ХОЗЯЙСТВЕННО-БИОЛОГИЧЕСКИЕОСОБЕННОСТИКОРОВСИММЕНТАЛЬСКОЙ,ГЕРЕФОРДСКОЙПОРОДИИХПОМЕСЕЙ

2019 ◽  
Author(s):  
I.F. GORLOV ◽  
M.I. SLOZHENKINA ◽  
N.I. MOSOLOVA ◽  
A.A. KAIDULINA ◽  
V.S. GRISHIN ◽  
...  
Keyword(s):  
Live Weight ◽  
Carcass Yield ◽  
Slaughter Weight ◽  
Crossbred Cows ◽  
Original Parent ◽  
Beef Herds ◽  
Meat Productivity

В работе приведены исследования по скрещиванию комбинированных пород крупного рогатого скота с мясными с целью создания репродуктивных мясных стад на базе использования помесных телок первого поколения. Во все возрастные периоды коровы симментальской, герефордской пород и их помеси с генотипом симменталы герефорды имели определенные различия по живой массе. Помеси превосходили по данному показателю в возрасте 3, 4 и 5 лет сверстниц симментальской породы на 6,78 3,98 и 3,61 и герефордской, соответственно, на 2,64 2,52 и 1,60. Они обладали хорошими воспроизводительными качествами. Так, в возрасте 205 дней дочери помесных коров по живой массе превосходили потомков чистопородных симментальских и герефордских коров, соответственно, на 21,78 и 3,64 кг. У помесных бычков выход туши был выше, чем у чистопородных симментальских и герефордских сверстников на 3,20 и 2,03, убойная масса на 73,40 и 38,37 кг, а убойный выход на 3,44 и 2,14, соответственно. В результате проведенной оценки показателей, характеризующих мясную продуктивность чистопородного и помесного потомства, можно сделать вывод о характере сочетаемости симментальской и герефордской пород и о том, что помеси, при сравнении их с исходными родительскими формами, имели во всех случаях лучшие показатели, характеризующие мясную продуктивность.The paper presents the research on the crossing of combined breeds with meat in order to create reproductive beef herds based on the use of firstgeneration mixed heifers. In all age periods of the Simmental and Hereford cows and their mixture with the genotype simmentals x the Hereford had certain differences in live weight. Hybrids aged exceeded in this indicator at the age of 3, 4 and 5 years of age peers of the Simmental breed by 6.78 3.98 and 3.61 and Hereford, respectively, by 2.64 2.52 and 1.60. Hybrids had good reproductive qualities. Thus, at the age of 205 days, the daughters of crossbred cows exceeded the descendants of purebred Simmental and Hereford cows by 21.78 and 3.64 kg, respectively. Crossbred bulls had higher carcass yield than purebred Simmental and Hereford peers by 3.2 and 2.03, slaughter weight by 73.40 kg and 38.37 kg, slaughter yield by 3.44 and 2.14, respectively. The result of the evaluation of indicators characterizing the meat productivity of purebred and crossbred offspring, it can be concluded that the nature of the compatibility of the Simmental and Hereford breed and that the hybrids, when compared with their original parent forms, had in all cases the best indicators characterizing the meat productivity of animals.В работе приведены исследования по скрещиванию комбинированных пород крупного рогатого скота с мясными с целью создания репродуктивных мясных стад на базе использования помесных телок первого поколения. Во все возрастные периоды коровы симментальской, герефордской пород и их помеси с генотипом симменталы герефорды имели определенные различия по живой массе. Помеси превосходили по данному показателю в возрасте 3, 4 и 5 лет сверстниц симментальской породы на 6,78 3,98 и 3,61 и герефордской, соответственно, на 2,64 2,52 и 1,60. Они обладали хорошими воспроизводительными качествами. Так, в возрасте 205 дней дочери помесных коров по живой массе превосходили потомков чистопородных симментальских и герефордских коров, соответственно, на 21,78 и 3,64 кг. У помесных бычков выход туши был выше, чем у чистопородных симментальских и герефордских сверстников на 3,20 и 2,03, убойная масса на 73,40 и 38,37 кг, а убойный выход на 3,44 и 2,14, соответственно. В результате проведенной оценки показателей, характеризующих мясную продуктивность чистопородного и помесного потомства, можно сделать вывод о характере сочетаемости симментальской и герефордской пород и о том, что помеси, при сравнении их с исходными родительскими формами, имели во всех случаях лучшие показатели, характеризующие мясную продуктивность.

scholarly journals INFLUENCE OF «YANTOVET» ON THE MEAT PRODUCTIVITY OF RABBITS

2021 ◽  
Vol 246 (2) ◽  
pp. 6-9
Author(s):  
S.P. Arkhipova ◽  
◽  
L.F. Yakupova ◽  
O.A. Gracheva ◽  
◽  
...  
Keyword(s):  
Drinking Water ◽  
Average Daily Gain ◽  
Live Weight ◽  
Study Drug ◽  
Entire Period ◽  
Control Group ◽  
Slaughter Weight ◽  
Meat Productivity ◽  
Daily Gain ◽  
Experimental Group

The introduction of «Yantovet» into the diet of rabbits at a dose of 0,33 ml per 1 kg of live weight has a stimulating effect on the intensity of their growth and productivity. By the end of the experiment, the live weight of the experimental group was higher than that of the control by 13 %. The average daily gain for the entire period of experiments in the experimental group exceeded the same indicator in the control by 38,7 %. The rabbits of the experimental group had a higher level of productivity, as the slaughter weight and slaughter yield of rabbit carcasses in the experimental group in relation to the control group were higher by 16,6 and 2,9 %. The study drug is recom-mended to be used in the diet of rabbits in the composition of drinking water.

THE QUALITY OF THE MEAT OF THE ABERDEEN ANGUS BULL CALVES DEPENDING ON THE BODY TYPE

2021 ◽  
pp. 18-21
Author(s):  
Д.Р. СМАКУЕВ ◽  
А.Ф. ШЕВХУЖЕВ ◽  
В.А. ПОГОДАЕВ
Keyword(s):  
Live Weight ◽  
The Body ◽  
Body Type ◽  
Slaughter Weight ◽  
Group I ◽  
Bull Calves ◽  
Group Ii ◽  
Meat Samples ◽  
Meat Productivity ◽  
Group Chemical

Проведен анализ качественных характеристик мясной продуктивности бычков абердин ангусской породы в зависимости от типов телосложения. Научно-хозяйственный опыт проводился в одном из хозяйств Карачаево-Черкесской Республики в 2020—2021 годах. Из потомства быков крупного (I группа) и мелкого типа (II группа) абердин ангусской породы было сформировано 2 группы по 14 голов. По окончании контрольного выращивания провели контрольный убой бычков в 18-месячном возрасте. Установлено, что бычки I группы достоверно (Р<0,01) превосходили по живой массе аналогов II группы. Молодняк I группы имел более высокую (на 31,4 кг) предубойную массу и более тяжелые туши по сравнению с бычками II группы на 28,3 кг (Р<0,01). По убойной массе бычки I группы превосходили сверстников II на 26,5 кг (Р<0,01), а по убойному выходу — соответственно на 1,98 абс.%. При обвалке молодняка I группы было получено мякоти больше на 9,9 кг (Р<0,01) по сравнению с данными по обвалке туш бычков II группы. Химический анализ различных проб мяса показал, что туши бычков I группы содержали несколько меньше жира по сравнению с тушами молодняка II группы, как общего количества в средних пробах, так и внутримышечного в пробах из мускулов. Различия между группами по другим показателям были незначительными. Наибольшее количество жира было в отрубах, дающих лучшие сорта мяса, — бедренном и спинно-грудном, несколько меньше содержалось в лопаточной части, дающей мясо второго сорта. По влагосвязывающей способности, цвету и нежности мяса различий между группами не обнаружено. The analysis of the qualitative characteristics of the meat productivity of the Aberdeen Angus bull calves, depending on the body types, is carried out. Scientific and economic experience was conducted in one of the farms of the Karachay-Cherkess Republic in 2020-2021. From the offspring of large (group I) and small type bulls (group II) of the Aberdeen Angus breed, 2 groups of 14 heads were formed. At the end of the control cultivation, a control slaughter of steers was carried out at the age of 18 months. It was found that the bulls of group I were significantly (P<0.01) superior in live weight to the analogues of group II. The young animals of group I had a higher pre-slaughter weight (by 31.4 kg) and heavier carcasses compared to the steers of group II by 28.3 kg (P<0.01). According to the slaughter weight, the bulls of the first group exceeded the peers of the second by 26.5 kg (P<0.01), and according to the slaughter yield — by 1.98 abs.%, respectively. When deboning young animals of the first group, more pulp was obtained by 9.9 kg (P<0.01) compared with the data on deboning the carcasses of bulls of the second group. Chemical analysis of various meat samples showed that the carcasses of group I steers contained slightly less fat compared to the carcasses of young animals of group II, both total in average samples and intramuscular in muscle samples. The differences between the groups on other indicators were insignificant. The greatest amount of fat was in the cuts that give the best varieties of meat — femoral and dorso-thoracic, slightly less was contained in the scapular part, which gives the second grade meat. No differences were found between the groups in terms of the moisture binding ability, color and tenderness of the meat.

Meat productivity and quality of meat of a breeding young semi-shirt-haired sheeps

Vsyo o myase ◽  
2020 ◽  
pp. 46-49
Author(s):  
Dabaev O.D. ◽  
◽  
Khamiruev T.N. ◽  
Aslaliev A.D. ◽  
◽  
...  
Keyword(s):  
Chemical Composition ◽  
Live Weight ◽  
Slaughter Weight ◽  
Calorie Content ◽  
Comparative Aspect ◽  
Meat Productivity

The results of the study of the meat productivity of crossbred young animals obtained from the crossing of ewes of the Aginsk breed with the producers of the Kazakh breed of the Bayys type in a comparative aspect with purebred analogs of the original breed at the age of 6 and 18 months are presented. It has been established that crossbred individuals have a significant advantage in terms of slaughter qualities in the analyzed age periods. So, for the pre-slaughter live weight at the age of 6 months. the superiority was 3.0 %, at the age of 18 months. – 6.2 %, for slaughter weight and slaughter yield – 3.4 and 0.2 %; 7.8 and 0.8 % respectively. Lamb obtained from the slaughter of young sheep of the control and experimental groups at the age of 6 months, depending on the weight of carcasses, corresponded to the first class. The chemical composition of the meat indicates the higher calorie content of meat obtained from crossbred young animals. At the same time, the ratio of protein and fat was optimal when slaughtering experimental young animals at the age of 6 months. Tasting evaluation of broth and boiled meat did not reveal significant differences in organoleptic indicators of control and experimental samples.

EFFICIENCY OF FISHING AND FEEDING OF DISPOSED CATTLE

2020 ◽  
Author(s):  
Д.Р. СМАКУЕВ ◽  
А.Ф. ШЕВХУЖЕВ ◽  
М.Б. УЛИМБАШЕВ
Keyword(s):  
Live Weight ◽  
Fat Deposition ◽  
Carcass Yield ◽  
Feeding Groups ◽  
Different Types ◽  
Meat Productivity

Одним из путей увеличения объема производства говядины является использование откормочного контингента выбракованных коров молочного направления продуктивности. Была изучена мясная продуктивность выбракованных коров красной степной и бурой швицкой пород при откорме и сочетании нагула с откормом. Установлено, что при сочетании нагула и откорма как красные степные, так и бурые швицкие превзошли по живой массе своих сверстниц с откорма на 8 (Р<0,01) и 13,3 кг (Р<0,001), соответственно. Независимо от породной принадлежности наибольшими среднесуточными приростами живой массы отличались коровы из групп откорма, которые превзошли животных из групп нагула с откормом в среднем на 134—168 г (Р<0,001). Результаты контрольного убоя свидетельствуют о более высоком выходе туш от выбракованных коров, находившихся на нагуле и откорме, их значения превалировали над сверстницами из групп стационарного откорма в среднем на 12,6—19,6 кг (Р<0,05). Наряду с этим меньшее отложение жира в группах нагула и откорма обусловило больший убойный выход на 1,4—2,5% (Р<0,05). Выход мякотной части был наибольшим от выбракованных коров, находившихся на нагуле и заключительном откорме, превосходство которых над особями стационарного откорма составило 16,6—23,1 кг (Р<0,05—0,01). Уровень коэффициента мясности у этих животных превалировал над значениями животных из групп откорма в среднем на 0,71—1,03 ед. (Р<0,01). One of the ways to increase the volume of beef produced is to use the feeding contingent of rejected cows of the milk direction of productivity. The aim of the research was to establish the meat productivity of culled cows of the red steppe and brown Schwyz breeds with different types of fattening — in particular when feeding and combining feeding and fattening. Object of research: cows of brown Schwyz and red steppe breeds. Options for fattening were actually fattening, lasting 61 days, and feeding in combination with fattening in the ratio of 61:30 days. It was found that when feeding and feeding were combined, both the steppe red and brown Schwyz surpassed their peers in live weight by 8 (Р>0,01) and 13,3 kg (Р>0,001), respectively. At the same time, regardless of breed, the highest average daily gains in live weight differed in cows from fattening groups, which surpassed animals from feeding groups with fattening by an average of 134—168 g (Р>0,001). The results of the control slaughter indicate a higher carcass yield from culled cows that were on feeding and fattening, their values ​​prevailed over peers from stationary feeding groups by an average of 12,6—19,6 kg (Р>0,05). Along with this, less fat deposition in the feeding and fattening groups led to a greater slaughter yield — by 1,4—2,5% (Р>0,05). The yield of the most valuable — the meat part — was the largest from the culls that were on feeding and final fattening, the superiority of which over individuals of stationary fattening was 16,6—23,1 kg (Р>0,05—0,01). The level of meat ratio in these animals prevailed over the values ​​of animals from fattening groups by an average of 0,71—1,03 units (Р>0,01).

PSVI-15 Combined effect of C73T × C528T polymorphisms in the leptin gene with quantitative and qualitative indicators of meat productivity

2021 ◽  
Vol 99 (Supplement_3) ◽  
pp. 234-235
Author(s):  
Alexandra Lapshina ◽  
Vladimir Kolpakov ◽  
Kinispay Dzhulamanov ◽  
Nikolay Gerasimov ◽  
Marina Dubovskova
Keyword(s):  
Financial Support ◽  
Raw Materials ◽  
Live Weight ◽  
Combined Effect ◽  
Carcass Weight ◽  
Carcass Yield ◽  
Angus Cattle ◽  
Combined Genotypes ◽  
Meat Productivity

Abstract The LEP is a highly polymorphicgene and it is associated with genetic differences in various productivetraits in cattle. The aim of research was to study the combined effect of C73T and C528T polymorphisms in leptin gene on meat productivity and carcass grade in Aberdeen-Angus cows and heifers. Heifers (n = 49) were slaughtered at the age of 20 months and cows (n = 30) after the first calving (3 years). There were seven haplotypes C73T (GenBank AF120500) × C528T (GenBank AB070368) identified in cows with different frequency. The maximum frequency was established in combined genotypes CT/CT (0.37), TT/CC (0.27) and CT/CC (0.13). The most massive carcasses (337.5 kg) were obtained from cows-carriers of the CT/CC haplotype, which exceeded their peers by 14.8–24.7 kg (4.59–7.90%; P &gt;0.05). However, cows carrying the CT/CC genotype had a minimum carcass yield of 49.8%. There were eight haplotypes identified in heifers. The highest frequency was in combinations CT/CT (0.26), TT/CC (0.20), CC/TT (0.20), CC/CT (0.12), TT/CT (0.10). Heifers carrying the TT/CT genotype were characterized by the highest live weight (568.9 kg) and carcass weight (331.2 kg), exceeding the indicators of peers by 8.9–43.5 kg (1.59–8.28%; P &lt; 0.05, P &gt; 0.05) and 10.9–22.2 kg (3.40–7.18%; P &lt; 0.05, P &gt; 0.05), respectively. The maximum carcass yield was recorded in carriers of the CT/CC haplotype (60.7%). The best carcasses grade were observedin heifers with a combination of CC/TT and CT/CT genotypes. The highest categories (Prime and TopChoice) were assigned to 70.0 and 69.2% of carcasses, respectively. The superiority of haplotype CT/CT in the quality of meat raw materials was confirmed in cows. Thus, the combination of C73T and C528T polymorphisms in the leptin gene is associated with intra-breed variability in live weight, carcass weight and yield, and carcass grade in Aberdeen-Angus cattle. This research was performed with financial support from the project 0526-2021-0001 of RAS.

QUALITATIVE BEEF INDICATORS OF THE MIXED BREEDS CATTLE

1970 ◽  
pp. 63-67
Author(s):  
I. F. Gorlov ◽  
М. I. Slozhenkina ◽  
D. V. Nikolaev ◽  
N. I. Mosolova ◽  
А. А. Kaydulina ◽  
...  
Keyword(s):  
Meat Quality ◽  
Quality Indicators ◽  
Live Weight ◽  
The Body ◽  
Crossbred Cows ◽  
Black And White ◽  
The Third ◽  
Genetic Potential ◽  
Meat Productivity ◽  
Experimental Group

The article presents results of a study of the quality indicators of cross-bred steers raised in the conditions of modern fattening technologies. For the experiment, four groups of experimental young animals were selected: the first group included animals obtained from crossing Kalmyk bulls with crossbred cows from crossing Salers breeds with Simmental; the second group-bulls obtained from crossing Kalmyk bulls with crossbred cows, from crossing Salers bulls with black-and-white cows; the third – animals obtained as a result of crossing Hereford bulls with crossbred cows obtained from Salers bulls with Simmental cows; the fourth-bulls obtained as a result of crossing Hereford bulls with crossbred cows from crossing Salers bulls with Red pied cows. Each experimental group had 30 goals. It was found that the combination of the origin of crossbred animals of ½ blood of the Hereford breed with crossbred animals with ½ blood of the Salers and Simmental breeds contributes to a faster accumulation of live weight compared to their peers, which confirms their high "precocity" and better metabolism in the body. Over the entire period of the experiment, the bulls of the third experimental group outperformed their peers of other groups in terms of live weight dynamics, slaughter indicators and meat quality. Crossbreeding of Hereford bulls with cows with the genotype ½ Salers with Simmental breed contributed to the highest manifestation of the genetic potential of meat productivity in comparison with the studied peers.

PRECOCITY AND MEAT PRODUCTIVITY OF SHEEP OF ZONED SEMI-FINE WOOL BREEDS

2020 ◽  
pp. 25-28
Author(s):  
A.YA. KULIKOVA A. ◽  
Keyword(s):  
Live Weight ◽  
Slaughter Weight ◽  
The North ◽  
Growth Intensity ◽  
Meat Productivity

The assessment of growth intensity and meat productivity of young sheep of the southern meat breed (YM) in comparison with peers of the North Caucasian meat and wool breed (SK), Soviet meat and wool breed (SMSH) and Kuban Lincoln (KL) is given in order to determine their eff ectiveness in purebred breeding. The advantage of young YUM breed in live weight – by 9.5-12.0%, growth intensity – by 9.2%, slaughter weight – by 10.0%, feed payment – by 7.2% compared to peers of zoned semi-fi ne-wool breeds was determined.

GROWTH AND MEAT PRODUCTIVITY OF YOUNG HEREFORD BREED IN CONDITIONS OF THE SOUTH OF WESTERN SIBERIA

2021 ◽  
pp. 15-18
Author(s):  
Х.Х. Тагиров ◽  
Н.Ю. Николаева ◽  
Р.Р. ИШБЕРДИНА
Keyword(s):  
Western Siberia ◽  
Live Weight ◽  
Age Group ◽  
Maximum Mass ◽  
Slaughter Weight ◽  
Opposite Trend ◽  
Group I ◽  
Tomsk Region ◽  
Morphological Composition ◽  
Meat Productivity

Изучены особенности роста и продуктивные качества бычков и кастратов герефордской породы, выращенных в условиях Томской области. Исследования проводили на 2 группах животных от 15- до 24-месячного возраста. В I группу входили бычки, во II — кастраты. Средняя живая масса бычков-кастратов в начале и в конце периода исследований превосходила массу бычков I группы. Наибольший прирост живой массы с 15-месячного возраста наблюдался у бычков I группы, начиная с 20 мес, кастрированные животные показали лучшие результаты. Абсолютный ежемесячный прирост живой массы был выше в 1,5—2 раза у бычков I группы до 19 мес, после чего наблюдалась обратная тенденция. За весь период исследований от бычков I группы получен прирост живой массы в среднем 202,7 кг. Бычки-кастраты за этот же период имели прирост 210,5 кг. По показателям мясной продуктивности молодняк I группы отличался наибольшей предубойной массой, массой парной туши и убойной массой на 59,7, 20 и 10,1 кг соответственно. Бычки-кастраты превосходили сверстников I группы по содержанию внутреннего жира (на 10 кг), выходу туши (на 2,4%) и убойному выходу (на 4,7%). При изучении морфологического состава туш установлено, что бычки I группы характеризуются максимальной массой охлажденной туши. Однако по выходу мышечной ткани доминировали бычки-кастраты: содержание мякоти у них было выше на 2,2%, а индекс мясности больше на 0,4 ед. The peculiarities of growth and productive qualities of Hereford calves and castrates raised in the Tomsk region were studied. The studies were carried out on 2 groups of animals from 15 to 24 months of age. Group I consisted of gobies, and group II consisted of castrati. The average live weight of castrate bulls at the beginning and at the end of the study period exceeded the weight of group I bulls. The greatest increase in live weight from the age of 15 months was observed in group I calves, starting from 20 months the neutered animals showed the best results. The absolute monthly increase in live weight was 1.5—2 times higher in group I bulls up to 19 months, after which the opposite trend was observed. Over the entire period of research, an average live weight gain of 202.7 kg was obtained from group I calves. Castrated gobies had an increase of 210.5 kg over the same period. According to the indicators of meat productivity, the young animals of group I had the highest pre—slaughter weight, the weight of a paired carcass and the slaughter weight by 59.7, 20 and 10.1 kg, respectively. Castrate bulls outperformed their peers in group I in terms of internal fat content (by 10 kg), carcass yield (by 2.4%), and slaughter yield (by 4.7%). When studying the morphological composition of carcasses, it was found that group I gobies are characterized by the maximum mass of the cooled carcass. However, the output of muscle tissue was dominated by castrate gobies: their pulp content was higher by 2.2%, and the meat index was higher by 0.4 units.

scholarly journals Development and meat production of lamps at feeding with prebiotic preparation Kormomiks-MOS

2020 ◽  
pp. 32-34
Author(s):  
Oleg Igrisovich Biryukov ◽  
Oksana Petrovna Biryukova
Keyword(s):  
Live Weight ◽  
Meat Production ◽  
Slaughter Weight ◽  
Meat Productivity ◽  
Positive Effect

The results of the application of the prebiotic preparation “Kormomiks MOS” for the raising of rams of the Stavropol breed up to 8 months of age are presented. Its positive effect on the gain in live weight and meat productivity has been established. In terms of live weight, the superiority of the animals of the experimental groups over the control was 2.56 kg, or 7.5% (P> 0.999). Experienced animals had the best meat qualities. For pre-slaughter weight, the excess was from 5.2%, for the mass of chilled carcasses - from 1.16 kg (8.3%).

Local mineral feed additives in the rations of steers of Hereford breed

2020 ◽  
pp. 28-39
Author(s):  
M. Grigoryev ◽  
N. Chernogradskaya
Keyword(s):  
Economic Effect ◽  
Live Weight ◽  
Negative Influence ◽  
Feed Additives ◽  
The Body ◽  
Control Group ◽  
Mineral Salts ◽  
Meat Productivity ◽  
Experimental Group ◽  
Mineral Feed Additives

Animals imported to Yakutia from other regions fall into feeding and housing conditions that differ from their usual agro-climatic conditions, which causes the problem of their adaptation. Yakutia is one of the areas where the feed of its own production has a lack of basic minerals, which affects the health and productivity of animals, which has an additional negative influence on the adaptation process of imported cattle. In order to replenish macro- and microelements in the body, it is necessary to introduce various local mineral feed additives, premixes, and use mineral salts into the ration. Under the conditions of Central Yakutia the influence of local mineral feed additives (zeolite of the Khonguruu Deposit in the Suntar district and sapropels of local lakes) containing macro- and microelements that increase the meat productivity of steers has been studied. As a result of the research the influence of local mineral feed additives on meat productivity and physiological condition of Hereford steers has been established. Influence of zeolite and sapropel in a complex with mineral salts on digestibility of nutrients of the ration and use of nitrogen, calcium and phosphorus by experimental animals has been defined. The influence of feed additives on the quality of meat products has been studied. The results have shown that the use of local mineral feed additives in the composition of ration of steers during the fattening period at a dose of 0,7 g zeolite per 1 kg of live weight of the animal and 200 g of sapropel in combination with 10 g of mineral salts contributed to the gain in live weight, carcass weight, carcass yield, yield of edible parts, and economic efficiency of fattening. For the entire period of the experiment the gain in live weight in groups was: in control group 2222,9 kg, in the 1st experimental group 2396,2 kg, in the 2nd experimental group 2471,1 kg. The total economic effect for the 1st experimental group for the period of experiment amounted to 44,3 thousand Rubles, for the 2nd experimental group 78,0 thousand Rubles or per 1 head/day 14,06 and 24,76 Rubles, respectively.

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