scholarly journals DAIRY INDEX OF COWS WITH DIFFERENT GENOTYPES

2021 ◽  
Vol 247 (3) ◽  
pp. 65-69
Author(s):  
L.R. Zagidullin ◽  
◽  
R.R. Shaydullin ◽  
T.M. Akhmetov ◽  
Ch.A. Kharisova ◽  
...  
Keyword(s):  
Body Weight ◽  
Milk Production ◽  
Milk Yield ◽  
Live Weight ◽  
The Body ◽  
Marker Genes ◽  
Production Index ◽  
Black And White ◽  
Homozygous Genotype ◽  
White Breed

The live weight and milk production index of black-and-white and Tatarstan type cows of the Kholmogory breed with different genotypes for genes CSN3, DGAT1, PRL, GH were studied. It was found that cows with the homozygous genotype CSN3 AA, DGAT1 AA, PRL AA, GH LL are characterized by a high milk yield index. Unlike other marker genes, the somatotropin gene had a greater effect on the body weight and milk production index of cows. Thus, in terms of live weight in the black-and-white breed, the superiority of individuals with the GH LL genotype by 43 kg (P <0.001), GH LV by 42 kg (P <0.001) was noted, and in terms of milk production, the advantage of cows with the GH LL genotype (984 and 1008) over GH LV by 40 (P <0.01); on the Kholmogory breed above GH LV by 26 (P <0.05), GH VV by 42 (P <0.05). Consequently, cows with allelic A variant of the CSN3, DGAT1, PRL genes and allelic L GH genes in their genomes exhibit high milk production at optimal live weight.

Influence of the age at the first insemination and live weight on milk productivity of cows

2020 ◽  
Vol 50 (2) ◽  
pp. 57-63
Author(s):  
L. L. Petrukhina ◽  
S. L. Belozertseva
Keyword(s):  
Milk Production ◽  
Milk Yield ◽  
Live Weight ◽  
Reproductive Function ◽  
Reproductive Capacity ◽  
Milk Productivity ◽  
Black And White ◽  
Irkutsk Region ◽  
White Breed

The materials of the long-term (2008–2018) research into the reproductive function of cattle of the black-and-white breed of Baikal type in Irkutsk region are presented. The influence of the age at the first insemination and live weight on cows’ milk productivity, lifelong productivity and productive longevity was studied. The experiment was conducted on the basis of materials from the breeder-farm for breeding cattle of Baikal type on the groups of cows of different ages: up to 14–20 months and older. Cows inseminated at 16 months (7917 kg) had the best milk yield in the first lactation. The largest milk yield was obtained from inseminated cows with live weight of 401-410 kg. Milk production of these heifers was 7902 kg in the first lactation, 8792 kg – in the second and 8710 kg – in the third. It was revealed that age of cows and their live weight at the first successful insemination had a positive effect on the lifelong productivity and productive longevity of cows. Cows whose age at the first successful insemination was 15 or 16 months had a longer duration of productive use (productive life span of animals was 2561–2558 days, respectively). The highest lifelong productivity (34379–34585 kg) was obtained from the cows of this group. The economic efficiency of lifelong milk production was determined depending on the age of the first insemination. The highest lifelong milk productivity was obtained from cows, which were first inseminated at the age of 15–16 months. The largest revenue from sales of additional products was also received from the cows of this group (366,058–370,480 roubles per head). The results obtained allow to develop effective methods for increasing reproductive capacity of cattle.

PRODUCTIVE LONGEVITY IN BROAD-BODIED AND NARROW-BODIED COWS OF BLACK-AND-WHITE BREED

2020 ◽  
Author(s):  
Н.Ю. ЧУПШЕВА ◽  
А.С. КАРАМАЕВА ◽  
С.В. КАРАМАЕВ
Keyword(s):  
Milk Yield ◽  
Live Weight ◽  
The Body ◽  
Body Structure ◽  
Body Type ◽  
Black And White ◽  
Registration Data ◽  
White Breed ◽  
Resistance Value ◽  
Hematological Values

Изучено продуктивное долголетие коров широкотелого и узкотелого типов телосложения в условиях интенсивной технологии производства молока. Объектом исследований служили коровы черно-пестрой породы, выбракованные из стада по разным причинам. Животные были разделены на 2 группы по типам телосложения при помощи индексов, вычисленных по результатам промеров. Анализ данных зоотехнического учета показал, что различия в строении тела и конституции формируются у них в процессе роста и развития. Выявлено, что живая масса первотелок широкотелого типа была больше, чем узкотелого, на 27,3 кг (5,3%; Р<0,01). При этом животные узкотелого типа превосходили своих сверстниц по высоте в холке на 2,7 см (2,0%; Р<0,001), глубине груди — на 2,4 см (3,3%; Р<0,001), косой длине туловища — на 2,2 см (1,4%; Р<0,05), но уступали им по ширине груди на 5,4 см (13,9%; Р<0,001), ширине в маклоках — на 1,7 см (3,2%; Р<0,001), обхвату груди — на 5,9 см (3,1%; Р<0,001). Гематологические показатели, независимо от типа телосложения коров, были в пределах физиологической нормы. Установлено, что показатели резистентности у животных широкотелого типа были достоверно выше по сравнению с коровами узкотелого типа. Это обусловило более высокую жизнеспособность особей широкотелого типа. Продолжительность жизни у них была дольше на 25,0% (Р<0,001), а период продуктивного использования — на 1,6 лактации (Р<0,001). В результате пожизненный удой коров широкотелого типа был выше на 6576 кг молока (33,4%; Р<0,001), несмотря на меньшую величину среднего удоя за лактацию на 12,5% (Р<0,001). Productive longevity in broad-bodied and narrow-bodied cows under the conditions of intensive milk production technology was studied. Black-and-white breed cows culled from the herd due to various reasons were used as the object of research. The animals were split into 2 groups according to their body types using the indices calculated according to the results of measurements. The analysis of zootechnic registration data showed that the differences in body structure and constitution are formed in the process of growth and development. It was found out that the live weight of broad-bodied first-calf cows exceeded the live weight of narrow-bodied cows by 27.3 kg (5.3%; P<0.01). Apart from that, narrow-bodied animals were superior to their herdmates in height at the withers by 2.7 cm (2.0%, P<0.001), chest depth — by 2.4 cm (3.3%; P<0.001), oblique torso length — 2.2 cm (1.4%; P<0.05), but were inferior in chest breadth by 5.4 cm (13.9%; P<0.001), head of femur width — by 1.7 cm (3.2%; P<0.001), and chest circumference — by 5.9 cm (3.1%; P<0.001). Without regard to the body type of the cows, their hematological values were within the physiological range. It was found, that resistance value in broad-bodied animals were reliably higher compared to those in narrow-bodied cows. This determined the higher viability of broad-bodied animals. Their life duration was longer by 25.0% (P<0.001), and the period of productive use — longer by 1.6 lactations (P<0.001). As a result, lifetime milk yield in broad-bodied cows was higher by 6576 kg of milk (33.4%; P<0.001) despite the value of average milk yield per lactation that was lower by 12.5% (P<0.001).

scholarly journals Comparative evaluation of selections groups for milking of full-age cows of various breeds

2021 ◽  
pp. 71-79
Author(s):  
A. S. Durov ◽  
V. S. Deeva
Keyword(s):  
Milk Production ◽  
Milk Yield ◽  
Milk Fat ◽  
Live Weight ◽  
Population Based ◽  
Black And White ◽  
Novosibirsk Region ◽  
White Breed ◽  
Selection Parameters ◽  
Breeding Groups

An assessment of the cow population based on exterior and productive characteristics in the formation of production groups identified by the level of milk yield was carried out. It is established that the selection parameters for the yield of milk in the breeding group of Mature cows of Simmental breed in Novosibirsk region for black-motley breed on 15% exceeds the requirements of the standard, red steppe -17.9, Simmental Khakassia - 23.5 %. The analysis of interbreeding differences by breeding groups shows that animals of the black-and-white breed significantly outperform their peers of other breeds in terms of chest width behind the shoulder blades, chest girth, milk yield and milk production index. Animals of the red steppe breed have superiority in live weight, width in makloks, oblique length of the trunk, oblique length of the back, fat content of milk, milk fat. Simmental cows bred in the Novosibirsk region surpass their peers in height at the withers, and simmentals of Khakassia are the leaders in height at the rump, chest depth, waist circumference, and exterior assessment. The assessment of the division of animals of the evaluated breeds into breeding groups by milk yield allows us to note that the leadership of the black-and-white breed is not so obvious among plentiful individuals. Cows of breeding groups of red steppe and Simmental breeds have the same productivity with black-and-white milk yield and milk yield index, and red steppe cows surpass their peers in milkfat content and milk fat. The selection of groups by milk yield showed the consolidation of the black-and-white breed by productive and exterior characteristics. The red steppe and Simmental breeds have a high potential for improvement. their breeding groups closely approach the analogues of the black-and-white breed in terms of milk production.

scholarly journals EFFECT OF THE DRUG "E-SELENIUM" ON THE DISPERSION OF MILK FAT IN COW'S MILK

2021 ◽  
Vol 245 (1) ◽  
pp. 71-76
Author(s):  
L.G. Kashirina ◽  
◽  
K.I. Romanov ◽  
Keyword(s):  
Milk Fat ◽  
Live Weight ◽  
The Body ◽  
Quantitative Composition ◽  
Black And White ◽  
Fat Globules ◽  
White Breed ◽  
Total Fat ◽  
The Relationship ◽  
Experimental Group

The antioxidant drug "E-selenium" was used to reduce the processes of LPO in the body of fresh cows. Two groups were formed from the analogous cows of the black-and-white breed: The Control was intact, Experienced received the antioxidant drug injection at a dose of 10 ml at the rate of 1 ml per 50 kg of live weight per head for 4 months of lactation from the second. The diets of animals of all groups were the same, balanced in nutrients and met the standards of the RAAS. The duration of the experiment was 150 days. During the period from the 3rd to the 5th month of lactation, there was a positive dynamic in increasing the number of fat globules in the milk of cows of the Experimental group. By the end of the 4th month, it was higher than the Control by 8.9 %. This confirms the active effect of the drug "E-selenium", which contributes to a positive dynamic in increasing the size of fat globules. Non-enzymatic antioxidant tocopherol is an active element of the anti-oxidative system. Selenium stimu-lates the body's own antioxidant system. In both experimental groups, the relationship between the concentration of peroxidation products and the quantitative composition of fat globules and their size was established. In the milk of cows of the Experimental group, the oxidation processes were inhibited by neutralizing the products (POL), increasing the number of large fat globules and the total fat content in the milk.

scholarly journals Assessment of selection groups of mature cows of various breeds, differentiated by milk fat

2020 ◽  
pp. 73-81
Author(s):  
A. S. Durov ◽  
V. S. Deeva
Keyword(s):  
Milk Yield ◽  
Milk Fat ◽  
Live Weight ◽  
Black And White ◽  
Breeding Group ◽  
Novosibirsk Region ◽  
White Breed ◽  
The Republic ◽  
Selection Parameters ◽  
Breeding Groups

The assessment of black-and-white, red steppe, and Simmental cattle, differentiated by milk fat was carried out. Three groups were formed: selection, production and marriage. The selection parameters are calculated using the standard deviation. The calculated parameters of selection of animals of the breeding group for milk fat in adult black-and-white cows are at least 179 kg, red steppe - 186, Simmental breed from the Novosibirsk region - 143, the Republic of Khakassia - 176 kg. Cows of the red steppe breeding group are leading in productivity. Their milk fat index is 216.8 kg (P ≥ 0.95). In animals of the black-and-white breed, the milk fat productivity is 193.2 kg. In the Simmental Republic of Khakassia it is 193.8, in the Novosibirsk region - 163.5 kg. Analysis of interbreed differences in cows of breeding groups shows that animals of the black-and-white breed surpass their peers in chest width behind the shoulder blades, milk yield and milk production index. Animals of the red steppe breed are the best in milk fat, live weight, width in shanks, oblique body length, oblique rear length, chest girth, milk fat content. Simmental cows bred in the Novosibirsk region lead over their peers in height at the withers, and Simmental cows in Khakassia - in height at the sacrum, chest depth, cannon girth, assessment of the exterior. Evaluation of the production groups of animals for milk fat allows to note that the selection group of the black-and-white breed, despite the superiority in milk yield, is inferior to the peers of the red steppe and Simmental in terms of the evaluated character. However, the cows of the black-and-white breed of the production group surpass their peers in milk fat and most other signs. The formation of breeding groups for milk fat enables to note the consolidation of the black-and-white breed in terms of productive and exterior characteristics. The Red Steppe and Simmental breeds have a high potential for improvement. These breeding groups are worthy of competing with the contemporaries of the black-andwhite breed in milk fat productivity.

scholarly journals The influence of genotypic factors on the forming of the economic use of values of ukrainian bleck and wheat milk breeds

2018 ◽  
pp. 6-13 ◽  
Author(s):  
N. Klopenko ◽  
R. Stavetska ◽  
M. Bushtruk ◽  
I. Starostenko ◽  
O. Babenko
Keyword(s):  
Milk Yield ◽  
Milk Fat ◽  
Production Efficiency ◽  
Live Weight ◽  
Dispersion Analysis ◽  
Fat Content ◽  
The Body ◽  
Body Measurements ◽  
Black And White ◽  
Selection Of

The evaluation of dairy cows` exterior plays a key role in the system of breeding because well-defined breed typology and high exterior evaluation cause high production efficiency. The objective of the study was to evaluate the exterior of the cows in Ukrainian Black and White dairy breed, to analyze the effectiveness of the selection of first-calf cows according to the body measurements and to study the influence of genotype factors on the formation of the exterior. For research purpose animal groups were formed on the principle of analogues, taking into account the part of Holstein inheritance, parentage, linear belonging, and age. Depending on the part of Holstein inheritance researched livestock was divided into three groups: 75,0-87,4 %, 87,5-99,9 % and 100 %. As a result of our own research it has been established that simultaneously with an increasing of the part of Holstein inheritance the body measurements increase too. It indicates about the improving effect of the Holstein breed on the formation of the exterior in the Ukrainian black-and-white milk breed. The first-calf cows with part of Holstein inheritance 100 % have advantages over the cows with the same age with part of Holstein inheritance 75,0-87,4 % with the withers height – 4 cm (P < 0,001), sacrum height – 4 cm (P <0.001), depth of chest – 1 cm, width of chest – 1 cm, width of hips – 1 cm, length of thoracic – 3 cm, chest girth – 2 cm, width of pins – 1 cm (P <0,001); the advantage over the first-calf cows with part of Holstein inheritance 87,5-99,9 % was 3 cm in withers height, 2 cm in sacrum height and 1 cm in all other cases. An increasing of the part of Holstein inheritance is accompanied by an increasing of milk yield, milk fat and milk protein. The higher milk yield had cows with the part of Holstein inheritance 100 % – by 294 kg compared to cows of the same age with the part of Holstein inheritance 87,5-99,9 % and by 2017 kg (P < 0,001) compared to cows of the same age with the part of Holstein inheritance 75,0-87,4 %. Fat content in milk of cows with the part of Holstein inheritance 100 % was lower by 0,02 % compared to cows with the part of Holstein inheritance 87,5-99,9 % and 0,21 % (P < 0,001) compared to cows with the part of Holstein inheritance 75,0-87,4 %, it was expected – the higher milk yield, the lower fat content in milk. The effectiveness of the simultaneous complex selection of dairy cattle on several grounds depends on the existence of correlation between them. The correlation between the body measurements of cows and 305-milk yield is positive, but varied in strength. The average strength of the correlation is observed between the milk yield and withers height (r = +0,233, P < 0,001), milk yield and length of thoracic (r = +0,332, P < 0,01), in other cases, the strength of the correlation is weak, but with sacrum height (P < 0,01), chest girt (P < 0,01) and depth of chest (P < 0,05) is significant. One-factor dispersion analysis was carried out to determine the level of determinism of live weight and body measurements by genotype factors. According to the results it was established that the influence of the bull's origin on the live weight of their first-calf daughters was 72,8 %, on the body measurements – 31,5- 91,3 %, the influence of line belonging amounted 81,0 % and 36,1-69,4 %, the influence of the part of Holstein inheritance was 26,3 % and 15,9-39,5 %, respectively. All genotypic factors have a significant effect on the live weight of the first-calf cows (P < 0,05 ... 0,001), withers height (P < 0,05...0,01), width of chest (P < 0,01...0,001) and width of pins (P < 0,05...0,001). Thus, the greatest influence on the body measurements and live weight of first-calf cows has the bull's origin, just below – the line belonging, the lowest – the part of Holstein inheritance, but in all cases it is rather high. It was established that for improvement of the cows` exterior will be promote the using of bulls and lines that have the desirable indicators of live weight and body measurements of daughters, as well as animals with a high part of Holstein inheritance, which have by good exterior characteristics. For effective selection it is needed to use of detected correlations between milk yield and body measurements. Key words: exterior, body measurements, part of Holstein inheritance, bull's origin, milk productivity.

Realization of the potential of cows of Holstein breed of different generations in terms of productive traits

2021 ◽  
pp. 28-35
Author(s):  
O. V. Nazarchenko ◽  
A. N. Rusanov
Keyword(s):  
Milk Yield ◽  
Mass Fraction ◽  
First Generation ◽  
Live Weight ◽  
High Productivity ◽  
Black And White ◽  
Holstein Breed ◽  
Genetic Potential ◽  
White Breed ◽  
Productive Traits

Breeding work with dairy cattle in the Kurgan region is aimed at breeding animals that combine the adaptive properties and valuable traits of cattle of Black-and-White breed with a high proportion of genes of Holstein breed. Such animals are characterized by high productivity and suitability for intensive technology of their housing. The purpose of the research was to determine the indicators of milk productivity of first-calf heifers of different generations of Holstein breed, imported to the pedigree farms of the Kurgan region, as well as to determine the degree of realization of the genetic potential of animals. Scientific research has been carried out in the herd of CJSC “Glinka” (Kurgan), where highly productive cattle of Black-and-White and Holstein breeds are bred. The subject of research was the first-calf heifers of the imported Holstein breed of German selection of different generations, as well as the herdmates of Black-and-White breed. It has been found that the realization of the genetic potential for milk yield in Holstein cows of German breeding was higher and amounted to 76,4 %, in cows of Black-and-White breed 69,9 %. The highest milk yield for 305 days of lactation has been observed in the second generation of Holstein heifers 8905 kg, which exceeded the milk yield of herdmates of the second and third generations by 113 kg or 1,26 % and 174 kg or 1,95 %, respectively. The mass fraction of fat in German Holsteins of different generations ranged from 3,99 to 4,21 % (P < 0,001), while the mass fraction of protein in the milk of first-calf heifers varied slightly in the range from 3,18 to 3,20 %. In terms of live weight, the animals of the third generation slightly exceeded the herdmates of the 1st and 2nd generations by 19 kg or 3,25 % and 20 kg or 3,43 %, respectively. The largest profit has been received from the first-generation first-calf heifers of Holstein breed of German selection, where the level of profitability of milk production was 50,7 %, which was higher than that of the herdmates of the second and third generations by 3,9 and 7,9 %, respectively.

Influence of a complex feed additive on the morphological and biochemical parameters of the blood of first-calf heifers during the period of increasing the milk yield

2021 ◽  
pp. 31-39
Author(s):  
M. T. Sabitov ◽  
A. R. Farkhutdinova ◽  
M. G. Malikova ◽  
Yu. A. Karmatskikh
Keyword(s):  
Milk Yield ◽  
Biochemical Parameters ◽  
Blood Parameters ◽  
The Body ◽  
Feed Additive ◽  
Control Group ◽  
Black And White ◽  
White Breed ◽  
The Republic ◽  
Experimental Group

It is known that mineral additives play an important role in increasing the productivity and efficiency of the animal husbanry industry as a whole. The state of the body can be assessed by the content of mineral substances in a blood test. The purpose of the work was to study changes in morphological and biochemical blood parameters in first-calf heifers during the period of increasing the milk yield when they are fed a complex mineral and vitamin feed additive (CMVFA). The study of the influence of feeding the complex mineral and vitamin feed additive in the ration to first-calf heifers during the the period of increasing the milk yield on morphological and biochemical blood parameters has been carried out. The experiments were carried out in 2019–2020 in the OOO Breeding Farm “Valiev” in the Dyurtyulinsky district in the Republic of Bashkortostan on 3 groups of first-calf heifers of Black-and-White breed per 15 heads in each selected by the method of pairs of analogues. The animals of the control group received the main ration (MR) adopted on the farm, the 1st experimental group MR+120 g/head CMVFA according to the recipe No. 1, the 2nd experimental group MR+120 g/head CMVFA according to the recipe No. 2. In the ration of animals of the control group there was a deficiency of basic macro- and microelements. The use of CMVFA as part of the ration of first-calf heifers during the period of increasing the milk yield had a positive effect on the morphological and biochemical parameters of blood. Studies have shown that the use of CMVFA in the rations of first-calf heifers provided the need for minerals and vitamins, accelerating metabolic processes in the body during the most stressful period of lactation, the period of increasing the milk yield. According to the results of biochemical blood parameters, it is possible to esimate the improvement of protein, carbohydrate and mineral and vitamin nutrition in the first-cakf heifers of the experimental groups during the period of increasing the milk yield, which showed their genetic potential more fully and used nutrients more effectively for milk synthesis.

Performance profile of cows of ural type at different level of milk productivity

2020 ◽  
pp. 22-28
Author(s):  
O. Leshonok ◽  
V. Gridin
Keyword(s):  
Dairy Cattle ◽  
Milk Yield ◽  
The Body ◽  
Body Type ◽  
Milk Productivity ◽  
Black And White ◽  
Effi Ciency ◽  
Dairy Cattle Breeding ◽  
White Breed ◽  
And Performance

One of the tasks of selection and breeding work with dairy cattle is to assess the body type of cows in breeding herds. Body type plays an important role in the effi ciency of the use of animals in dairy cattle breeding only harmoniously developed cows when creating optimal conditions for housing and feeding, can show high milk productivity as well as they are less prone to the risks of premature culling for non-selective reasons. The selection of fi rst-calf heifers of Ural type of Black-and-White breed with milk productivity above 7000 kg of milk in breeding organizations of the Sverdlovsk region has been carried out. Materials on 2150 cows with average milk yield of 8622 kg of milk with the content of fat in milk of 3,90 % and protein – 3,20 % have been presented. With an increase in milk yield in fi rst-calf heifers there is a statistically signifi cant improvement in constitutional and performance features. Heifers have good parameters for the development of the body in height, which vary from 7,7 to 8,5 points, strong enough and deep body (fortress: 4,7–5,3 points; depth: 5,7–7,5 points), with well-defi ned milk forms (5,4–6,8 points). The udder of animals is characterized by a bath-shaped form (attachment density: 5,1–5,3 points; length of the front parts: 5,1–6,3 points) and an expressed escutcheon (width: 5,0–6,0 points; height: 7,8–8,3 points; central ligament: 4,9–5,3 points). For obtaining animals of dairy direction productivity with milk yield 7000 kg milk and more should make selection on the next parts of performance: rump high ≥ 7,0 points (from 145 centimeters); the depth of breast ≥ 6,0 points (not less 83 centimeters), length front share udder ≥ 5,0 points (from 21 centimeters), width rear share udder ≥ 5,0 points (not less 16 centimeters), express of dairy forms, central ligament ≥ 5,0 points.

THE DEVELOPMENT AND APPLICATION OF DAIRY COWS FEEDING STANDARDS BASED ON THE FACTORIAL METHOD

2016 ◽  
Vol 1 (1) ◽  
pp. 47-50
Author(s):  
Головин ◽  
Aleksandr Golovin
Keyword(s):  
Body Weight ◽  
Dairy Cows ◽  
Milk Production ◽  
Milk Fat ◽  
Live Weight ◽  
Nutrient Digestibility ◽  
The Body ◽  
Metabolic Energy ◽  
Regression Equations ◽  
Factorial Method

The aim of the study is to justify the improvement of dairy cows feeding standards with productivity 8000 kg of milk per year and live weight of 600 kg for the periods of lactation. In developing the standards it was used a new approach to determine the need for energy and nutrients through a combination of scientific and economic experiments with factorial method, which takes into account the physiological needs of the animals, to identify the relationship of the standards feeding with productivity. The scheme of the energy balance in the body of cows that when calculating the standards requirements of the metabolic energy can further take into account the factors of changes in body weight and activity. Developed regression equations and model calculation needs highly productive cows in the exchange of energy and essential nutrients using factorial method, which includes factors need to maintain life, milk production, pregnancy, gain (loss) in body weight and activity of the animals. The effect of feeding for improved standards on nutrient digestibility and utilization of nitrogen, calcium and phosphorus, as well as indicators of rumen metabolism and biochemical status of cows blood with a yield of 8,000 kg of milk per year in the period calved. As a result, feeding cows for improved rate of growth in milk production for 305 days of lactation was 6.0%, with a significant increase in yield of milk fat and protein, and the cost of feed per 1 kg of milk fat standard expressed in the exchange energy were lower than controls at 3.6% in obtaining additional revenue from the sale of dairy products.

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