Milk productivity of the cows of Holstein and Simmental breeds in environment of the Novosibirsk region

2020 ◽  
pp. 41-49 ◽  
Author(s):  
A. Zheltikov ◽  
N. Kostomakhin ◽  
D. Adushinov ◽  
O. Zaiko ◽  
V. Dementev ◽  
...  
Keyword(s):  
Protein Content ◽  
Milk Yield ◽  
Milk Fat ◽  
Correlation Coefficients ◽  
Live Weight ◽  
Fat Content ◽  
Milk Productivity ◽  
Holstein Breed ◽  
Novosibirsk Region ◽  
Daily Milk Yield

The characteristic of milk productivity of cows of Holstein and Simmental breeds in LLC “Sibirskaya Niva” in the Maslyaninsky district in the Novosibirsk region has been given. It has been revealed that under the natural and climatic environments of the Western Siberia, when creating favorable conditions for feeding and housing for cows of Holstein and Simmental breeds have sufficiently high milk productivity. It has been found that Holstein first-calf heifers surpassed their Simmental herdmates by 959 kg in milk yield for the first 305 days of lactation under the same conditions of housing and feeding, by 3,1 kg in daily milk yield, by 38,2 kg in milk fat yield, and by 28,3 kg in milk protein yield (P < 0,001). There were no statistically significant differences between animals of Holstein and Simmental breeds in terms of fat and protein content in milk, which amounted to 3,94 and 2,96 % in Holstein breed and 3,97 and 2,98 % in Simmental breed, respectively. Both breeds have shown high milk productivity during the first 3 lactations. Thus, the milk yield of Holstein cows for the first 3 lactation was 6475–9290 kg, Simmental cows it was 5516–7680 kg, fat content was 3,93–3,99 and 3,96–3,97 %, respectively. The protein content in the milk of cows of both breeds did not exceed 3,0 %. High variability has been found in milk yield, yield of milk fat and protein, the coefficient of milk content and duration of lactation, the lowest in the content of protein and fat in milk and live weight. The correlation coefficients between the fat and protein content in milk were generally positive, but did not exceed 0,28. Therefore, breeding in the herd of cows in LLC “Sibirskaya Niva” have to be conducted not only by fat content, but also by protein content in milk.

scholarly journals PRODUCTIVE QUALITIES OF COWS OF DIFFERENT BREEDING GROUPS OF THE BUKOVINSKY FACTORY OF THE UKRAINIAN RED-AND-WHITE DAIRY BREED

2020 ◽  
Vol 59 ◽  
pp. 60-66
Author(s):  
O. I. Liubynskyi ◽  
R. V. Kasprov
Keyword(s):  
Protein Content ◽  
Milk Yield ◽  
Milk Fat ◽  
Correlation Coefficients ◽  
Live Weight ◽  
Fat Content ◽  
Positive Correlation ◽  
Breeding Group ◽  
The Difference ◽  
Dairy Breed

The studies were conducted on the materials of the breeding record of the breeding plant of JSC "Mirne" of Chernivtsi region - the basic farm of the Bukovyna factory type of the Ukrainian red-speckled dairy breed. 360 cows were selected for analysis, based on live weight, yields, fat and protein content of milk, total milk fat and protein content. The intensification of dairy cattle breeding necessitates the systematic evaluation of animals in herds and populations on the basis of economically useful traits. Analysis of the productive qualities of the cows of the different breeding groups showed that, by live weight, milk yield, milk fat and protein content, the two-breed (II breeding group) animals were better than the three-breed (I breeding group). The difference for the first lactation was 11.2; 32.9; 1.5; 1.0 kg respectively. In cows with the second lactation, the pattern remained, the difference was 22.2; 395.8; 15.8; 13.1 kg respectively, and for the third lactation – 31.4; 124.3; 4.8; 4.2 kg. The fat and protein content of milk varied between 3.88–3.89% and 3.33–3.34%, respectively. It should be noted that in cows of both groups there was a decrease in milk milk yield with increasing number of lactations.An evaluation of the productive qualities of the first-born cows of the different lines showed that Marshall's first-borns were better in live weight, milk yield, milk fat and protein, although they were inferior to other lines in terms of fat and protein content. In the firstborn of the Hanover Red line, the estimated values were lower than in animals of other lines, in particular – by live weight by 11.4 kg, milk yield by 1115.2 kg, milk fat by 44.1 kg, milk protein by 37.2 kg (Chif line), by 5.4; 1336.5; 52.7; 45.2 kg (Starbuck line) and 14.7; 1465; 55.1; 48.3 kg (Marshall Line).The effectiveness of breeding for increasing dairy productivity of cows depends on the efficiency of selection and selection of animals, taking into account the phenotypic and genetic correlation between economically beneficial traits. It was found that the highest positive values of correlation coefficients were observed in the cows of the studied groups between milk yield and protein content in the context of all lactations – 1st breeding group (r = 0,12–0,25), 2 nd breeding group (r = 0.19–0.3). In the cows of the first breeding group for the first and second lactations revealed not high but positive correlation of milk yield with live weight (r = 0.33–0.49). In the cows of the second breeding group for the first and second lactation positive correlation with milk fat content was found.The first positive cows of different lines showed the highest positive values of the correlation coefficients between milking and protein content (r = 0.19–0.43). There was also a low positive correlation of milk yield with live weight in the firstborn of all evaluated lines (r = 0.03–0.09), as well as milk fat content in cows of Starbuck and Marshall lines.Conclusions. 1. By live weight, milk yield, milk fat and protein content, two-bovine cows of the Bukovyna factory type of Ukrainian red-speckled dairy breed were better than three-born. The fat and protein content of milk varied between 3.88–3.89% and 3.33–3.34%, respectively. In cows of both groups there was a decrease in milk yield with increasing number of lactations.2. By live weight, milk yield, milk fat and protein content, Marshall Line firsts were better, although they were inferior to other lines in terms of fat and protein content. In the firstborn of the Hanover Red line, the estimates were lower than in other line animals.3. The highest positive values of correlation coefficients were observed between milk yield and protein content in the context of all lactations in the cows of Bukovyna factory type of Ukrainian red-rippled dairy breed. In two breeds of cows for the first and second lactation revealed not high but positive correlation of milk yield with live weight, and in three breeds for the first and second lactation positive correlation of milk yield with fat content.

scholarly journals USEFUL FEATURES OF DAIRY COWS AND THEIR CONNECTION WITH PRODUCTIVE LONGEVITY

2018 ◽  
Vol 56 ◽  
pp. 50-64 ◽  
Author(s):  
N. P. Mazur ◽  
Ye. I. Fedorovych ◽  
V. V. Fedorovych
Keyword(s):  
Dairy Cows ◽  
Milk Yield ◽  
Milk Fat ◽  
Correlation Coefficients ◽  
Live Weight ◽  
Milk Productivity ◽  
Black And White ◽  
Holstein Breed ◽  
Economic Use ◽  
Selection Of

A fundamental genetic improvement of domestic dairy breeds is carried out by using the gene pool of the best foreign breeds, in particular Holstein. This approach has greatly improved the milk productivity of cows, but has led to a significant deterioration in reproduction, longevity, product quality, general animal health etc. Taking into account that the increase of the milk productivity of cows leads to a shortening of their use, this problem will only become aggravated over time. Therefore, it is now necessary to direct scientific research into a comprehensive assessment of animals taking into account the signs of lifelong productivity. In view of the above, the purpose of our research was to study the economic utility signs of dairy cows and their relationship with productive longevity. The research was conducted on cows of Holstein (n = 2902), Ukrainian Black- (n = 14876) and Red-and-White (n = 2176) dairy breeds. To characterize the economic useful signs of animals of the studied breeds based on the materials of the primary zootechnical and breeding records, weighed growth of animals, reproductive capacity, milk productivity and duration and efficiency of lifetime use were studied. It was established that heifers of investigated dairy breeds were characterized by a moderate intensity of growth of live weight, as evidenced by average daily increments from birth to 18 months of age: in animals of Holstein breed – 644, Ukrainian Black-and-White milk breed – 641 and Ukrainian Red-and-White dairy breed 692 g. The first fruitful insemination of heifers of the Holstein breed occurred on average at the age of 19.1, Ukrainian Black and Red-and-White dairy breeds - 20.4 and 20.8 months, while their live weight at that was 405.3; 414.3 and 438.5 kg respectively. The milk yield of the Holstein breed cows, depending on the lactation, was 4846–7920 kg, the fat content in milk was 3.63–3.74% and the amount of milk fat was 181.2–279.7 kg, the Ukrainian Black-and-White milk breed was 4008–6317 kg, 3.63–3.70% and 148.6–228.8 kg respectively, while Ukrainian Red-and-White milk is 4578–6592 kg, 3.74–3.87% and 177.2–245.9 kg. The cows of the given breeds were used in herds only 2.32–2.50 lactation. The highest life milk yield was noted in animals of the Holstein breed (18,669 kg), and the lowest (14,940 kg) in the cows of the Ukrainian Red-and-White breed. Correlation analysis of economic characteristics of dairy cows with indicators of their productive longevity confirms the possibility of conducting an indirect predictive selection of animals in order to form high-yielding herds with long-term economic use. Among the studied features, the greatest predictive value (P < 0.001) for the indicators of life expectancy, productive use, lactation, the number of lactation per life, life yield and lifetime of milk fat have yield of cows for the first (r = -0.217 – +0.205) and the best lactation (r = +0.061 – +0.609). An intermediary predictive selection of animals can also be carried out according to the duration of their first service period (r = -0.462 – +0.106) and live weight during growing season (r = -0.286 – +0.126). It was established that live weight at the first insemination and the first calving significantly influenced the indicators of life yields, economic use and lactation of animals, as evidenced mainly by higher and reliable values of correlation coefficients between these indices. It should also be noted that the correlation coefficients between the live weight of cows in the first calving and the duration of life, productive use, lactation and the number of lactations in life were somewhat higher but negative values (r = -0,130 – -0,070), compared with the between live weight at the time of first insemination and the above indicators of longevity of animals (r = -0,037 – +0,094). This suggests that the effect of live weight on the first calving of animals on their longevity was somewhat higher than the effect of live weight at the first insemination. Our data show that the selection of cows by the age of the first calving and the duration of the first lactation is not significant, since there is practically no link between these features and the indicators of productive longevity.

scholarly journals GENETIC AND POPULATION PARAMETERS OF UKRAINIAN RED DAIRY COWS DEPENDING ON CONDITIONAL BREEDING BY HOLSTINA BREED

2020 ◽  
Vol 60 ◽  
pp. 40-46
Author(s):  
T. P. Koval
Keyword(s):  
Milk Yield ◽  
Milk Fat ◽  
Correlation Coefficients ◽  
Fat Content ◽  
Milk Productivity ◽  
Recurrence Rates ◽  
Clear Trend ◽  
Blood Content ◽  
Holstein Breed ◽  
Age Related

A significant level of intergroup differentiation and specificity of cows with different proportions of conditional blood by Holstein breed on the basis of milk productivity was revealed. There is a tendency of some increase in milk yield of cows with an increase in their conditional blood content by Holstein breed over 50% and above and a decrease in milk fat content by 0.16%. Our research has established quite significant recurrence rates for the considered signs of milk productivity at the highest degrees of probability, which indicates the possibility of effective selection of cows on the basis of milk productivity for the first lactation. Age-related recurrence of signs of milking between the first and higher lactation is higher than the same in terms of fat content in milk. At the same time, there is a clear trend of a gradual increase in the coefficients of recurrence of both quantitative and qualitative composition of the milk of cows of the herd with an increase in their conditional blood content by Holstein breed. The only exceptions are low-blooded animals (up to 50%). One-factor analysis of variance revealed a very insignificant and unreliable effect of heredity by Holstein breed on the hopes of cows for both the first and higher lactation. The influence of conditional blood by Holstein breed on the variability of fat content in milk is slightly higher (11–15%) at the highest levels of reliability. Correlation analysis of signs of milk yield and fat content in milk for both the first and higher lactation revealed mostly low values of correlation coefficients with a predominantly low degree of reliability. There was some increase in the correlation and change of its direction from negative to positive in high-blooded Holstein animals. Significant variability of coefficients of phenotypic consolidation of cows of different conditional bloodlines by Holstein breed on the main signs of milk productivity is noted. There is a tendency to reduce the coefficients of phenotypic consolidation of signs of milk productivity, in addition to the fat content in milk, with an increase in conditional blood in Holstein breed to 75% and above and in low-blooded animals (up to 50%).

scholarly journals PHENOTYPE FEATURES APPEARANCE OF DAIRY PRODUCTIVITY OF DIFFERENT UKRAINIAN DAIRY BLACK-AND-WHITE BREED COWS GENOTYPES

2019 ◽  
Vol 58 ◽  
pp. 33-40 ◽  
Author(s):  
A. R. Pendyuk ◽  
V. V. Fedorovych ◽  
N. P. Mazur
Keyword(s):  
Dairy Cattle ◽  
Milk Yield ◽  
Milk Fat ◽  
Correlation Coefficients ◽  
Fat Content ◽  
Milk Productivity ◽  
Black And White ◽  
Holstein Breed ◽  
Dairy Breed ◽  
A Share

The main task of breeding in dairy cattle breeding is to raise dairy productivity of cows. Improvement of productive qualities of domestic dairy cattle with the use of Holstein breeders of high breeding value led to serious disadvantages, including impairment of animal health, reproductive capacity and quality of milk. Therefore, the purpose of our research was to examine the milk productivity of cows of different genotypes of the Ukrainian Black-and-White dairy breed and ascertain the relationship between quantitative and qualitative indicators of milk. Research conducted at agricultural limited liability company "Lishche" Lutsk district of Volyn region on cows of different genotypes of the Ukrainian Black-and-White dairy breed. 5 groups of animals were formed: I − cows with a proportion of Holstein breed 75% or less, II − with a share Holstein heredity 75.1–81.25%, III − Holstein heredity share 81.26–87.50%, ІV − with a share of the heredity of the Holstein 87.51–93.75% and V − with a share of the heredity of the Holstein more than 93.75%. Evaluation of milk productivity was carried out by milk yield, fat content in milk and the amount of milk fat for the first, second, third and highest lactations according to the data of zootechnical accounting. It was found that the largest number of animals under control (33.7%) was with the relative share of Holstein heredity of 81.26–87.50%, and the lowest (9.3%) was with relative share of the Holstein breed's heredity more than 93.75%. Analysis of the level of milk yield of cows of different genotypes showed that the increase of Holstein heredity increases milk yields, however, significantly reduces the fat content of milk. If the animals have a share of Holstein heredity up to 75% the milk yields was 5154, and the amount of milk fat − 199.7 kg, and cows with hereditary of 75.10–81.25% showed figures increased by 16.4 and 15.5%, with Holstein heredity 81.26–87.50% by 23.3 and 20.8%, Holstein heredity 87.51–93.75% for 26.1 and 23.2% and with Holstein heredity more than 93.75% for 34.8 and 31.4%, and fat content in milk, on the contrary, decreased, depending on the genotype of animals, by 1.6–2.3%. In all in the above cases, these changes were highly significant (P < 0.001). The effectiveness of breeding on increasing the milk productivity of cows depends on the efficiency of selection and selection of animals, taking into account the phenotypic and genetic correlation between economically useful features. It was found that the studied cows of all genotypes had highest highly reliable (P < 0.001) positive values of correlation coefficients between milk yield and milk fat (Table 2). These features are the most predicted because strong relationship between them (r = 0.912–0.987). There was also observed direct positive ligament (r = 0.039–0.533, P < 0.05–0.001) between fat content in milk and milk fat content, and mostly weak, and only in some cases correlation coefficients had average values. The cows of the studied genotypes had the lowest and for the most part unreliable values of relative variability by the milk yields and fat content milk. The heifers with conditional share of Holstein heredity, more than 75% had negative and weak relationship features, and the older cows were diversified from weak to average values. One of the reliable criteria for determining the level of heredity of features is the coefficient of frequency, which indicates their heredity stability in age. Coefficients of age-related frequency of milk yield, fat content of milk and the highest milk fat content of cows with a conditional share of Holstein heredity of up to 75% had indicating a higher degree of heredity of these features compared to high half-bred cows. With the increasing of heredity of the Holstein breed the genotype of controlled animals values were decreasing for the most part. The most significant and reliable (P < 0.001) genotype of animals affected milk yields (13.3–18.1% of the total variability of this feature), less – the fat content of milk (9.3–13.2% (P < 0.001) and the amount of milk fat (6.6–14.1% (P < 0.001), with the highest genotype influence on the studied features indicated in the first lactation.

scholarly journals Characteristics of the productive-economic indicators of cows of Yaroslavl breed of different genotypes

2020 ◽  
pp. 43-52
Author(s):  
N. Kosyachenko ◽  
Marina Abramova ◽  
M. Lapina
Keyword(s):  
Protein Content ◽  
Milk Production ◽  
Milk Yield ◽  
Milk Fat ◽  
Live Weight ◽  
Practical Significance ◽  
Holstein Breed ◽  
Blood Fraction ◽  
The Impact ◽  
The Relationship

Abstract. Aim. The study of the influence of crossbriding on the growth and development of heifers and subsequent productive and reproductive qualities of cows on the first lactation. Methods. Using statistical methods, correlation analysis and ANOVA for evaluated genetic indicators of economic-valuable traits of dairy cattle. In particular was studied live weight of heifers from birth to 18 months, first insemination age and first fecundation age, live weight at fecundation, frequency of insemination, first calving age, days open, live weight at first lactation, milk yield for 305 days (kg), fat (%, kg) and protein (%, kg) in milk. Results. Relationship between productive indicators and the genotype of the animal is established. When assessing the strength of the influence of the factor «blood on the Holstein breed» it was found that the greatest impact can be traced at the age of 6 and 18 months, and is respectively 12.7 % and 17.1 %.The reproductive qualities of the first-calf cows decreased with the increase percent of blood in the Holstein breed. Evaluation of the impact of crossbreeding on milk production at first lactation has revealed significant strong influence on milk yield for 305 days of first lactation, and related signs the amount of milk fat and protein. According to qualitative indicators, the low influence of the Holstein blood fraction was found, while to a greater extent on the fat content than on the protein content in milk. Evaluation of phenotypic and genotypic correlations of milk yield and quality components of milk revealed average negative phenotypic and low negative genotypic correlation in all groups. The exception was in heifers of Yaroslavl breed with percent of Holstein blood less than 50 %, in which the relationship of yield x protein was positive. The relationship between milk yield and fat and protein content in milk has the opposite moderate character and strength. Practical significance. Studies was established that breeding of animals of Holstein and Yaroslavl breeds in one herd allows to receive an optimum ratio of milk production with optimal percentage fat and protein. For this herd among animals of the improved genotypes of the Yaroslavl breed, the use of genotypes with a percent of blood in the Holstein breed from 75.1 % to 87.6 % is optimal, which should be taken into account when selecting bulls to the breeding program.

scholarly journals Productivity of fi rst-calf cows of different sire lines

2019 ◽  
Vol 49 (4) ◽  
pp. 58-64
Author(s):  
A. G. Kolchev
Keyword(s):  
Protein Content ◽  
Milk Yield ◽  
Lactation Period ◽  
Milk Productivity ◽  
Black And White ◽  
Holstein Breed ◽  
White Breed ◽  
High Level ◽  
Daily Milk Yield ◽  
Daily Milk

The results of the study of milk productivity and lactation rates of fi rst-calf cows are presented. The research into fi rst-calf cows of black-andwhite Holstein breed, belonging to sire lines of Wis Ideal 1013415 and Refl ection Sovereign 198998 was conducted in 2018 in Novosibirsk region. The number of cows under study was 64, the period of the study covered 305 days of lactation. Monitoring of milk production, milk fl ow intensity, fat and protein content was carried out monthly. The research materials were analyzed for groups of cows depending on their sire line and productivity for single and daily milk yield, fat and protein content, and dynamics of milk ejection for the fi rst 3 minutes of milking. The highest daily milk yield in both lines was observed in the second month of lactation. In the fourth and fi fth months of lactation, the average daily milk yield of Refl ection Sovereign cows was signifi cantly higher (р < 0.001) than that of their peers of the Vis Ideal line, by 1.3 kg. During the lactation period, the productivity of the Vis Ideal and Refl ection Sovereign cows was almost the same: milk yield – 8296 and 8220 kg, fat content – 4.02 and 4.06%, protein – 3.36 and 3.35% and milk fl ow intensity – 2.70 and 2.78 kg/min, respectively. In the second and third months of lactation, cows of both lines had a decrease in the content of fat, protein and intensity of milk fl ow with a gradual increase in these indices in the fourth and fi fth months of lactation. First-calf cows of the black-and-white breed of Canadian selection of different sire lines showed a high level of milk productivity and proved to be suitable for further breeding work.

scholarly journals ESTIMATION OF SIMMENTAL COWS FOR MACHINE MILKING SUITABILITY

2021 ◽  
Vol 212 ◽  
pp. 137-142
Author(s):  
E.I. Anisimova ◽  
◽  
P.S. Katmakov ◽  
A.V. Bushov ◽  
◽  
...  
Keyword(s):  
Protein Content ◽  
Milk Yield ◽  
Agricultural Production ◽  
Milk Fat ◽  
Milk Composition ◽  
Fat Content ◽  
Agricultural Cooperative ◽  
Machine Milking ◽  
Milk Flow ◽  
Daily Milk Yield

The paper presents results of studies on evaluating Simmental cows for machine milking suitability. It was found that 78.7% of cows had a bowl-shaped udder, round - 14.7% and goat - 6.6% of cows at ‘agricultural production cooperative “COMBINE”. Bowl-shaped cows are more productive. Their milk yield was 4724 kg for 305 days of lactation with a fat content of 3.97% and a protein content of 3.30%. Their udder index was 47.7%. As for cows with a rounded udder shape, milk yield per lactation was 4246 kg with fat and protein content of 4.08 and 3.26% , respectively, and an udder index of 46.1%. Cows with a goat udder shape were characterized by low milk yield (3181 kg) and the worst parametres of milk fat content (3.88%), milk protein (3.20%) and udder index (2.2%). Approximately the same pattern is observed in the herd of the agricultural cooperative “Abodimovskiy” with slightly worse parametres of cow productivity. The intensity of milk production of cows of agricultural production cooperative “Abodimovsiy” with a bowl-shaped udder was 1.42, round - 1.35 and goat - 1.18 kg / min. Cows with a rounded udder shape had higher milk flow rate, which was equal to 1.65 kg / min, with a bowl-shaped one - 1.24 and with a goat udder shape- 1.09 kg / min in agricultural production cooperative “Combine”. No relation was found between udder index and milk composition. There is also no conjugation between the intensity of milk flow and fat and protein content for udder quarters and for the udder as a whole, whereas a positive correlation was found between the intensity of milk flow and daily milk yield.

ПРОДУКТИВНОСТЬ КОРОВ ХОЛМОГОРСКОЙ ПОРОДЫ С РАЗЛИЧНОЙ СТЕПЕНЬЮ ГОЛШТИНИЗАЦИИ В УСЛОВИЯХ РЕСПУБЛИКИ КОМИ

2020 ◽  
Author(s):  
S.V. NIKOLAEV ◽  
N.A. SHEMURANOVA
Keyword(s):  
Milk Production ◽  
Milk Yield ◽  
Milk Fat ◽  
Komi Republic ◽  
Fat Content ◽  
Milk Productivity ◽  
Blood Content ◽  
Holstein Breed ◽  
The Third ◽  
Economic Use

Представлены данные о продуктивности коров холмогорской породы и их помесей с различной степенью голштинизации. В период с 2000 по 2019 год установлено, что в условиях Республики Коми коровы с долей кровности более 75 по голштинской породе превосходят чистопородный холмогорский скот по показателям молочной продуктивности и жира в молоке за 1-ю лактацию на 40,3 и 0,63 абс., а в 3-ю на 52,8 и 0,64 абс., соответственно. Однако повышение молочности за лактацию не приводит к увеличению пожизненного производства молока, что обусловлено снижением продолжительности хозяйственного использования. У коров с долей кровности по голштинам более 75 средний возраст выбытия составляет 2,400,11 отела, что в 1,5 раза меньше по сравнению с чистопородными животными.Наибольший пожизненный удой имеют животные с кровностью 50, полученные при скрещивании чистопородного голштинского и холмогорского скота (19850618 кг), а наименьший с кровностью 2550 при разведении помесей в себе (123281134 кг). Продукция молочного жира за все лактации у коров с кровностью 50 составляет 799,625,3 кг, что в 1,9 раз больше аналогичного показателя животных с долей кровности до 25. При учете молочной продуктивности на 1 день жизни животного установлено, что наибольший показатель наблюдается у коров с кровностью 50 7,4 кг молока натуральной жирности, а при пересчете на базисную жирность (3,4) у высококровных (более 75) по голштинской породе помесей (9,00,3 кг), где также наблюдается наибольший показатель производства молочного жира на 1 день жизни 307,310,1 г.The article presents data on the productivity of cows of the Kholmogorskaya breed and their crosses with varying degrees of holsteinische. In the course of studies conducted in the period from 2000 to 2019, it was found that in the Komi Republic, cows with a blood content of more than 75 of the Holstein breed outperform pure-bred Kholmogorsky cattle in terms of milk productivity and fat in milk for the first lactation by 40.3 and 0.63, and in the third by 52.8 and 0.64 respectively. However, an increase in milk yield per lactation does not lead to an increase in lifetime milk production, which is due to a decrease in the duration of economic use: in cows with a Holstein blood ratio of more than 75, the average leaving age is 2.400.11 calving, which is 1.5 times less than in purebred animals. The highest lifetime yield is given to animals with a blood content of 50 obtained by crossing Chi-pedigree Holstein and Kholmogorsky cattle (19850618 kg), and the lowest with a blood content of 2550 when breeding crossbreeds in themselves (123281134 kg). The production of milk fat during all lactation in cows with a blood content of 50 is 799.625.3 kg, which is 1.9 times more than in animals with a blood content of up to 25. When accounting for milk production on a day in the life of an animal is established that the highest milk yield observed in cows with percentage of the blood 50 and 7.4 kg of milk, natural fat content, and at recalculation on basic fat content (3.4) from 75 of the Holstein breed hybrids (9.00.3 kg), which also has the highest production of milk fat on day 1 of life 307.310.1 grams

THE BLACK-AND-WHITE CATTLE BREEDING RESULTS WHEN USING THE POTENTIAL OF HOLSTEIN BREED

2020 ◽  
Vol 5 (86) ◽  
pp. 107-114
Author(s):  
А.I. Shendakov ◽  
◽  
◽  
Keyword(s):  
Protein Content ◽  
Milk Yield ◽  
Milk Fat ◽  
Fat Content ◽  
Mothers And Daughters ◽  
Black And White ◽  
Holstein Breed ◽  
Long Period ◽  
Productive Traits ◽  
Positive Correlations

The share of genes of Holstein breed was 76.8% in the herd. It was found that during the research period, the normal distributions of milk productivity traits were observed in the herd. The number of cows in the herd decreased, but their breeding qualities increased. The main reason for which animals were culled from the herd was their gynecological diseases (in some years, up to 175 to 188 heads were culled). The protein content in milk varied from 2.90 to 3.39%. Most cows produced milk in which the protein content was at a level of 3.00 to 3.19%. The herd showed positive correlations between the yields of mothers and daughters for the 305-day-long period: 0.234 for the whole herd, 0.517 for the group of cows with 50% of Holstein breed (HF) genes, 0.098 for the group with 51-75% of HF genes, and 0,189 for the group with minimum 76% of HF genes. For the herd, the heritability coefficient for milk yield for the 305- day-long period (h2) was 0.468. The percent of the protein content in milk produced by cows with 50% of Holstein genes had a high heritability coefficient of 0.668. Only cows of the M. Chieftain line showed positive correlations between the fat content in milk produced by mothers and daughters, and positive correlations between the protein content in milk produced by cows of the W. B. Ideal and M. Chieftain lines was found. With an increase in percent of Holstein breed genes (HF) from 25 to 75% and more, there were no significant differences in milk yield among first-calf cows (they amounted to 5,424 ± 83 – 5,520 ± 116 kg of milk). The percentage of fat and protein in milk for the whole herd was positively interconnected (r = + 0.460). On average, daughters exceeded their mothers by 23.3% in terms of milk yield and by 2.0% in terms of the percentage of fat content in milk (of the trait value). The quantity of milk fat and protein increased by 25.8 and 22.5%, respectively. Based on the research results, it has been concluded that the Holstein breed has a positive effect on the productive traits of dairy cattle, but technology optimization is required to continue selection activities.

scholarly journals Evaluation of highly productive cows by selection and genetic parameters

2020 ◽  
Vol 22 (93) ◽  
pp. 22-28
Author(s):  
T. V. Pidpala ◽  
Yu. S. Matashnyuk
Keyword(s):  
Protein Content ◽  
Milk Yield ◽  
Negative Correlation ◽  
Milk Fat ◽  
Genetic Parameters ◽  
Fat Content ◽  
Holstein Cows ◽  
Milk Productivity ◽  
Medium Level ◽  
High Level

Under the conditions of intensive technologies used in production of livestock products, the main selection feature that characterizes the economic feasibility of dairy farming and breeding value of animals is milk productivity. One of the factors that affects, not only the economy of production, but also the improvement of herds and breeds of cattle, is the use of highly productive cows. Therefore, the aim of our research was to assess the level of development of productive traits in Holstein cows under the conditions of intensive milk production technology, according to selection and genetic parameters. To conduct the study, a group of 1089 first-born cows was formed with the help of the Dairy Comp program and Microsoft Excel. The material for the research was the milk productivity of Holstein cows during the first three lactations. The level of development of selection traits in animals was determined by selection and genetic parameters. It was found that from the sample n = 1089 to the group of highly productive animals (“>10560”) were included 266 cows, and low-productive animals (“<8706”) – 249 first-borns. They had an average milk yield for the first lactation, 11439 kg of milk with a fat content of 3.96 % and 7737 kg of milk and 3.95 %, respectively. There is a difference in milk yield, milk fat and protein between the groups of cows “>10614” and “<8706”, but there is a general tendency towards changes in productivity with age. Based on the data of milk recurrence and the amount of milk fat of high-yielding cows (group “>10614”), it was found that higher values of the coefficient are characteristic of lactations I–III (rw= 0.105; rw= 0.135). As a result of comparative analysis it was found that low-yielding animals (group “<8706”) were characterized by higher recurrence rates for I–II and I–III lactation (rw = 0.345;rw = 0.316;rw = 0.320 and rw = 0.664;rw = 0.646;rw = 0.651, respectively). Higher rates of recurrence of traits of milk productivity are the characteristic of low-yielding cows (group “<8706”), i.e. they had more consistency of traits during different lactations and animals with a high level of productivity did not differ in age constancy. At a high level of milk yield in cows of group “>10614” appeared a negative correlation of low and medium level (r = -0.423). It was also found a negative correlation of low and medium level between milk yield and protein content in milk (r = -0.007… -0.332). At lower milk yields, there is no negative correlation between milk yield and fat content in milk. Thus, the existence of a negative correlation between milk yield and fat content in milk at a high level of animal productivity, and between milk yield and protein content in milk at both high and low levels of cow productivity was proved.

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