Milk Production Technology Research Articles

Organization and feeding normalized growing repair heifers

The article reflects the initial state of research on the long-term maintenance heifers of Ukrainian black and white dairy cattle. Research aimed at obtaining a high-performance group of dairy cows regarding farmers' zonal characteristics of feed production technology and advanced economies of Western Europe. It should be noted that western milk production technologies have drawbacks that should be considered when implementing them in our farms. These technologies use the concentrated feeding of cattle intended for the repair group. Typically, these farms' cows eat bad food and poor voluminous use of pasture, which is an obstacle in the purchase of cows and calves, taking into account their high purchase price. The main advantages of Western technology feed an extra shredding of bulky feed to the length of stems 0.3–0.5 mm and use free access to the feed table on which the feed, which is composed of plush corn and feeds additional concentrates at milking time. Thus, the type of concentrate feeding cows has a positive, but at the same disadvantage, especially in feeding heifers repair. Cow barrenness is high (30 % or more), and the duration limits the effective use of cattle to three years. Top management of our technology can actively use cows for 5–6 or more years with barrenness no higher than 8 %. Thus, the theoretical issue of full feeding of young cattle intended for herds of repair, incredibly high performance, continues to be studied. Our research task was to examine the characteristics of the formation of future milk production of repair heifers depending on age, level of energy, and protein supply. It is a well-known fact that the early introduction of grain concentrates into the diet of month-old calves helps accelerate rumen development. This dry feed during this critical period of the calf's life will also ensure the regular and harmonious functioning of the gastrointestinal tract. Feeding whole grains, corn, and oats during this period will help strengthen the chewing muscles and improve the functioning of the salivary glands. Targeted breeding of repair heifers is one of the main tasks of animal breeders. The level of raising heifers in all age periods significantly impacts the health of animals, their subsequent milk productivity, reproductive capacity, and terms of productive use, and largely determines the efficiency of the dairy industry. Therefore, the organization and technology of rearing young animals for repair should be based on individual growth and development laws and contribute to the formation of animals with a strong constitution and high productivity. After all, it is known that the underdevelopment of organs due to insufficient feeding and inappropriate conditions of maintenance in one period of cultivation leaves negative consequences, even if the next period of animal development takes place under favorable organizational and technological conditions.

BIOENERGETIC ASSESSMENT OF MILK PRODUCTION AT COMMERCIAL DAIRY FARMS AND COMPLEXES OF DIFFERENT CAPACITIES

The article presents the results of bioenergetic analysis of milk production at commercial dairy farms and complexes of different capacities. The objects of the study were commercial dairy farms and complexes of State Enterprise “ZhodinoAgroPlemElita” of Smolevichi district, which have a complete cycle of milk production. Studies have shown that the implementation of milk production technology at the CDC “Berezovitsa” with a capacity of 850 heads requires less energy than at the CDF “Zhazhelka” with a capacity of 750 heads and the CDC “Rassoshnoye” with a capacity of 1000 heads.

The use of an energy feed additive in the rations of highly productive cows of Ayrshire breed

Under the conditions in the Vologda region the organization of complete feeding of cows in highly productive herds is especially difficult, since the range of harvested feed is reduced and their quality issues remain problematic. In the region many of the normalized nutrients in the rations of dairy cattle are limiting, which reduces the effi ciency of production of its products. The purpose of the work was to increase the effi ciency of milk production when using the energy additive Tirzana BSK in the rations of highly productive cows of Ayrshire breed. Studies on the eff ectiveness of the use of the energy additive Tirzana BSK were carried out in the winter-stall period of housing cows on the basis of the agricultural complex “Maysky Breeding Farm” in the Vologda region. A comprehensive research of the technology of milk production with the use of an energy additive in the rations of cows was carried out It was found that as a result of feeding the energy additive Tirzana BSK, there is an improvement in the digestibility of nutrients in rations, especially organic matter and fi ber. Higher digestibility coeffi cients in animals of experimental groups are obviously achieved due to the optimization of microbiological processes in the gastrointestinal tract due to the components of the additive, which includes propylene glycol, glycerin, polysaccharides and a complex of biologically active substances. Feeding Tirzana BSK additive has a positive eff ect on increasing milk productivity without reducing product quality. New data on the animal husbandry and economic feasibility of using the energy additive in feeding cows with a milk yield of over 8500 kg of milk per lactation have been obtained, which make it possible to identify additional reserves for increasing milk yields with rational expenditure of feed. The use of the energy additive Tirzana BSK in feeding highly productive cows of Ayrshire is economically justified, especially during periods of late dry period and the first 100 days of lactation.

Influence of feed sorbents on the productive and reproductive traits of cows of Black-and-White breed

In the composition of feed for cattle, the presence of toxins that are formed as a result of violations of the technology of harvesting and storage of feed is recorded. Aflatoxins, ochratoxins, zearalenone, T-2 toxin, DON (deoxynivalenol), fumonisin are isolated. Mycotoxins entering the blood have a rather negative effect on the body of cows, reducing their productivity and fertilizing ability. Under conditions of intensive milk production technology, the determination of toxins in feed when feeding highly productive cows is of particular importance. The purpose of the research was to establish the degree of influence of different dosages of feed sorbents on the productive and reproductive traits of cows. The research was carried out under the conditions of the breeding farm of Black-and-White breed in OOO “Barmino” in the Nizhny Novgorod region. The objects of research were cows of the first lactation of Black-and-White breed, and the subject of research was the dairy productivity of cows and their reproductive traits. The objectives of the research included a comparative study of the influence of feed additives “Provitol” and “Vetosporin-active” on the productivity and reproductive traits of cows. In the concentrate part of the feed, the excess of the permissible norm of the mycotoxins zearalenone by 2,5 times and ochratoxin by 4,2 times was revealed. It was found that the dairy productivity of cows and higher indicators of reproductive abilities were animals in the 4th experimental group, who have been received the largest amount of the feed sorbent “Vetosporin-active” 2 kg per ton of concentrated feed. In comparison with the analogues of other experimental groups, they have the best ease of calving, the absence of problems with the separation of the afterbirth and endometriosis, the optimal duration of the open days period and the minimum expenditures of sperm doses for effective insemination. It was recommended to use the feed sorbent “Vetosporin-active” at the dose of 2,0 kg per ton of feed as a feed additive in the main ration of highly productive cows to improve their reproductive and productive traits.

Influence of technological factors on milk quality indicators

The article presents a study of the organization of milk production technology on the farm with tethered and tethered-boxing of cows. It has been established that one of the departments uses Dairy Plan C21 herd management software. This makes it possible to obtain comprehensive data on milk productivity, health, and behavior of each cow, group of animals, and the herd. Pre- and post-milking treatment of cows' teats with means based on a probiotic culture of Bacillus subtilis, Forticept® Udder Wash, and Zooprotect. According to the research results, data on production and sales were obtained, and indicators of quality and safety of whole raw milk from two departments were analyzed. Gross milk production for the year at section 1 with free-range boxing of cows was 1875.4 tons, the average annual yield per cow – 7381 kg, milk marketability – 96.3 %. The production figures for section № 2 with tethered animals were – 1324.2 tons, 7333 kg, and 96.5 %, respectively. The study found that the average annual amount of MAFANM in milk from cows at tethered housing was 37 ± 3.6 × 104 thousand CFU/cm3; loose-box – 35 ± 4.1 × 104 thousand CFU/m3; the number of somatic cells is 327.8 ± 28.73 and 332.1 ± 29.91 thousand cm3, respectively. In the milk of cows from section № 2 the protein content was 3.19 ± 0.067 %, fat – 3.78 ± 0.106 %, fat/protein ratio – 1.18 : 1. Slightly higher values were obtained when studying cows' milk from the sections № 1 – 3.22 ± 0.033; 3.88 ± 0.093 %, and 1.21 : 1, respectively. According to normative indicators, the fat/protein ratio is 1.2–1.4 : 1. It should be noted that deviations from these indicators indicate a violation of metabolic processes in cows. Indicators of acidity and density in cow's milk were within the normative values. According to research, no heavy metals, pesticides, radionuclides, or inhibitors have been detected in whole raw milk. Therefore, analyzing the data obtained, it should be noted that the milk produced on the farm and sold to processing enterprises meets the requirements for quality milk. According to the national standard, it is suitable for producing quality and safe products.

Effect of Coconut Protein and Xanthan Gum, Soybean Polysaccharide and Gelatin Interactions in Oil-Water Interface.

We report on our study of the interactions between coconut protein extracted from coconut meat and three hydrocolloids (gelatin, xanthan gum, and soybean polysaccharide) and their interfacial adsorption and emulsification properties. We used Zeta potential, fluorescence spectroscopy scanning and ITC to investigate the interactions between a fixed concentration (1%) of coconut protein and varying concentrations of hydrocolloid. Through the interfacial tension and interfacial viscoelasticity, the interfacial properties of the hydrocolloid and coconut protein composite solution were explored. The physical stability of the corresponding emulsion is predicted through microstructure and stability analysis. Xanthan gum forms a flocculent complex with coconut protein under acidic conditions. Soy polysaccharides specifically bind to coconut protein. Under acidic conditions, this complex is stabilized through the steric hindrance of soy polysaccharides. Due to gelatin-coconut protein interactions, the isoelectric point of this complex changes. The interfacial tension results show that as time increases, the interfacial tensions of the three composite solutions decrease. The increase in the concentration of xanthan gum makes the interfacial tension decrease first and then increase. The addition of soybean polysaccharides reduces the interfacial tension of coconut protein. The addition of xanthan gum forms a stronger elastic interface film. Emulsion characterization showed that the gelatin-added system showed better stability. However, the addition of xanthan gum caused stratification quickly, and the addition of soybean polysaccharides also led to instability because the addition of polysaccharides led to a decrease in thermodynamic compatibility. This research lays the foundation for future research into coconut milk production technology.

Impact of Dairy Imports on Raw Milk Production Technology Progress in China.

China’s dairy product import volume and output continue to grow rapidly, and to a certain extent, it will form a substitute for the Chinese dairy market. Therefore, it is necessary to study the impact of the import of dairy products on the technological progress of raw milk production in China. Using the data from 2005 to 2017, this paper uses the DEA model and the input-output model to analyze the impact of China’s dairy product imports on the technological progress of raw milk production. The model results show that: (1) there are differences in the technological content of dairy products from different importing countries; (2) The total technological content of imported dairy products hinders the improvement of the technological progress index of small, medium and large-scale production of raw milk in China, and has the most prominent negative impact on the technological progress of large-scale raw milk production in China; (3) The technological content of dairy products imports from New Zealand, Australia, Germany, the Netherlands and other countries can help improve the technological progress index of China’s moderate-scale production of raw milk, while importing countries from the United States, Canada and other countries hinder it.

Production technology of livestock and poultry products using environmentally safe feed additives

Due to the growing demand for environmentally friendly products, the use of natural growth stimulants in animal husbandry has become especially relevant. Studies were conducted in accordance with generally accepted methods of zootechnical accounting, the average daily milk productivity of cows, safety, average daily and absolute growth of turkeys were determined. To assess the quality of milk, we used physicochemical and microbiological methods of investigation. The meat productivity of turkeys was evaluated by pre-slaughter weight, gutted carcass weight and slaughter yield. The use of activated zeolite in milk production technology made it possible to increase the milk productivity of cows and improve the quality characteristics of milk. The use of bentonite, poly enzyme preparation “Universal” and enzyme-mineral complex in poultry meat production contributed to an increase in the safety of turkeys, their growth rate and meat productivity.

Влияние роботизированного доения коров на эффективность производства молока

Abstract. Purpose is to study the effect of milk production technology in the SPK “Glinskiy” with the use of robotic milking machines Lely Astronaut, DeLaval and linear milking machine ADM-8A, on the efficiency of milk production. Methods. An analysis of the efficiency of milk production with various technologies of keeping and milking cows was carried out on the basis of materials for accounting for milk productivity obtained for 2016–2019, and also the marketability of milk, the cost per unit of milk and the profitability of milk production during robotic milking and milking in a milk pipeline were determined. Scientific novelty. The analysis of the economic efficiency of milk production in the conditions of one farm is carried out, the differences in the level of milk productivity and milk quality are determined. Calculated: the cost price of 1 kg of milk obtained using the milking machine ADM-8 and automated milking machines Lely and DeLaval, profitability. Results. A large number of factors, both genetic and paratypical, affect the milk production of cows. The main paratypical factor is milk production technology, which includes keeping, feeding and milking livestock. Nowadays, the widespread technology is tethering cows with milking in a long milk pipe in stalls, this technology is considered traditional. She is being replaced by a more productive one – keeping a milking herd without a tether in groups with milking on automatic milking machines (robotic milking). Feeding with these two technologies is organized according to different principles. Our study revealed the influence of milking technology on the efficiency of milk production. As a result of the study, differences in the level of milk productivity and milk quality were determined. Our study revealed a positive effect of milking technology with the help of robotic installations on the efficiency of milk production: milk yield for each lactation increases by 7–28 %, which is confirmed by the lactation constancy index, the content of somatic cells in milk decreases to 2.4 × 105 cells per 1 cm3 providing an increase in the marketability of milk to 97.4%, in terms of physical and chemical indicators, milk of cows, with different methods of keeping, was within the normal range and average values for the herd.

Intensive milk production technologies on a modern complex

The article presents the results of research confirming the influence of intensive technologies used in modern dairy complexes on the level of reproduction and productivity of milking herds. It is noted that when heifers are bred intensively in the specialized farm, at the first successful insemination the animals reach a high live weight (350-360 kg) at the age of 330-340 days. A high efficiency of intensive technology of dairy herd reproduction using sexed semen has been established. Thus, the pregnancy rate of heifers from the first insemination was 61.5% and that of cows of the first lactation, taking into account their health condition and the diseases they had undergone, was 41.1%. During calving, 82.9 - 94.3% of replacement heifers were obtained from the control stock of heifers and cows of the first lactation. Researches have shown that intensive technologies of the maintenance, feeding and reproduction herd realized on modern dairy complex provide high milk productivity of animals (the level of milk yield 10,240 kg of milk, mass fraction of fat in milk - 3.98% and that of protein - 3.17%). In the herd more than 3% of animals completed the sixth lactation (the level of milk yield - 9,940 kg of milk, the mass fraction of fat in milk - 4.35% and protein - 3.2%), which demonstrates the prospects of forming the dairy herd with a long period of economic use of cows. Consequently, intensive milk production technologies in modern complexes contribute to the increase of productivity of young cattle and milking cows, ensure high efficiency of reproduction of the dairy herd and, to a certain extent, increase the duration of productive use of animals.

Water-soluble vitamins in the feed of high-yield lactating cows during the milking period

The aim of the work is to show how to increase the productivity of cows, to improve the feeding system, to introduce intensive, promising, effective, resource-saving milk production technologies, including the implementation of measures for the production and use of domestic vitamin feed products (preparations). The studies were carried out by the example of highly productive dairy cows with an annual productivity of over 6000 kg of milk per lactation. The type of feeding is the silage – hayage silage concentrate, the rations are balanced in terms of nutrients, biologically active substances and metabolic energy. It corresponded to the generally accepted norms of animal feeding in the country (M., RAAS, 2003). The diets of cows during the milking period included Vitaminol and a phytocomplex (of 13 medicinal forage herbs), 10 g, 15 g and 20 g per head per day. When milking cows (100 days), fed with Vitaminol, more milk was produced ranging from 2.7 to 9.9 %, the phytocomplex increased milk yield from 8.4 to 16.3 %. The consumption of metabolic energy of diets per 1 kg of milk is lower in cows of the experimental groups when using different doses of Vitaminol ranging from 2.8 to 9.9 %, and the phytocomplex allowed ranging it from 8.3 to 16.1 % compared to the control variant. To increase metabolic processes in the body, productivity and supply of water-soluble vitamins and mineral macronutrients in cows under the conditions of a year-round stable method of keeping, the rations included the optimal dose of Vitaminol and the phytocomplex (separately) amounting to 20 g per head a day. Vitaminol serves to replenish the body of highly productive lactating cows during the period of milk production with missing biologically active substances, vitamin nutritional value of milk, increase the digestibility of organic substances in rations, and improve metabolic processes.

ESTIMATION OF THE RADIOLOGICAL EFFICIENCY OF ENTEROSORPTION COMPOSITE FORAGE ADDITIVE APPLICATION IN LACTATING COWS DIET

A prototype of composite enterosorption feed additive based on peat modified with iron hexacyanoferrate (ferrocin) has been developed. A scientific and economic experiment was carried out on lactating cows on the basis of the MTP "Dublin" of JSC "Malozhinsky" of Bragin district of Gomel region. For this, three groups of lactating cows were formed: two experimental and one control, five cows each. When setting up for the experiment, the animals were selected according to the principle of analogous pairs, taking into account live weight, calving age, stage of lactation, and average daily milk yield. The maintenance and care of the experimental animals corresponded to the milk production technology adopted at the livestock facility, as well as the organization of labor. The diets of the experimental animals were compiled according to detailed feeding rates and were calculated to receive 18–20 kg of milk from a cow per day. Milk sampling was carried out from each cow of the experimental and control groups on the 0th, 6th, 12th, 18th and 22nd days of the experiment in accordance with the sampling scheme during morning milking according to STB-1051-2012 "Selection samples of milk and dairy products. General requirements". The determination of the specific activity of 137Cs (Bq/kg) in the studied samples of feed and milk was carried out on a γ-spectrometric complex "Canberra-Packard" with an error of no more than 30 %. The radiological efficiency of composite ferrocin-containing feed additive based on peat in relation to 137Cs has been studied. For the first time, the multiplicity of decrease in 137Cs content in milk of cows was es tablished during the use of composite ferrocin-containing feed additive based on peat by a factor of 4.6 in relation to the control.

ЭФФЕКТИВНОСТЬ СКРЕЩИВАНИЯ БЕСТУЖЕВСКИХ КОРОВ С БЫКАМИ КРАСНОЙ ДАТСКОЙ ПОРОДЫ

The article presents results of studies on milk productivity of crossbred first-calf heifers obtained by crossing Bestuzhev cows with red Danish bulls. Feeding of both groups (control and experimental) was carried out with proper and balanced ration. Total nutritional value of the ration was 14.07 energetic feed units (EFU). One EFU accounted for 85.15 g of digestible protein, dry matter per 100 kg of live weight - 3.6 kg, fiber from dry matter - 23%. Sugar - protein ratio of the diet was at the level of 0.8. As a result, crossbred first-calf heifers had higher parameters of milk yield (by 20.57%), fat content (by 0.23%) and protein (by 0.07%) in milk compared to pure-bred Bestuzhev peers; they had also higher milking capacity index (by 14.14%). In addition, crossbred first-calf heifers show better development, their live weight is 26 kg or 5.64% higher than the level of the breed minimum requirements. Consequently, the effect of heterosis is noted when crossing Bestuzhev cows with red Danish bulls, which has a positive effect on better development of crossbred heifers and on increase of their milk productivity. As a result, crossbred first-calf heifers meet the modern requirements of milk production technology on an industrial basis better than their Bestuzhev peers. Therefore, this method of crossing with the red Danish breed is advisable and should be used in selection and breeding work with the Bestuzhev breed.

AYRSHIRE BREED IN THE CONDITIONS OF UKRAINE

AYRSHIRE BREED IN THE CONDITIONS OF UKRAINE

REPRODUCTIVE ABILITY OF FIRST-CALF COWS OF SIMMENTAL BREED IN ORGANIC AND CONVENTIONAL MILK PRODUCTION

The aim of the work was to study the influence of biological periods of reproduction of first-born cows of Simmental breed on their productive features of organic and conventional milk production.
 Research materials and methods. The research was carried out in the herds of Simmental breed PС "Halex-Agro" (organic milk production, n = 272) and LLC "Myroslavel-Agro" (conventional milk production, n = 120) Novograd-Volyn district of Zhytomyr region according to conventional methods.
 Research results. The article presents the results of research on the influence of the age of the first fertile insemination, age of first calving, the duration of service and dry periods of Simmental cows in their productive traits in organic and conventional milk production.
 The best indicators, regardless of the technology of milk production, were characterized by animals of the middle group, the age of the first fertile insemination of these animals in PE "Galex-Agro" ranged from 526 to 678 days, and in STOV "Miroslavel-Agro" – from 505 to 648 days. The value of this indicator within farms was 462.5 and 458.0 kg, respectively. Therefore, both early insemination and late insemination were not desirable for this herd, because with early insemination farmers don’t get enough milk and there is a high probability of giving birth to calves with lower live weight, while with late insemination there is an irrational overuse of investments in uncovered heifers. their future milk productivity.
 In the conditions of both farms there is a clear pattern that animals with an earlier age of the first fertile insemination are characterized by more intensive formation of live weight. Animals of the first and second experimental groups were statistically significantly superior to peers of the third experimental group in live weight at the age of 3 to 18 months in PE "Galex-Agro", and from 6 to 18 months in STOV "Myroslavel-Agro" (P < 0.05–0.01). There is almost the same live weight of heifers at different ages in both farms, due to the common origin of the breeding stock imported from the Czech Republic.
 It has been established that with increasing age of the first calving milk productivity of cows increases. The highest yield for 305 days (6117.2 and 5937.6 kg) and all lactation (6920.9 and 6953.4 kg) were observed in cows whose age of first calving was 995 and older and 917 and older days in the conditions of PE "Galeks-Agro” and STOV “Myroslavel-Agro” respectively. The lowest yield for 305 days (5733.9 and 5863.0 kg) and all lactation (6528.2 and 6424.6 kg) were in cows with the age of the first calving 835 and less and 778 and less days in both farms, respectively.
 There was a statistically significant effect (P < 0.01–0.001) of the duration of the service period in both farms on the duration of lactation of cows (58.6 and 63.9%), hopes (22.8 and 34.2%), as well as on the fat content in milk (2.2%) only in the conditions of PE "Galex-Agro". In the conditions of intensive management of the dairy industry in organic and conventional production, it is necessary to take into account the rate of reproduction of the herd, which is largely determined by the length of the service period. The service period is one of the key indicators that determines not only the reproduction of animals, but also their future milk productivity.
 Conclusions. According to the results of our own research, it was found that the extension of the service period leads to an increase in the duration of biological periods of reproduction and to a decrease in the coefficient of reproducibility (from 1.06 to 0.68; from 1.05 to 0.72), which is predictable. Statistically significant effect (P < 0.001) of the value of the service period was found in the conditions of PE "Galex-Agro" and LLC "Miroslavel-Agro" on the duration of the interbody period (74.2 and 68.8%), the coefficient of reproducibility and 78.2), as well as the duration of the dry period (2.6%) and the age of the first calving (2.7%) only in the conditions of PE "Galex-Agro".
 When comparing animals with a shortened and optimal duration of the dry period, a statistically significant difference was found in the conditions of organic production in the duration of lactation (25.3 days), milk yield during lactation (673 kg) and 305 days (359 kg), milk fat (13.7), milk protein (13.4 kg), total milk fat and protein production (26.2 kg). In terms of conventional production, animals with a shorter dry period are characterized by longer lactation and higher milk yield.

Influence of biopreparations on the postnatal period of highly productive cows

The article describes the results of comparative studies on the influence of new immunostimulants on the course of postnatal recovery of the cows under conditions of intensive milk production technology. Injections of PS-2 (group 1) and Prevention-N-E (group 2) at a dose of 10 ml forty, twenty and ten days before calving, and a injection of PDE at a dose of 20 ml with E-Selenium of 10 ml (group 3) twenty days before calving prevent the occurrence of obstetric and gynecological pathology, improve reproductive qualities, as compared to the control group, where no biologicals were injected. This fact impacts the acceleration of the first heat onset by 13.7-21.1 days, the conception rate by 0.5-0.7 times, the service period by 16-29.9 days. A positive effect of the tested agents on metabolic processes, morphological and biochemical blood parameters, nonspecific immunological reactivity of the organism was also established. All these factors led to an increase in milk productivity for 305 days of lactation by 186-478 kg, at the same time, milk quality indicators improved correspondingly. Thus, biological preparations PS-2 and Prevention-N-E are highly effective means of preventing obstetric and gynecological pathology.

Milk production process, quality and technological properties of milk for the use of various types of milking machines

Studies have been carried out to evaluate the efficiency of using easy-assembled cow houses in modern milk production technologies for the use of high-productive milking plants of the type ‘Parallel’ and ‘Carousel’ with 32 machines each. It has been established that new types of premises not only provide comfortable conditions for the maintenance of highly productive cows, but also reduce the labor costs for their maintenance and, most importantly, allow the use of modern high-productive milking installations of the type ‘Parallel’ and ‘Carousel’. It has been established that the technology of preparation of cows for milking and milking technology provides more complete display of the milk ejection reflex at the installation of the ‘Parallel’ type. The average intensity of cows’ milk flows at this plant is 30% higher compared to those of the installation of ‘Carousel’ type, which is confirmed by the intensity of milk flow production at the first minute of milking, which is at the level of 2.97 against 1.85 kg min.-1 per installation of ‘Carousel’ type. Milk obtained using a milking installation of the ‘Parallel’ type has higher values of the mass fraction of fat and protein that is associated with the genetic potential of animals. According to physical, chemical and technological properties, milk obtained from milking installations such as ‘Parallel’ and ‘Carousel’ is within the limits of the standards in force. Milk obtained from the use of milking equipment such as ‘Carousel’ has higher electrical conductivity at the level of 4.6 mS cm-3, which is confirmed by a higher level of mastitis disease of cows. Due to bacterial contamination, reductase test and milk clot characteristic, milk obtained using a milk installation of ‘Parallel’ type also has higher quality indicators than the installation of ‘Carousel’ type. But according to the complex of indicators, milk obtained from various technologies of milking refers to the desired cheese-making class.

Donkey Milk Production Technology and Efficient Farm Management in Georgia

Millions of people in today's world consume milk and dairy products, which are not only an important source of food for these people, but also a source of livelihood for farmers and processors. But to achieve this, consumers, dairy farms and processors need up-to-date the information on how the milk and dairy products can contribute to healthy human nutrition and how the dairy industry is evolving. Keywords: milk, food, farm management, economy.

Relationship between milk productivity and live weight of red-and-white cows in JSC “Krasny Mayak”

In the Krasnoyarsk Territory, a genetically young red-motley breed of cattle has become widespread, which requires further improvement of the breed structure, creating diversity, increasing variability for the effective use of breeding and productive qualities. In the breeding factories of the region, specializing in raising this breed, milk yield per cow has been 5.8-6 thousand kg in recent years. However, the period of economic use of cows does not exceed 2.9 lactations. In the conditions of industrial milk production technology, characterized by a high level of mechanization and automation of labor-intensive processes, only animals with strong body composition are able to realize their high genetic potential in terms of productive qualities while maintaining good reproductive abilities and increasing productive longevity. Therefore, studies on the development of a type of cows with body conformation and composition which are most productive and well-adapted to the conditions of breeding are of particular importance and relevance.

Effect of various milking equipment on milk ejection in high-yielding cows

Improving modern dairy farming is based on the industry's development, which means transforming livestock farming into a competitive industry. The development of its technical and technological support is closely related to its functional ability to realize the genetic potential of biological objects of production with high-quality products, which is the defining criterion for the competitiveness of machinery and technology at the industry’s present stage of development. The purpose of the research was to study milk production technology based on a comprehensive assessment and implementation of modern milking equipment, maximizing animals’ genetic potential and industry efficiency. We proved that applying the ‘DeLaval’ milking parlor under the same feeding and keeping animals ensured the proper completeness of milking and increased cows’ milk yield. During the first, third, and highest lactations, the milk yield was 226 kg (P=0.05), 266 kg (P=0.05), and 214 kg (P=0.05), respectively. After-milking when applying ADM-8A averaged 175 ml, and only 45 ml when applying the ‘DeLaval’ parlor. When using the ‘DeLaval’ milking equipment, the milk production intensity of cows was 1.43 kg/min, and, with ADM-8A, it was 1.24 kg/min, which is 0.19 kg/min (P=0.001), or 15.3% higher.