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

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%).

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 CONDITIONALITY OF PRODUCTIVE LONGEVITY AND LIFELONG PRODUCTIVITY OF COWS OF BLACK-WHITE BREED BY GENETIC FACTORS

2017 ◽  
Vol 53 ◽  
pp. 222-227
Author(s):  
T. M. Komendant
Keyword(s):  
Milk Yield ◽  
Milk Fat ◽  
Total Duration ◽  
Statistical Processing ◽  
Lactation Period ◽  
Milk Productivity ◽  
Holstein Breed ◽  
Long Period ◽  
The Impact ◽  
Economic Use

Objective: to study the dependence of productive longevity of cows of black and motley breed on genetically determined factors - linearity and bloodiness in Holstein breed. Methods: zootechnical, biological, statistical. The materials of the studies were pedigree cards of cows  and bulls, bull catalogs, zootechnical reports on pedigree work with the herd, the cattle base of the Grodno region, and also registers of rearing and rearing of the litter. To study the effect on the longevity of cows and their lifelong productivity of the "linear accessory" factor, all animals that were eliminated in 2006-2014 were divided into groups according to the lines: Adema 25437, Annas Adema 30587, Vis Eidial 933122, Montvik Chiftein 95679, Nico 31652 , Pabst Governera 882933, Reflection Sovering 198998, S. Sensation 1267271, Hiltes Adema 37910. Depending on the bloodiness of the Holstein breed, the animals were divided into four groups: I - up to 25% of Holstein genes, II- 25,0 – 49,9% of the genes of the Holstein genus, III - Holstein blood 50% and more, IV - purebred black-motley cows. Indicators of milk productivity (life-time milk yield (kg) and lifetime yield of milk fat (kg), milk yield for 1 day of lactation (kg), total duration of the lactation period (days) were studied in the experimental animals, and the duration of economic use (lactations). Main results. The results obtained during the statistical processing of data indicate that the cows belonging to the Pabst Governera line 882933 differed in the longest period of economic use among the abandoned animals. Duration of use in animals of this line was 8.43 lactations, which is more than for cows of other lines at 1,72-6,67 lactation. It should be noted that cows belonging to the Adem 25437 lines (6,71 lactations) and S. Sensation 1267271 (5,49 lactations) were also characterized by a rather long period of economic use. Due to the long period of use of the cow, the Pabst Governera line 882933 had the highest indicator of lifelong milk yield – 51535,58 kg of milk and the yield of milk fat – 1914,03. But as for milk for one day of lactation, here the leadership belonged to individuals belonging to the line Vis Eidial 933122 and amounted to 21,19 kg of milk per day. Also, a fairly high indicator of milk yield for one day of lactation was observed in animals belonging to the line Montvik Chiftain 95679 – 21,02 kg of milk. As a result of the research it was found that the largest term of economic use was characterized by low-breed hybrids with Holstein breed (up to 25%) – 3,63 lactations. This group of animals exceeded the individuals of the remaining groups by 0,21-0,76 lactations. It is worth noting that purebred black-motley individuals also differed by a long period of productive use – 3,42 lactations. Conclusions. Analysis of the impact on productive longevity and indicators of lifetime productivity of the "linearity" factor among abandoned animals in the "Progress-Vertelishki" made it possible to establish the existence of significant differences in the duration of economic use of cows of different linear affiliation. Cows of the Pabst Governera line 882933 – 8,43 lactations, 51535,58 kg of milk and 1914,03 kg of milk fat were distinguished by the greatest period of productive longevity, and also by the highest milk yield and milk fat content. It was established that the crossing of black and white cattle with Holstein breed positively influenced the productive longevity of animals, but on condition that the blood on the improving rock did not exceed 25%. Low-breed hybrids with Holstein breed exceeded the animals of other groups by the duration of their economic use by 0,21-0,76 lactations. Thus, we recommend breeding cows of black and motley breeds in the "Progress-Vertelishki", taking into account the impact on productive longevity and milk productivity of such factors as linearity and bloodiness in Holstein breed.

Milk productivity of cows of Black-and-White breed depending on the part of Holstein blood

2020 ◽  
pp. 16-29
Author(s):  
T. Shishkina ◽  
T. Guseva ◽  
A. Galiullin ◽  
N. Semikova
Keyword(s):  
Milk Yield ◽  
Milk Fat ◽  
Milk Productivity ◽  
Black And White ◽  
Holstein Breed ◽  
Genetic Potential ◽  
White Breed ◽  
New Generation ◽  
Economic Use ◽  
Best Parameters

A retrospective analysis of the dynamics of traits of milk productivity of Black-and-White cows with increased the part of Holstein breed blood has been carried out. Two groups have been formed from the number of culling animals of two adjacent generations: the 1st group (basic generation) with the part of Holstein breed blood of 3/4 (75 %) and the 2nd group with the part of Holstein breed blood of 7/8 (87,5 %) per 35 heads in each. As a result, it has been found that cows with the part of blood of 7/8 had the best indicators of milk productivity for I, II and III lactation. They significantly exceeded the indicators of cows with part of Holstein blood of 3/4 in terms of milk yield and yield of milk fat. The decrease in average daily milk yields for months of lactation in high-blooded cows was lower by 3 %, and the indicator of full-competed lactation was higher by 17,8 %. High-blooded animals have been culled out of the herd more intensively. By the end of the third lactation, the livability of livestock in the 1st group was 100 %, and in the second group – 23 %. The best parameters of productive longevity were distinguished by animals of the basic generation with the part of Holstein breed blood of 3/4. They signifi cantly surpassed of high-blooded animals in terms of longevity and period of productive longevity, respectively, by 1109 (P < 0,001) and 739 (P < 0,001) days, and in terms of lifetime milk yield – by 14392 kg (P < 0,001). The increase of the part of the blood of cows to 7/8 was carried out using purebred producers of foreign selection, the new generation of high-blooded animals had a relatively high genetic potential. However, 7/8-blooded cows of Holstein breed used it only by 53,4 %, which was by 24,3 % (P < 0,001) lower than the base generation. Thus, in the current environments of CJSC “Konstantinovo” high-blooded animals of Holstein breed do not suffi ciently realize the genetic potential, and the increase in productivity is associated with the loss of milk due to the decrease in the duration of economic use of animals. Based on this, we propose at the present stage to suspend the upgrading crossbreeding and return to the using Holsteinized sires domestic selection with the part of Holstein breed blood of 75 to 85 %.

THE FORMATION OF FACTORY FAMILIES OF UKRAINIAN BROWN DAIRY BREED

2017 ◽  
Vol 54 ◽  
pp. 106-112
Author(s):  
Y. I. Sklyarenko ◽  
T. O. Chernyavska ◽  
L. V. Bondarchuk ◽  
I. P. Ivankova
Keyword(s):  
Milk Production ◽  
Milk Yield ◽  
Milk Fat ◽  
Statistical Processing ◽  
State Enterprise ◽  
Average Lifetime ◽  
Milk Productivity ◽  
Average Value ◽  
Economic Use ◽  
Dairy Breed

The aim of the research was to study milk production of many factory families of Ukrainian Brown dairy breed and study the influence of origin on the indices of milk yield, duration and effectiveness of lifetime use of cows. Method. For research allocated 9 factory families of Ukrainian Brown dairy breed of State Enterprise «Experimental Farm of Institute of Agriculture of Northern East of NAAS» (Valuty 413, Voli 8369, Laymy 8221, Miry 7209, Ryabuhy 9728, Sujety 6091, Tochky 8169, Chubarochky 7743, Shchepky 4344). Among the indicators of the duration and effectiveness of lifetime use of cows was determined the duration (days) of life, economic use of and of lactation, number of lactations for life, lifetime milk yield and yield of milk fat (kg) average lifetime content (%) fat in milk, milk yield (kg) per day of life, economic use and lactation. The coefficient of economic use was calculated (expression in percent) by the proposed method by Pelehaty M. S. et al. In addition were determined (also in percentage) coefficient of lactation and the coefficient of productive use offered by Polupan Y. P. Milk productivity of the animals was evaluated according to the materials of the primary zoo-technical account. Statistical processing of results of studies was conducted by methods of mathematical statistics using the PC. The results of the research. By analyzing the productivity of cows managed to identify a significant level of specificity and differentiation of families according to the indications. Of the 90 cows accounted for the highest productivity of lactation, 28, or 31%, had hopes of 5.0 thousand kg and above. Most of these cows had family, Miry 7209 (67%), Ryabuhy 9728 (57%), Valuty 413 (55%), Shchepky 4344 (50%), less-Sujety 6091 (36%), Chubarochky 7743 (33%), Tochky 8169 (25%), Laymy 8221 (16%), Voli 8369 (10%). Over a long period of economic use and lactation of animals of Valuty 413 family resulted higher in comparison with other families a lifelong yield. The influence of the origin of cows on the indices of milk productivity and effectiveness for lifelong use was discovered. The origin of the family significantly influenced on milk yield for better lactation and milk yield per 1 day of life. Other indicators were not significant according to the origin, although they had high values (from 5.4 to 26.7%). So we can consider it expedient to work with families to improve the duration and effectiveness of lifetime use of cows. Conclusions. The highest average yield for the first lactation animals is characterized by animals of Ryabuhy 9728 family, the content of fat in milk – by animals of Voli 8369 family. Long average duration and a better efficiency is in the life of the cows of Valuty 413 family. The highest average milk yield in one day life had animals of Valuty 413 family. Animals of Valuty 413 family are allocated at the average value of the coefficient of economic use. Optimal average lactation animals belong to the Voli 8369 and Shchepky 4344 families. In some families identified animals that have a lifetime yield of more than 50.0 thousand kg of milk. The influence of the origin of cows on the indices of milk productivity and effectiveness of lifetime use was installed. Between separate parameters of milk production and indicators of the duration and effectiveness of lifetime use of a set of reliable correlation, the magnitude and direction of which are different in animals of different families.

scholarly journals Genotypic and paratypic factors formation of milk productivity of austrian schwyz breed cows in environmental area of origin

2016 ◽  
Vol 18 (2) ◽  
Author(s):  
I. Pishchan
Keyword(s):  
Milk Production ◽  
Milk Yield ◽  
Milk Fat ◽  
Milk Productivity ◽  
Mass Part ◽  
Genetic Potential ◽  
Total Milk ◽  
Productive Potential ◽  
High Selection ◽  
Economic Use

The article set out the materials of researches about the formation of the level of milk production of Austrian cows of Schwyz breed of different generations, depending on the genotype and paratypic factors at their area of ecological origin, considering of which will promote high selection. It was established that in the operation of animals in the area of environmental origin the level of lactic productivity of daughters varies between 5000 – 12000 kg per lactation, whereas their mothers do not exceed maximum index 12,800 kg, at the same time in the mother of father it exceeds 20000 kg. Thus, the qualitative composition of milk from different generations corresponds to the average consolidated of Schwyz breed. The mass part of the fat and protein in the milk of daughters is at the level 4,13 and 3.57%. The highest content of milk fat in mother of father, the mass of fat in the milk is an average of 4.37%. The dynamics of the implementation of milk production of daughters and their mothers on the continuation of the economic use is similar. In the first lactation the total milk yield of cows amounts respectively 6686.9 and 6261.8 kg of milk, in the second lactation, the level rises to 7532.2, and 7748.7 kg. In the future, there is a slight increase in the productivity and after the fourth lactation daughters and their mother’s milk yield is almost identical and is respectively 8138.3 and 81356 kg of milk. The implementation of the genetic potential of the father's mother passes on a higher level, that meet the requirements for this category of parent. In the first lactation from this cows was obtained 9276.3 kg of milk, and the second – 11599.6 kg. The highest level of productivity was observed in the third lactation where milk yield was an average of 11667.5 kg. After the fourth lactation milk yield decreased slightly, but did not fall below the figure 11139.3 kg. It is proved that the realization of the productive potential of the daughters of parents of highly close to that of a mother. If the productivity of the daughters of the average for the entire period of exploitation below the milk yield of their mothers only 87 kg, 4% milk, the index mother of father – to 3762 kg, or 48.5% (P < 0.001).

scholarly journals Dietary supplement of the rumen protected methionine and milk yield in dairy goats

2007 ◽  
Vol 50 (3) ◽  
pp. 273-278
Author(s):  
N. Poljičak-Milas ◽  
T. S. Marenjak
Keyword(s):  
Milk Production ◽  
Milk Yield ◽  
Milk Fat ◽  
Milk Protein ◽  
Control Period ◽  
Fat Content ◽  
Dairy Goats ◽  
Great Probability ◽  
The Third ◽  
On Farm

Abstract. The experiment was conducted on three farms of dairy goats. The experimental groups of animals were during the four months period supplemented with 5g Mepron®, (Degussa, Germany), daily. Milk yield, milk protein and milk fat content were recorded throughout the experiment. The milk production was statistically higher in the experimental group of animals on two farms, farm 1 and farm 3 in the first control period, a month after the application, whereas on farm 2, the higher milk production was present in the third and forth control period, two and three months after the application. During the experiment there was no statistically differences in milk protein and milk fat content between experimental and control groups on farm 1 and farm 2, whereas on farm 3 the milk fat content was statistically lower during the Mepron® supplementation. In conclusion, the higher milk production in the first control period on farm 1 and 3 with great probability referred to the influence of Mepron®. The higher milk production on farm 2 in the third and fourth control period coincided with introduction of alfalfa hay in daily ration, that may have enriched the amino acid supply.

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 QUALITY OF MILK PRODUCTION OF THE HOLSTEIN COWS DEPENDING ON DIFFERENT FACTORS

2020 ◽  
pp. 155-159
Author(s):  
Murodulla Eshonqulovich Ashirov ◽  
Khusniddin Abdiolimovich Donaev ◽  
Alo Askarovich Yuldashev
Keyword(s):  
Milk Production ◽  
Milk Yield ◽  
Milk Fat ◽  
Live Weight ◽  
Fat Content ◽  
Holstein Cows ◽  
Milk Productivity ◽  
Group I ◽  
Service Period ◽  
Local Selection

Studies have revealed that despite the selection, the Holstein cows have a high genetic potential of milk production and in all lactations it is good in the specific conditions of the hot climate of Uzbekistan. The milk production level of German cows for the first lactation was 6511.2 kg of milk with a fat content of 3.84%, the Dutch — 6653.0 kg with fat content of 3.95%, and local breed — 6495.2 kg with a fat content of 3.95%. All mature cows retained high milk production, for III lactation and older it was 7112.5 kg and 3.90%, 7266.0 kg and 3.90%, 6847.5 kg and 3.94%, respectively. The yield of Dutch breeding cows was higher for 1 lactation by 141.80–157.8 kg, for III lactation and older by 153.5–418.5 kg, the yield of milk fat by 12.8–6.3 kg, respectively, of indicators peers of German and local selection. The cows of the studied selections combined well with high milk yield and fat content. The level of 4% milk for the studied lactation in all cows was quite high and testified to its good nutritional value. Holstein cows of different breeds are distinguished by a strong dairy type. For I lactation, for every 100 kg of live weight, 1,159.0–1265.5 kg of milk was produced, for III lactation and older - 1200.0–1308.6 kg. It is revealed that milk productivity depends on the level of live weight of cows. The increase in body weight of cows in all groups provides an increase in milk yield, milk fat yield, milk yield of 4% milk. Milk productivity is interrelated with the duration of the service period. In group I, cows with a service period of 91–100 days were more productive, in group II, 81–90 and in group III, up to 80 days. The use of Holstein cows for the production of milk is effective and ensures an increase in its production, the creation of highly productive dairy herds and the production of high-quality maintenance stock. KEYWORDS: Holstein breed, herd, milk yield, milk, fat, selection.

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.

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