MILK PRODUCTIVITY AND TRUENESS TO TYPE OF BROWN SWISS COWS OF THE SMOLENSK REGION

2021 ◽  
pp. 30-34
Author(s):  
О.В. ТАТУЕВА ◽  
Д.Н. КОЛЬЦОВ
Keyword(s):  
Yield Coefficient ◽  
Body Measurements ◽  
Milk Productivity ◽  
Brown Swiss ◽  
The Third ◽  
Production Type ◽  
Significant Difference ◽  
Milk Cows ◽  
Second Phases ◽  
Selection Of

Изучена молочная продуктивность коров бурой швицкой породы и определена ее производственная типичность в условиях Смоленской области. Исследования показали, что в породе преобладают животные молочного (36%) и низкомолочного (31%) типов, при этом высокомолочные коровы составляют 26% от всего поголовья. Рассчитанные усредненные значения коэффициента производственной типичности (КПТ) и индекса производственной типичности (ИПТ) находятся в пределах 3,00—3,99 ед., то есть изучаемых животных возможно отнести к классу молочных. Отмечено снижение значений результатов типичности от 1-ой к 3-ей лактации на 0,04—0,03 ед. (Р≤0,001).Экстерьер коров в зависимости от производственного типа имеет, в основном, недостоверную разницу между значениями промеров, но позволяет определить их соответствие типу. Следует отметить значительную разницу у коров всех лактаций глубины груди — 8,4—10,0 см (Р≤0,001), косой длины туловища — 5,6—8,2 см (P≤0,001). Интенсивность удоя в первую и вторую фазы лактации в зависимости от производственного типа увеличивается от 1-й к 3-й лактации. У коров всех производственных типов происходит снижение коэффициента устойчивости от 1-й к 3-й лактации и составляет 0,9—13,3%. Результаты коэффициента молочности постепенно увеличиваются от 1-й лактации к 3-й, кроме группы высокомолочных коров. Полученные данные обеспечат достоверность отбора лучших животных для дальнейшей селекции, повысят точность определения производственного типа, ускорят проведение оценки, поскольку для установления направления продуктивности животных целесообразно ее проводить по окончании 1-й лактации путем расчета КПТ и ИПТ. Итог — получение стад соответствующего направления продуктивности в зависимости от пожеланий собственника. The milk productivity of Brown Swiss cattle was studied and its trueness to type assessment was carried in the Smolensk region. The survey of the breed was showed that it is dominated by animals of the milk (36%) and low-milk (31%) types, while high-milk ones make up 26%. The observed average values of the trueness to type coefficient (TTC) and the index trueness to type of (ITT) are in the range of 3.00—3.99 points, that is, the studied animals may be classified as milk. There was a decrease the results to type from 1 to 3 lactation by 0.04—0.03 points (P≤0.001). The exterior of cows, depending on the production type, has mainly an unreliable difference between the values of body measurements, but what it allows to determine their compliance with the trueness to type. It should be noted a significant difference in the chest depth in all lactation 8.4—10.0 cm (P≤0.001), the oblique body length 5.6—8.2 cm (P≤0.001). The rate of production in the first and second phases of lactation, depending of the trueness to type, increases from 1 to 3 lactation. In all cow’s trueness to types, the coefficient of lactation stability decreases from the first to the third lactation and is 0.9 - 13.3%. The results of the milk yield coefficient gradually increase from 1 lactation to 3, except for the group of high-milk cows. The obtained results will ensure the reliability of the selection of the best animals for further breeding, increase the accuracy of determining the trueness to type, step up the assessment, since it is advisable to conduct it after the end of the first lactation by calculating the TTC and ITT to determine the direction of animal productivity. The result is the receipt of herds of the appropriate direction of productivity, depending on the wishes of the owner.

COMPARATIVE DESCRIPTION OF MILK PRODUCTIVITY OF COWS UKRAINIAN RED-AND-WHITE DAIRY CATTLE AND UKRAINIAN BLACK-AND-WHITE DAIRY CATTLE AND HOLSTEIN BREEDS IN SERF «OLEKSANDRIVSKE»

2016 ◽  
Vol 52 ◽  
pp. 6-12 ◽  
Author(s):  
M. V. Gladiy ◽  
G. S. Kovalenko ◽  
S. V. Priyma ◽  
G. A. Holyosa ◽  
A. V. Tuchyk ◽  
...  
Keyword(s):  
Dairy Cattle ◽  
Dairy Cows ◽  
Milk Yield ◽  
Fat Content ◽  
Holstein Cows ◽  
Milk Productivity ◽  
Black And White ◽  
The Third ◽  
Fat Yield ◽  
Selection Of

The main goal of dairy breeds selection should be improving breeding and productive qualities of animals under modern conditions. The majority of farms, using native breeds to produce milk, has created optimal conditions for keeping and feeding, selection and matching, growing of replacements etc. Further improvement of created native dairy breeds for economically useful traits occurs at total use of purebred Holstein bulls (semen) of foreign selection. In order to realistically assess milk productivity (milk yield, fat content in milk and fat yield) of Ukrainian Black-and-White and Red-and-White Dairy cows should be conducted a comparative analysis of Holstein cows under the same conditions of feeding and keeping. It was established that Ukrainian Red-and-White Dairy cows were characterized by the highest milk yields for 305 days of all lactations, taken into account, the among three investigated breeds. Their milk yield during the first lactation was 5933 kg of milk, during the second – 6393 kg, the third – 6391 kg and during higher lactation – 6650 kg. Ukrainian Black-and-White Dairy cows were second by milk yield (except for the second lactation), during the first lactation – 5932 kg of milk, the third – 6462 kg and higher – 6541 kg, and Holstein cows were third, during the first lactation – 5794 kg of milk, the second – 6381 kg, the third – 6335 kg and higher – 6469 kg. The fat content was almost the same and varied within 3.49-3.58% in milk of Ukrainian Red-and-White Dairy cattle, 3.50-3.60% in milk of Ukrainian Black-and-White Dairy cattle and 3.50-3.56% in Holsteins’ milk. The difference between the breeds was within 0.01-0.04%. All the investigated breeds had predominance in fat yield for three lactations over standards of these breeds: Ukrainian Red-and-White Dairy cows from 75.1 to 93.4 kg, Ukrainian Black-and-White Dairy cows – 75.1-89.0 kg respectively and Holstein cows – 41.9-60.2 kg. It was found different level of positive correlation between milk yield and fat yield in all the cases and high correlation (r = 0.604-0.921, P < 0.001) in five cases (41.7%) Negative correlation coefficients indicate that selection of animals to higher milk yield in the herd will decrease the second trait – fat content in milk. Positive and highly significant correlation between milk yield and fat yield indicates that selection of cows in the herd to higher milk yields will increase fat yield. It was revealed that bulls were among the factors impacted the milk productivity (milk yield, fat content, fat yield) of three investigated breeds. So, the force (η²x) of father’s impact on milk yield was15.4-47.9%, fat content – 22.0-43.4% and fat yield – 14.9-47.7% taking into account a lactation and a breed. The force of lines impact (η²x) was second; it was on milk yield 6.1-24.5%, fat content – 4.1-17.1 and fat yield – 5.8-23.5%. The force of breeds impact (η²x) was last; it was on milk yield 0.3-2.9%, fat content – 0.2-0.3% and fat yield – 0.6-2.7%. So, the comparative studies of milk productivity of Ukrainian Red-and-White and Black-and-White Dairy cattle with Holsteins indicate that under similar conditions of feeding and keeping, these native breeds can compete with Holstein cattle. The milk yield for 305 days of higher lactation was 6650 kg of milk in Ukrainian Red-and-White Dairy cows, 6541 kg in Ukrainian Black-and-White Dairy cows and 6469 kg in Holsteins. It was found the inverse correlation r = -0.025-0.316 between milk yield and fat content in milk in most cases. Selection and matching of animals in the herd should be carried out simultaneously on these traits. It was found positive repeatability of milk yields between the first and second, the third and higher lactations (rs = 0.036-0.741), indicating the reliability of forecasting increase in milk productivity during the next lactations in all herd. Bulls have the greatest impact (η²x) on milk productivity among the factors taken into account: milk yield – 15.4-47.9%, fat content in milk – 22.0-43.4% and fat yield – 14.9-47.7%.

scholarly journals Reproductive ability and milk productivity of cows depending on breeding value of their progenitors

2017 ◽  
Vol 19 (74) ◽  
pp. 48-51
Author(s):  
L. V. Ferenz
Keyword(s):  
Milk Production ◽  
Milk Yield ◽  
Live Weight ◽  
Breeding Value ◽  
Milk Productivity ◽  
The Third ◽  
Reproductive Ability ◽  
Service Period ◽  
Significant Difference ◽  
The Difference

The influence of bullock`s different breeding value for reproductive ability and milk production of their  daughters were investigated. Established that the age of first productive insemination of heifers Ukrainian black spotted milk breed, was 17.5–18.6 months and age of first calving – 26.6–27.8 months. Heifers` live weight at the first insemination was 361.4–407.1 kg. During first lactation the highest productivity had daughters from parents with breeding value by milk yield more than 801 kg. In the first lactation wasn’t found significant difference in duration service-period and interparturition-period for cows derived from progenitors with different breeding value. In the second lactation best indexes in duration service-period and interparturition-period for cows derived from progenitors with breeding value by milk yield 601–800 kg and more than 801 kg. In the third, the highest lactation, these indexes were best for cows derived from progenitors with breeding value by milk yield 601–800 kg. The difference in milk yield during first lactation between heifers received from progenitors with breeding value by milk yield less than 200 kg and heifers from bullock`s  with breeding value 401–600 kg was 292 kg. The difference in milk yield between heifers received from progenitors with breeding value by milk yield less than 200 kg and heifers from bullock`s  with breeding value  with breeding value 601–800 kg  was 660.3 kg. The difference in milk yield between heifers received from progenitors with breeding value by milk yield less than 200 kg and heifers from bullock`s  with breeding value more than 801 kg was  920.8 kg In the second lactation this difference was 589.8 (Р < 0.001), 841.5 (Р < 0.001) і 894.4 (Р < 0.001) kg of milk, in the third, the highest lactation – 754.5 (Р < 0.001), 951.8 (Р < 0.001) і 1335.7 кг (Р < 0.001).

scholarly journals The Productivity of the Holstein Cows in the Process of Adaptation to the Conditions of the Iindustrial Complex of the Yaroslavl Region

2020 ◽  
Author(s):  
О.В. Филинская ◽  
М.Ю. Лапина ◽  
С.В. Зырянова
Keyword(s):  
Milk Yield ◽  
Fat Content ◽  
Dry Period ◽  
Milk Productivity ◽  
Mothers And Daughters ◽  
The Third ◽  
Reproductive Ability ◽  
Service Period ◽  
Industrial Complexes ◽  
Selection Of

Исследования проводились на одном из промышленных комплексов Ярославской области. Целью исследований являлась оценка по основным признакам продуктивности импортного скота голштинской породы селекции Нидерландов и их дочерей. Было установлено, что как матери, так и дочери имели удлинённую лактацию. Коровы импортной селекции имели высокую молочную продуктивность с первой лактации, которая составила 5597 кг с МДЖ и МДБ 4,23 и 3,38% соответственно, к третьей лактации удои увеличились до 6611,8 кг, МДЖ составила 4,35%, МДБ – 3,37%. Дочери достоверно превосходили своих матерей по продуктивным признакам, за исключением содержания белка по первой лактации, жира и белка – по третьей лактации. На комплексе и матери, и дочери имели удовлетворительную воспроизводительную способность. Выше принятых норм были продолжительность сервис-периода, сухостойного периода, возраст первого осеменения. При этом у дочерей сервис-период был меньше на 60,3 дня. Увеличение удоя является положительным показателем адаптации, с другой стороны, удовлетворительные показатели воспроизводства указывают на трудности адаптации импортного скота. Реализация продуктивных признаков имеет важное значение при ведении селекционной работы со стадом. При определении корреляции дочерей с матерями и генетического влияния наследуемости признаков от матерей была установлена корреляция по первой и третьей лактациям, соответственно: по удою – слабая отрицательная и слабая положительная, по содержанию жира в молоке – невысокая положительная, слабая отрицательная, по содержанию белка – положительная и отрицательная; наследуемость удоя, МДЖ и МДБ составила 45,1–48,3%, по третьей лактации наследуемость содержания жира от матерей – всего 12,4%. Основными причинами выбытия как матерей, так и дочерей послужили проблемы с воспроизводством, болезни конечностей и вымени. Меньше всего коровы выбывали из-за низкой продуктивности. Средний возраст использования матерей составил 1,6 лактации, у дочерей – 1,8. The researches were carried out at one of the industrial complexes of the Yaroslavl region. The aim of the research was to evaluate of imported Holstein cattle of the selection of the Netherlands and their daughters by the main characteristics of the productivity. It was found that both mothers and daughters had elongated lactation. Cows of imported selection had high milk productivity from the first lactation which was 5597 kg with WCF and WCP 4.23 and 3.38% respectively, by the third lactation milk yield increased to 6611.8 kg, WCF was 4.35%, WCP – 3.37%. The daughters were significantly superior to their mothers in productive features, with the exception of protein for the first lactation, fat and protein for the third lactation. In the complex both mothers and daughters had satisfactory reproductive ability. The duration of the service period, the dry period and the age of the first insemination were higher than the accepted norms. At the same time the service period for the daughters was 60.3 days less. The increase in milk yield is a positive indicator of adaptation on the other hand satisfactory reproduction rates indicate difficulties in adapting imported livestock. The realization of productive characteristics is important when conducting breeding work with a herd. When determining the correlation of daughters with mothers and the genetic influence of the heritability of signs from mothers, a correlation was established for the first and third lactations, respectively: by the milk yield – meanly negative and meanly positive, by fat content in milk – low positive, meanly negative, for protein content – positive and negative; the heritability of milk yield, WCF and WCP were 45.1–48.3%, according to the third lactation the heritability of fat content from mothers was only 12.4%. The main reasons for cow disposal of both mothers and daughters were problems with reproduction, diseases of the limbs and udders. Least of all cows were culled due to low productivity. The average age of use of mothers was 1.6 lactation, for daughters – 1.8.

scholarly journals FORMING OF ECONOMIC-AND-USEFUL TRAITS OF COWS IN DEPEND OF ORIGIN BY FATHER

2017 ◽  
Vol 54 ◽  
pp. 50-58
Author(s):  
G. D. Ilyashenko
Keyword(s):  
Dairy Cows ◽  
The State ◽  
The Body ◽  
Reproductive Capacity ◽  
Linear Classification ◽  
Milk Productivity ◽  
The Third ◽  
Breed Type ◽  
The Difference ◽  
Selection Of

The increase in the productivity of dairy cows significantly depends on the qualitative selection, evaluation and intensive use of procreator bulls with breeding value both for milk production and exteriors. The proper selection of bull for reproduction the herd is an important and responsible measure as the heredity of the procreators in the genetic improvement of breeds is extremely high, especially at the present stage of breeding. The aim of the research was to determine the level of influence of father's origin on dairy productivity, exterior and reproductive capacity of Ukrainian Red dairy cows in the conditions of the Central region. Materials and methods. The research was carried out on the basis of zootechnical records in a herd breeding plant for the breeding of the Ukrainian Red dairy breeds of cattle of the State Enterprise of Experimental Household «Elitne» of the Kirovograd SAES NAAS. The analysis involves the materials of the formed electronic database on indicators of milk productivity, reproductive capacity and structure of the body of cows for the year 2015. Estimation of the exterior type of cows was conducted using the linear classification method at the age of 2–4 months after calving in two systems - 9-ball, with a linear description of 18 articles of the exterior and 100-point classification system, taking into account four sets of breeding grounds, which characterize: the severity of the dairy type, the development of the body, the state of the limbs and the morphological qualities of the udder. In the exterior, the half-sisters groups of 6 bulls with a population of 28 to 118 cows were compared. The force of origin's influence on the father was calculated by one-factor dispersion analysis. The calculations were carried out using the methods of mathematical statistics using the software package "STATISTICA-6.1". Results of the research. By comparison of group average, a significant level of differentiation of the bulls in the herd of the breeder is determined by the characteristics of their daughters. By the age of the first calving, the difference between the best and worst half-sistesr groups reached 283 ± 148,9 days or 36,5 %, with a reproduction rate of 0,181 ± 0,180 or 21,0%, for the livelihood of 305 days of first lactation – 2890 ± 959 kg оr 78,3% (P < 0,01), the second one was 2112 ± 926 kg or 40,9% (P < 0,05), the third group was 113 ± 521 kg or 18,4% (P < 0,05). In terms of the content of fat in milk, the intergroup difference was 0,38 ± 0,294% (td = 1,29) for the first, 0.64 ± 0,155% (td = 1,62) for the second and 0,44 ± 0,311% (td = 2,03) – for the third lactation, for protein content – the difference was insignificant. Among the daughters of the studied protectors, the highest tastes for the first lactation were characterized by daughters of Tsvitka 435, Roman Reda 86883, Diplomat 401497. For the second and third Rainer 23685, Tsvitka 435, Hens Reda 398624, below all lactations of the Vendian 67955 and Cup 405. Noticed, Cvitok 435, holsteinized bull of intrarenal type of Ukrainian Red dairy breed, for the dignity of its daughters, exceeded all Holstein breeders, used in the herd. Summarized, according to the results of the classification of the four complexes exterior signs, the assessment shows the level of expression of the exterior type and suggests that it is best at the daughters of Bensons Hens Red 398624, Jorin 114414759 and Tsvitka 435. Reduce the gap between the actual estimate and the maximum possible, which is respectively 5,5, 5,7 and 6,2 points, possibly due to the quality control of the stock herd by the exteriors in the herds with the selection of procreator-bulls, estimated by the type of daughters. Conclusions. The study of milk productivity and reproductive ability of cows definited the level of differentiation between the groups of half sisters by father. The difference between the groups on separate grounds is 78,3%. At the same time, cows of the Holstein and Holstinizovany In-breed Type (HRD) of Ukrainian Red dairy breeds have a marked advantage over milk yield. The worst manifestation of the features – in animals of the bulls of Angler and Rich-Milkfat In-breed Type (FRD) of Ukrainian Red dairy breeds. Using of linear classification allowed to differentiate sufficiently the bull-producers by the exterior characteristics of the structure of the body and the mummies of their daughters. The high variability of descriptive articles indicates the need for their improvement in a part of the animals of the study population. The influence of the genetic factor of the father's origin on the variability of the considered characteristics ranged from 12 to 36%.

REPRODUCTIVE CHARACTERISTICS OF BROWN-BREEDED COWS, DEPENDING ON GENOTYPE AND MILK PRODUCTIVITY

1970 ◽  
pp. 59-61
Author(s):  
А. S. Gerasimova ◽  
O. V. Tatueva ◽  
Е. А. Prischshep ◽  
D. N. Koltsov ◽  
V. I. Tsys
Keyword(s):  
Positive Impact ◽  
Animal Husbandry ◽  
Reproductive Capacity ◽  
Industrial Processes ◽  
Power Coefficient ◽  
Economic Losses ◽  
Calving Interval ◽  
Milk Productivity ◽  
Brown Swiss ◽  
Selection Of

Reproduction along with milk productivity is one of the main indicators for improving the profitability of milk production, but one of the most labour-intensive industrial processes. Because of decreasing of animal fertility the farms have huge economic losses. Only from keeping dry cows with animal yield and milk undersupply the animal husbandry farms have billion-rouble losses. The reproductive features of animals in accordance with maximum productivity (yield of milk) were studied depending on the breeding methods, pedigree of upgrade breed (Brown Swiss breed of American selection), were estimated by the age of the first calving, service-, calving interval, the reproductive power coefficient (RPC). The results of studies have shown that to improve reproduction in the herd of APC "Druzhba" it is necessary to take into account the level of milk yield (5000 kg and above), the bloodiness of the improving breed (25.1% BS American selection), the pair selection of origin at the cross lines. These measures will reduce the level of open days and calving interval, which will have a positive impact on the coefficient of reproductive capacity and reproduction dynamics in general.

scholarly journals BEEF COWS BODY CONDITION SCORING AND ITS MEASUREMENTS RELATIONSHIP

2020 ◽  
Vol 5 (2) ◽  
pp. 40-46
Author(s):  
Ismagil Khakimov ◽  
Rinat Mudarisov ◽  
Aleksandr Akimov
Keyword(s):  
Positive Relationship ◽  
Regression Coefficient ◽  
Live Weight ◽  
Beef Cows ◽  
Body Measurements ◽  
The Third ◽  
Condition Score ◽  
Body Condition Scoring ◽  
The Difference ◽  
Selection Of

The purpose of the study is improving the efficiency of breeding work in selection of cows by live weight, body measurements with mandatory consideration of animal condition score. The degree and nature of relationship be-tween live weight and body measurements of beef cows with condition score, regression coefficient were calculat-ed. The research was carried out on beef Hereford and Kazakh white-headed cows. A high positive relationship between live weight, body measurements and the condition score of cows was established. The regression coeffi-cient showed that change in finish by 1 point increases the live weight of Hereford cows of the first group by 46.3 kg, the second – by 44.2 kg, and the third – by 42.1 kg. The cows of the second group have the largest bulk, they signif-icantly exceeded the Hereford and Kazakh white-headed cows of the first and third groups by this indicator. The difference was 51.2 and 45.9 kg, respectively, the coefficients of variability – varied between 4.1 to 9.2%. Hereford Cows of the second group were superior in heart girth (with a difference of 4 cm) to cows of the first group and 10.6 cm to cows of the third group. The coefficients of variability ranged within 12.9 to 27.0 %. In terms to heart girth (by 1.05 and 0.95 cm) and chest depth (by 8.9 and 2.9 cm), the cows of the second group were superior to the cows of the first and the third groups, respectively (the difference is not reliable). The variation coefficients ranged within 10.3 to 15.7% for heart girth and from 13.0 to 16.7% for chest depth.

A Comparison of Four Adolescent Language Tests

1987 ◽  
Vol 18 (3) ◽  
pp. 250-266 ◽  
Author(s):  
R. Jane Lieberman ◽  
Ann Marie C. Heffron ◽  
Stephanie J. West ◽  
Edward C. Hutchinson ◽  
Thomas W. Swem
Keyword(s):  
Test Performance ◽  
Sixth Grade ◽  
Significant Discrepancy ◽  
Language Impaired ◽  
Language Functions ◽  
Language Tests ◽  
Significant Difference ◽  
Sixth Grade Students ◽  
Overall Performance ◽  
Selection Of

Four recently developed adolescent language tests, the Fullerton Test for Adolescents (FLTA), the Test of Adolescent Language (TOAL), the Clinical Evaluation of Language Functions (CELF), and the Screening Test of Adolescent Language (STAL), were compared to determine: (a) whether they measured the same language skills (content) in the same way (procedures); and (b) whether students performed similarly on each of the tests. First, respective manuals were reviewed to compare selection of subtest content areas and subtest procedures. Then, each of the tests was administered according to standardized procedures to 30 unselected sixth-grade students. Despite apparent differences in test content and procedures, there was no significant difference in students' performance on three of the four tests, and correlations among test performance were moderate to high. A comparison of the pass/fail rates for overall performance on the tests, however, revealed a significant discrepancy between the proportions of students identified in need of further evaluation on the STAL (20%) and the proportion diagnosed as language impaired on the three diagnostic tests (60-73%). Clinical implications are discussed.

Displace of Documentary Heritage from the Soviet Union to Poland during the Third Decade of the XXth Century

2014 ◽  
Vol 3 ◽  
pp. 127-137
Author(s):  
Tatsiana Hiarnovich
Keyword(s):  
Soviet Union ◽  
International Agreements ◽  
Peace Treaty ◽  
Actual Process ◽  
Xxth Century ◽  
The Third ◽  
The Soviet Union ◽  
History Of ◽  
Selection Of

The paper explores the displace of Polish archives from the Soviet Union that was performed in 1920s according to the Riga Peace Treaty of 1921 and other international agreements. The aim of the research is to reconstruct the process of displace, based on the archival sources and literature. The object of the research is those documents that were preserved in the archives of Belarus and together with archives from other republics were displaced to Poland. The exploration leads to clarification of the selection of document fonds to be displaced, the actual process of movement and the explanation of the role that the archivists of Belarus performed in the history of cultural relationships between Poland and the Soviet Union. The articles of the Treaty of Riga had been formulated without taking into account the indivisibility of archive fonds that is one of the most important principles of restitution, which caused the failure of the treaty by the Soviet part.

MODEL OF SOCIAL POTENTIAL OF CHILDHOOD IN THE RUSSIAN REGIONS: THE RESULTS OF EXPERIMENTS

2019 ◽  
pp. 152-162
Author(s):  
A.G. Filipova ◽  
A.V. Vysotskaya
Keyword(s):  
Third Wave ◽  
Russian Regions ◽  
The Third ◽  
Control Factors ◽  
Social Potential ◽  
System Input ◽  
Optimal Values ◽  
Fixed Ideal ◽  
And Control ◽  
Selection Of

The article presents the results of mathematical experiments with the system «Social potential of childhood in the Russian regions». In the structure of system divided into three subsystems – the «Reproduction of children in the region», «Children’s health» and «Education of children», for each defined its target factor (output parameter). The groups of infrastructure factors (education, health, culture and sport, transport), socio-economic, territorial-settlement, demographic and en-vironmental factors are designated as the factors that control the system (input parameters). The aim of the study is to build a model îf «Social potential of childhood in the Russian regions», as well as to conduct experiments to find the optimal ratio of the values of target and control factors. Three waves of experiments were conducted. The first wave is related to the analysis of the dynam-ics of indicators for 6 years. The second – with the selection of optimal values of control factors at fixed ideal values of target factors. The third wave allowed us to calculate the values of the target factors based on the selected optimal values of the control factors of the previous wave.

REALIZATION OF PARENTAL INDICES OF COW PRODUCTIVITY IN DIFFERENT MILKING BREEDS AT BREEDING FARM "AGROFIRMA "PAKHMA"

2020 ◽  
Keyword(s):  
Milk Yield ◽  
Cattle Breed ◽  
Holstein Cattle ◽  
Milk Productivity ◽  
Cattle Breeds ◽  
Significant Difference ◽  
Production Indices ◽  
High Level ◽  
Beta Lactoglobulin ◽  
Percentage Protein

Combination of genotypes of main types’ genetic markers causes milk productivity in cattle. The article studies correlation between kappa casein genotypes (C3N3), beta-lactoglobulin (LGB), their complexes and milk production indices in cows bred under equal conditions at a breeding farm. The calculation of parental milk yield and fat indices between the three breeds showed a significant difference (P>0,999) of PCI of Ayrshire and Holstein cattle breed milk yield - 3395 kg, PCI of fat - 0,22%; between Holstein and Yaroslavl cattle breeds - 3200 kg, PCI offat - 0,16%. A significant difference of realization indices of protein between all three breeds was not stated. The highest realization ofparental milk yield index was stated - between Ayrshire and Yaroslavl cattle breeds- 113%, Holstein cattle breed - 88%. As for the fat and protein indices, all three cattle breeds showed a high realization of PCI from 98% to 109%. However, Holstein cattle breed showed the highest percentage: protein - 101%, fat - 109%. A significant difference of PCI realization of milk productivity in CSN3 and LGB genotypes was not stated. It was also stated that there is a tendency of high level parental indices realization when there is a higher number of B-allele variants in genotypes of cows.

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