justifi ed. The conducted studies have convincingly proved that in order to improve the assimilation of nitrogen in the diet, increase its deposition, and, consequently, increase the growth rate of broilers it is necessary to add the antioxidant Bisphenol-5 in the dose of 2,0 μmol/kg of live weight or 0,0008 % to the weight of compound feed.

The influence of a complex energy and mineral additive on the productivity and morphological and biochemical status of blood in cows

The results of research on the study of morphological and biochemical parameters of blood and milk productivity of lactating cows as a result of feeding a complex energy and mineral additive have been presented in the article. In addition to the main ration, animals of the 2nd and 3rd experimental groups received an energy additive in the amount of 210 and 220 g, as well as a mineral additive of 40 and 30 g per head/day. The results of the studies showed that the animals of the experimental groups that consumed the energy and mineral complex had normalization of mineral and carbohydrate metabolism. It was noted that the inclusion of a complex energy and mineral additive in the ration of animals of the 2nd and 3rd experimental groups contributed to an increase in the number of erythrocytes by 1,9 and 2,6 %, leukocytes by 12,2 and 13,9 %, hemoglobin by 2,0 and 2,5 %, total protein by 2,3 and 2,7 %, calcium by 6,2 and 12,1 %, phosphorus by 12,3 and 13,6 %, magnesium by 8,2 and 13,4 %, glucose by 2,9 and 5,6 %. Milk yield in the group of cows for 100 days of lactation in the 1st control group was 19700 kg of milk, in the 2nd experimental group it was by 7,9 % more, and in the 3rd experimental group by 10,4 % more. The fat content in the milk of cows of the experimental groups was higher by 0,1 3 and 0,15 abs.%, and protein by 0,07 and 0,09 abs.%. Revenue from the sale of milk in the 2nd and 3rd experimental groups increased by 7,9 and 10,4 %, the level of profi tability of milk production by 6,70 and 8,02 abs.% compared to the 1st control group. Consequently, the feeding of the new energy and mineral additive had a positive effect on the physiological state of the animals, allowed to increase the dairy productivity of cows and the profi tability of milk production.

Comparative evaluation of the impact of feeding live yeast and sodium bicarbonate to high-yielding cows on their productivity and milk quality

High productivity of dairy cows is due to genetics, especially during the first phase of lactation and is manifested by appropriate feeding, namely a significant amount of concentrates in their diet. However, such feeding has a significant disadvantage – lowering the pH in the rumen and the development of acidosis. In order to prevent the development of this pathological process, various buffer supplements are introduced into the diet of cows, including live yeast and baking soda. Therefore, the aim of the study was to experimentally evaluate the effect of sodium bicarbonate and live yeast Levucell SC on the productivity and milk quality of dairy cows during the first phase of lactation. During the scientific and economic experiment, the main period of which lasted 76 days, the animals of the control group received a basic diet without feed additives. Cows of the 2nd experimental group to the basic diet were added live yeast Levucell SC in the amount of 1 g/head/day, and the 3rd experimental group – sodium bicarbonate at a dose of 150 g/head/day. According to the results of the experiment, it was noted that the highest milk productivity was recorded in animals of the 2nd experimental group (41.9 kg/day), while in the control this figure was 37.3 kg/day. Changes in productivity and cows of the 3rd experimental group of 39.8 kg / day were positive. A similar trend occurred in the fat content of milk, somatic cell content and bacterial contamination. According to all these indicators, the best results were recorded in cows of the 2nd experimental group, which consumed live yeast. Economic analysis of the results of the experiment showed that despite the very high cost of feed additive Levucell SC, a small dose of its introduction is more profitable than the use of sodium bicarbonate. The additional income from the introduction of Levucell SC in the diet of live yeast at 2022 prices is 95 kopecks, while in the group of cows that consumed sodium bicarbonate, this figure is only 41 kopecks. Key words: live yeast, Levucell SC, sodium bicarbonate, baking soda, milk yield, acidosis.