scholarly journals Increase of the growth rate in young pigs while using the feed additive «Natufactant»

2021 ◽  
Vol 9 (1) ◽  
pp. 35-39
Author(s):  
N. A. Begma ◽  
O. I. Musich
Keyword(s):  
Growth Rate ◽  
Weight Gain ◽  
Physiological State ◽  
Live Weight ◽  
Active Surface ◽  
High Energy ◽  
Feed Additives ◽  
Daily Weight Gain ◽  
Feed Additive ◽  
Young Pigs

The improvement of production indicators (feed conversion ratio, average daily body weight gain, growth rate, etc.) in animal husbandry implies a high energy requirement. Such a need can only be met by including fats in the diet. Fat is the main and most efficient source of feed energy, but at the same time, one of the most expensive feed component. Using a fat emulsifier is an increase in the quality of the obtained product and a decrease in its cost. The addition of synthetic emulsifiers is a relatively new opportunity to increase fats’ active surface compared to other widely used feed additives. This reduces the cost for oil in the feed and also a chance to reduce feed total cost. By increasing fats’ active surface, emulsifiers expand the action of lipases and promote micelles formation. Higher the fat percentage in the diet, lower the percentage of its absorption. In high-energy diets without the use of complex emulsifiers, from 36% to 70% of the fat introduced into the feed is not absorbed and is excreted from the body. The beneficial effect of emulsifiers is that the digestibility of fat decreases, and it grows with an increase in the fat level in the diet. An assessment of the effect of the «Natufactant» feed additive on the growth rates of young pigs has been carried out. The maintenance and feeding of pigs were carried out in accordance with the technology adopted on the farm. The nutritional value of the main diet that is used on the farm, as well as after the inclusion of the feed additive «Natufactant», were determined. To conduct research according to the principle of analogs were taking into account the breed, live weight, and general physiological state, two groups of animals of a large white pig breed were created, 25 animals in each, with a live weight of 28 kg. The first group served as a control, and in addition to the main diet, the multicomponent emulsifier «Natufactant» was administered to the piglets of the research group at a dose of 250 g/t of feed, which was given together with the feed once per day. It was found that high average daily gains were obtained from animals to which «Natufactant» was added at the rate of 250 g per 1 ton of compound feed from the first day of the experiment and for 60 days in a row. As a result of the production check, it was found that the introduction of a feed additive into the diet of young pigs made it possible to increase the gross increase in animals’ live weight in comparison with the control, by 10.7 centners with the same level of feeding. New influence aspects of the fat emulsifier usage on the pigs’ physiological state and productivity were disclosed. It has been proven that the inclusion of the «Natufactant» feed additive into the animals’ diet stimulates the digestion processes and assimilation of basic nutrients, improves their physiological state, and increases the average daily weight gain of pigs by 15.3%. The solution to the problem of fats’ digestibility is the creation of new emulsifiers by searching for new molecules and developing effective complexes that have a synergistic effect when one component enhances the work of another. In order to significantly increase the pigs’ productivity and thereby increase the production of pork, it is necessary to ensure sufficient and adequate feeding of animals, taking into account the standards of lipid nutrition. It will also help to improve product quality and reduce production costs.

Influence of feed additives «Tetra+» and «Glimalask» on the meat productivity of pigs and consumer properties of pork

2021 ◽  
pp. 12-21
Author(s):  
V. V. Salomatin ◽  
Yu. A. Nebykova
Keyword(s):  
Physiological State ◽  
Live Weight ◽  
Feed Additives ◽  
Feed Additive ◽  
Control Group ◽  
Pork Quality ◽  
Pork Production ◽  
Young Pigs ◽  
Meat Productivity

Currently, the existing literature sources on the use of feed additives “Tetra+” and “Glimalask” do not fully reflect the data on the comparative study of their infl uence on the physiological state, meat productivity and pork quality of fattened young pigs. Under the conditions of the Lower Volga region comprehensive researches were carried out in a comparative aspect to improve meat productivity and pork quality through the use of feed additives “Tetra+” and “Glimalask” in the diets of young pigs on fattening. The purpose of the work was to increase the productive and pork quality of young pigs on fattening due to the use of feed additives “Tetra+” and “Glimalask” in their diets. The research was carried out in the period from 2012 to 2019. The experimental part of the work took place under the conditions of the stud farm named after Lenin in the Surovikinsky district in the Volgograd region. The object of research was young pigs of Large White breed. The positive influence of feed additives on the digestibility and use of nutrients in diets, meat productivity and pork quality, physiological indicators and economic effectiveness of pork production has been proven. It has been found that the level of profi tability of pork production was higher in the experimental groups in comparison with the control group by 5,03 and 4,48 %, respectively. At the same time the highest effectiveness has been obtained from the animals of the 1st experimental group, which received the feed additive “Tetra+” in the diet, which allowed to increase the live weight gain by 6,74 %, the level of profitability by 5,03 %. Thus, the feed additive “Tetra+” was the most effective.

scholarly journals PVMS based on the lupine grain and amido-concentrative additives for young cattle feeding

2019 ◽  
pp. 74-83
Author(s):  
V. Radchikov ◽  
V. Tzai ◽  
G. Besarab ◽  
S. Piluk ◽  
S. Serguchev ◽  
...  
Keyword(s):  
Weight Gain ◽  
Total Nitrogen ◽  
Hematological Parameters ◽  
Live Weight ◽  
Daily Weight Gain ◽  
Feed Additive ◽  
Productivity Cost ◽  
Fourth Group ◽  
Group I ◽  
Young Cattle

The protein, vitamin and mineral supplements have been developed and it was studied the efficiency of feeding with them the young cattle in the composition of the grain production. The scientific and farm experiment has been carried out during 62 days. The study was conducted in four groups of bulls with 12 heads in each. The initial live weight at the beginning of the study was about 300–310 kg. Differences in feeding were in the fact that the grain forage for young animals of group I included PVMS No. 1, II – PVMS No. 2, III –PVMS No.3, IV – PVMS No 4. The grain feed is represented mainly by barley. The protein, vitamin and mineral supplement replenished 20 % of the deficient protein. It was discovered that concentration of hydrogen ions was practically at the same level in the rumen contents of steers of different groups. As for level of ammonia, VFA, total nitrogen, ciliates in the young cattle of I, II and III groups, the differences were insignificant. The concentration of ammonia of group IVcompared to I, II and III group was higher by 15.58, 23.61 and 21.9 %, VFA – by 6.7, 19.4 and 11.1 %, total nitrogen – by 3.32, 31.44 and 24.03 %, ciliates – by 4.35, 14.29 and 9.09 %, respectively. The research results showed that digestibility of protein, fiber and BEV was higher in the fourth group by 1–7 % compared with the rest groups (P>0.05). A slight increase in nitrogen deposition was found in IV group of young animals (by 4.7–11.9 %) receiving PVMS with AFA as a source of protein. The use of calcium and phosphorus by animals was almost at the same level. The research helped to determine that the average daily weight gain of animals of all the groups was within the range 629–710 g. The highest was in the fourth group consuming PVMS No. 4 with AFA as a protein component; the second place in terms is occupied by group I – 660 g, consuming PVMS No. 2, which included lupine, AFA and standard DKMK No. 1; PVMS No. 3 with depleted phosphate used as a source of phosphorus, took the last place in terms of this indicator – 629 g. Feed cost per 1 kg of weight gain was the lowest in IV group – 8.77 feed units, in I, II and III groups, it was higher by 8.32 %; 13.68 and 10.83 %, respectively. The cost of sold products from one animal during experiment turned out to be higher for steers that received PVMS No. 4 as compared to I, II and III groups by 6.82, 11.36 and 9.1 %, respectively. Keywords: feed additive, additives, steers, growth energy, digestibility, hematological parameters, live weight, productivity, cost price.

scholarly journals DYNAMICS OF GROWTH IN THE GOUSES UNDER CONDITIONS OF THE COMBINED PHARMACOPROPHYLACTIC HOMOBIOTICS, PROBIOTICS BASED ON THE RECOMBINANT BASILL AND ENROFLOXACIN STRAIN

2019 ◽  
pp. 104-110
Author(s):  
G. A. Nozdrin ◽  
N. A. Gotovchikov ◽  
M. S. Yakovleva ◽  
N. S. Yakovleva ◽  
M. B. Lazareva
Keyword(s):  
Growth Rate ◽  
Body Weight ◽  
Weight Gain ◽  
Body Weight Gain ◽  
Physiological State ◽  
Average Daily Gain ◽  
Live Weight ◽  
Absolute Weight ◽  
Probiotic Preparation ◽  
Daily Gain

The combined effect of homobiotics, probiotics based on recombinant strains of g. Bacillus, & enrofloxacin on the dynamics of body weight gain in geese was studied. According to the principle of steam-analogs, one control and five experimental groups of 10 goslings in each group were formed. Gosyatam experimental groups used homobiotics vetom 15.1; vetom 13.1 incombination with enrofloxacin followed by replacement with a probiotic preparation Vetom 1.2. The absolute body weight and average daily gain in geese under the influence of the studied drugs increases. The severity of the effect depended on the pharmacological composition of the drugs used. The maximum absolute weight gain was observed when using the drugs according to the scheme: vetom 13.1 at doses of 25–50 mg/kg for 16 days, with further use of a 10% enrofloxacin solution at a dose of 0.5 ml/kg for 5 days and in The experiment period was 1.2 at a dose of 50 mg/kg for 16 days. After the cessation of the use of drugs, the growth rate increased for 30 days when prescribing the drugs according to the scheme: veto 13.1 at a dose of 50 mg/kg for 16 days and with further introduction of homobiotic veto 1.2 into the bird in a dose of 50 mg/kg for 16 days. The maximum average daily gain in live weight of geese was observed in the period from the 16th to the 32nd day with the administration scheme: homobiotic vetom 13.1 at a dose of 25 mg/kg of body weight 1 time per day for 5 consecutive days, then every other day for 16 days, then daily 10 % solution of enrofloxacin at a dose of 0.5 ml/kg of body weight for 5 days, then vetom 1.2 at a dose of 25 mg/kg once a day for 16 days in a row. And the maximum average daily gain in the post using period of the drug was observed on the 32nd day of the study according to the scheme: homobiotic veto 15.1 at a dose of 50 mg/kg of body weight 1 time per day for 16 days, then daily with vetom 1.2 at the same dose 1 once a day for 16 days. The studied drugs in the applied doses did not have a toxic effect on the physiological state of geese.

scholarly journals Effects of age on intake, growth, nutrient utilization and carcass characteristics of castrated native sheep

1970 ◽  
Vol 27 (2) ◽  
pp. 62-73 ◽  
Author(s):  
N Sultana ◽  
SMJ Hossain ◽  
SA Chowdhury ◽  
MR Hassan ◽  
M Ershaduzzaman
Keyword(s):  
Growth Rate ◽  
Weight Gain ◽  
Early Stage ◽  
Body Weight Gain ◽  
Carcass Characteristics ◽  
Live Weight ◽  
Nutrient Utilization ◽  
Daily Weight Gain ◽  
Live Weight Gain ◽  
Native Sheep

Twenty four castrated native sheep were grouped (six/group) into four: T1 >3 to ≤ 6; T2 > 6 to ≤ 9; T3 >9 to ≤12 and T4 >12 to ≤ 15 months. Through out the 63 days of experimental period, animals were offered ad libitum urea (3%), molasses (15%) and straw (82%) as a basal diet with concentrate mixture [14% crude protein (CP) & 11.5 MJ metabolizing energy (ME) per kg Dry Matter (DM)] @ 1% of live weight. Five days metabolic trial was conducted towards the end of the feeding trial. Besides, fortnightly live weight change, daily nutrient intake, carcass yield and carcass characteristics were studied. Daily weight gain decreased (P<0.05) with the increasing in age and the growth rate were 79, 63, 55 and 44g/day for T1, T2, T3 and T4, respectively. Higher growth rate in T1 was due to animal's inherent self-accelerated phase of growth. Feed conversion ratio (FCR; kg feed/kg live weight gain) was significantly (P<0.001) better in T1 (9.2) followed by T2 (13.8), T3 (17.7) and T4 (21.7). Cost per kg of carcass production was lower in T1 (Taka: 239), but the production cost increased in T2 (Taka: 357), T3 (Taka: 440) and T4 (Taka: 515). DM intake (g/kg W0.75) decreased with the increase in age and weight. For each gram increased in live weight gain, it required 7.7 kJ ME and animals achieved zero live weight gain (maintenance energy level) at 377 kJ/kg W0.75/d ME intake. Slaughtered weight, warmed carcass weight and dressing yield (%) of native sheep increased with advancement of age. Dressing yields were 48.5, 49, 51.4 and 55.5% for T1, T2, T3 and T4, respectively. Fat percent increased with increasing age and body fat as percent of live weight were 5.6, 7.7 15.5 and 20.6, respectively for the T1, T2, T3 and T4. As a part of total carcass, the proportional yield of tender loin and hind leg chump, most valued retail cut, decreased with the increased animal age. In the present trial, body weight gain at early stage (6-8 months of age) of life was more economical than at the later stage of life. It is suggests that the optimum market/slaughter age for native sheep maintained under these feeding and management would be at around eight months of age. DOI: 10.3329/bvet.v27i2.7556 Bangl. vet. 2010. Vol. 27, No. 2, 62-73

Feed additive based on biologically active substances for fattening steers

2021 ◽  
pp. 58-65
Author(s):  
A. R. Farkhutdinova ◽  
M. T. Sabitov
Keyword(s):  
Amino Acids ◽  
Weight Gain ◽  
Trace Element ◽  
Feed Additives ◽  
Biologically Active Substances ◽  
Biologically Active ◽  
Daily Weight Gain ◽  
Feed Additive ◽  
Experimental Group ◽  
Active Substances

The modern agricultural market offers a wide range of products designed for a highly effective and most importantly safe increase in growth indicators, the level of development and the degree of productivity of domestic animals. The leading role in achieving the highest quality result is played by a competent choice of feed additives. The purpose of the research was to study the use of a feed additive based on biologically active substances (BAS) in the fattening of steers. The effect of the feed additive based on a natural, balanced, natural complex of biologically active substances such as vitamins B, C, PP, tryptophan (with oral administration bioavailability reaches 90 %), antioxidants, essential and free amino acids, enzymes and trace element salts on the growth and development of young cattle of Black-and-White breed has been studied. The steers of the control group received the main diet, and the animals of the experimental group in addition to the main diet received the feed additive consisting of vitamins, amino acids, antioxidants, enzymes and trace element salts. It has been found by the studies that the use of the test feed additive based on BAS provides an improvement in the digestibility and assimilation of nutrients in the diet, which contributed to the increase in the average daily live weight gain in the experimental group by 263 g or 25 %, the decrease in feed consumption for 1 kg of gain and the improvement in blood biochemical parameters, such as inorganic phosphorus, AST, ALT, alkaline phosphatase within physiological norms. In order to balance the diets of 9-monthold steers by biologically active substances and improve the physiological and biochemical status, the digestibility of nutrients that contribute to the increase in the average daily weight gain, it is recommended to use the feed additive based on BAS with drinking water.

Biological and productive parameters of ruminants fed by the complex of feed additive

2018 ◽  
Author(s):  
Н. Боголюбова ◽  
В. Романов ◽  
В. Короткий
Keyword(s):  
Fatty Acids ◽  
Weight Gain ◽  
Volatile Fatty Acids ◽  
Control Period ◽  
High Energy ◽  
Amylolytic Activity ◽  
Daily Weight Gain ◽  
Feed Additive ◽  
Blood Protein ◽  
Control Group

Проведены физиологический и научно-производственный эксперименты в условиях физиологического двора ФГБНУ «ФНЦ ВИЖ им. Л. К. Эрнста». Первый — методом групп-периодов (в контрольный период животные получали основной рацион, в опытный — хвойно-энергетическую добавку из расчёта 2,5 мл на 10 кг живой массы), второй эксперимент — на двух группах (контрольной и опытной) бычков по той же схеме. При проведении эксперимента изучали показатели рубцового пищеварения (рН, общее количество летучих жирных кислот, концентрацию аммонийного азота, амилолитическую активность, содержание биомассы простейших и бактерий), биохимические и клинические показатели, среднесуточный и валовой прирост живой массы. Включаемая в состав рациона питания подопытных овец энерго-витаминно-минеральная добавка оказывала благотворное действие на микробиологические и ферментативные процессы в преджелудках, проявляющееся в повышении содержания общей микробной массы, образования летучих жирных кислот — на 0,25‒1,13 мМоль/100 мл, амилолитической активности рубцовой жидкости — на 3,27 Е/мл (Р < 0,05). Отмечалось большее общее количество переваренных питательных веществ и коэффициенты переваримости сухого и органического вещества, сырого протеина, сырого жира — на 6,9 абс.% (Р < 0,05), сырой клетчатки — на 2,5 абс.%. Анализ биохимических показателей крови овец выявил улучшение состояния белкового обмена в организме животных в опытный период, на что указывает повышение концентрации общего белка в крови на 14,1% (Р < 0,05), повышение концентрации альбуминов — на 32,8% (Р <0,05) и альбумино-глобулинового соотношения. У ярок в опытный период отмечали повышение концентрации глюкозы в крови на 11,4%. Среднесуточный прирост бычков опытной групп был на 6,3% выше, чем в контроле. To test their physiological parameters ruminants consumed the basic diet in the control period while in the experimental one they received high-energy supplement from needle leaves. Farm experiment took place on control and experimental groups of male calves by the same scheme. Experiment tested ruminal digestion (рН, total amount of volatile fatty acids, ammonium nitrogen content, amylolytic activity, protist and bacterium concentration), biochemical and clinical parameters, average daily and gross weight gain. Energy-vitamin-mineral supplements positively affected microbiological and enzymatic processes in forestomach, increasing total microbial mass, production of volatile fatty acids — by 0.25‒1.13 mmol/100 ml, amylolytic activity of ruminal fluid — by 3.27 U/ml (Р < 0,05). Higher values were obtained for total amount of digested nutrients and digestion coefficients of dry, organic matter, crude protein, crude fat — by 6.9 % (Р < 0,05), crude fiber — by 2.5 %. Sheep blood biochemical characteristics showed improved protein metabolism during the experimental period, leading to higher concentration of total blood protein by 14.1% (Р < 0,05), albumins — by 32.8% (Р <0,05) and albumin/globulin ratio. Gimmers showed higher concentration of blood glucose by 11.4%. Average daily weight gain of male calves exceeded the control group by 6.3%.

scholarly journals A comparison of carcass proportions in Czech Pied and Montbeliarde bulls with a high carcass weight

2011 ◽  
Vol 50 (No. 3) ◽  
pp. 109-115 ◽  
Author(s):  
G. Chládek ◽  
J. Žižlavský ◽  
J. Šubrt
Keyword(s):  
Growth Rate ◽  
Weight Gain ◽  
Live Weight ◽  
Lower Proportion ◽  
Carcass Composition ◽  
Carcass Weight ◽  
Daily Weight Gain ◽  
Breed Differences ◽  
Carcass Conformation

The aim of the experiment was to compare the carcass composition of 20 Montbeliarde bulls (M) and 20 Czech Pied bulls (C). The carcass weight of the animals in one group varied minimally and was about 380 kg. The Montbeliarde bulls showed a higher growth rate, expressed by a significantly lower (P &lt; 0.01) age at slaughter (562.6 vs. 626 days) while the live weight (682.9 vs. 690.6 kg) and carcass weight (380.4 vs. 382.6 kg) were comparable, which resulted in a significantly higher (P &lt; 0.01) daily weight gain (1.142 vs. 1.045 kg) and net weight gain (0.676 vs. 0.615 kg). The Montbeliarde bulls showed a greater (P &lt; 0.05) height at rump (144.0 vs. 140.2&nbsp;cm), worse carcass conformation according to SEUROP (3.24 vs. 2.84), lower proportion of forequarter (44.7&nbsp;vs. 45.7%) and higher proportion of hindquarter (55.3 vs. 54.3%). As for the carcass composition, no significant inter-breed differences were found in weights and proportions of shanks, meat trimmings, separable fat, bones, round, loin, filet, flank with rib, flank, shoulder and chuck. The Montbeliarde bulls had a significantly lower (P&nbsp;&lt; 0.05) weight and proportion of neck (10.1 vs. 11.1 kg and 5.4 vs. 5.9%) and weight of brisket and rib (17.6 vs. 18.7&nbsp;kg) and proportion of brisket and rib (9.4 vs. 9.9%, P &lt; 0.01). &nbsp; &nbsp;

scholarly journals Analytical aspects of effective stock-raising when applying high-protein fodder

2020 ◽  
Vol 27 ◽  
pp. 00013
Author(s):  
Vera Konkina ◽  
Olga Lukyanova ◽  
Elena Pravdina ◽  
Elena Kuvshinova
Keyword(s):  
Weight Gain ◽  
Soybean Meal ◽  
Physiological State ◽  
Live Weight ◽  
Comprehensive Analysis ◽  
High Protein ◽  
Biologically Active ◽  
Young Pigs ◽  
Increase Productivity ◽  
Pre Treatment

The work provides a comprehensive analysis of efficient organization in the stock-raising industry when fed with high protein fodder. For that end, a dynamic analysis of volume and geographical indicators of soybean production, as well as ways to increase productivity, was initially conducted. The authors believe that biologically active preparations should be used for pre-treatment of seeds and foliar top dressing of plants. This will increase the yield by 2–3 dt/ha and the protein content by 3–4 %. The next step in the analytical procedures was conducting an experiment connected with introduction of soybean meal into the diet of young pigs. This will improve the physiological state of pigs and intensify their live weight gain.

Efficacy of feed additives in enhancing performance of growing pigs

1980 ◽  
Vol 30 (1) ◽  
pp. 95-103 ◽  
Author(s):  
T. L. Veum ◽  
R. Lauxen ◽  
J.-T. Yen
Keyword(s):  
Body Weight ◽  
Weight Gain ◽  
Feed Intake ◽  
Live Weight ◽  
Growing Pigs ◽  
Feed Additives ◽  
Feed Additive ◽  
Control Treatment ◽  
Feed Ratio ◽  
Weight Gains

ABSTRACTThe efficacy of feed additives in enhancing the performance of growing pigs, together with the effect of different protein levels (18 v. 16% from 13 to 18 kg body weight and 16 v. 14% from 18 to 39 kg body-weight), were evaluated in three experiments with 412 pigs. In Experiment 1, from 13 to 39 kg body weight, pigs receiving 55 p.p.m. carbadox (C) produced a greater (P<0·05) average daily live-weight gain than did the non-medicated (NM) pigs and those receiving 275 p.p.m. chlortetracycline-sulphamethazine-penicillin (ASP) with a similar but non-significant (P>0·05) trend n i daily feed intake and gain/feed ratio. The ASP pigs also produced a greater (P<0·05) weight gain than the NM pigs. The higher dietary protein level sequence produced a greater (JP<0·05) weight gain and gain/feed ratio.In Experiment 2, from 16 to 39 kg body weight, NM control pigs achieved high weight gains, and all the feed additive treatments studied [C+106 p.p.m. of the worming agent pyrantel tartrate (C+P); ASP+8 mg of the worming agent levamisole-HCl per kg body weight fed once on day 7 of the experiment (ASP+L); and 113 p.p.m. tylosin+13 p.p.m. of the worming agent hygromycin B] were similar to the NM controls in daily feed intake, weight gain and gain/feed ratio. However, in Experiment 3, the C+P and ASP+L treatments resulted in a greater (P<0·05) weight gain with a trend toward greater daily feed intake than did the NM control treatment from 17 to 35 kg. The weight gain of the ASP+L pigs was also greater (P<0·05) than that of 165 p.p.m. oxytetracycline and NM pigs from 35 to 57 kg. From 57 to 96 kg all the pigs received the same NM control diet and their weight gains were similar. The gain/feed ratio was similar among the treatments within each of the weight periods in Experiment 3. Pigs slaughtered at the beginning and at various stages during Experiments 2 and 3 were free of internal parasites and migration damage.

The use of probiotic drug Monosporin in diets of heifers

2020 ◽  
pp. 3-9
Author(s):  
B. G. Sharifyanov ◽  
F. M. Shagaliev ◽  
G. Kh. Idiyatullin ◽  
V. G. Kakhikalo ◽  
O. V. Nazarchenko
Keyword(s):  
Weight Gain ◽  
Live Weight ◽  
Feed Additives ◽  
Metabolic Energy ◽  
Feed Additive ◽  
Control Group ◽  
Main Task ◽  
Live Weight Gain ◽  
Growth Energy ◽  
Experimental Group

Rearing of replacement young animals in particular of calves based on the scientific notion of development of the organism, knowledge of age-specific physiology of digestion, metabolism of nutrients and needs them in the process of ontogenesis animals. The main task in the development and use of new effective feed additives is to increase the growth energy and livability of young cattle. One of the most reliable tools in this case are probiotic drugs of the new generation. Probiotics in animals activate digestion; strengthen non-specific immunity, which is the result of normalization of the microbiocenosis of the gastrointestinal tract. The purpose of this work was to study the possibility and effectiveness of using a multi-factorial microbiological drug Monosporin produced by Biotechnagro LLC (Krasnodar) in feeding of heifers. In the diets of heifers of experimental groups, the probiotic feed additive Monosporin has been used in quantities of 3,0 g/head/day (the 2nd experimental group) and 5,0 g/head/day (the 3rd experimental group). Heifers of the 1st control group did not receive this additive. It has been found that the expenditures of concentrated feed in heifers of the 2nd experimental group was lower by 3,5 %. Their herdmates of the 3rd experimental group spent concentrates per 1 kg of live weight gain by 5,4 % less compared to the 1st control group. In heifers of the 3rd experimental group have been received 5 g/head/day of probiotic feed additive of multivariate action Monosporin, feed expenditures per unit of live weight gain were the lowest. According to the results of research, it can be assumed that the use of the studied feed additive in these dosages contributes to the better use of metabolic energy and nutrients in the diet when rearing heifers.

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