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%.

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 Operation of the alula as an indicator of gear change in hoverflies

2011 ◽  
Vol 9 (71) ◽  
pp. 1194-1207 ◽  
Author(s):  
Simon M. Walker ◽  
Adrian L. R. Thomas ◽  
Graham K. Taylor
Keyword(s):  
High Speed ◽  
Aerodynamic Force ◽  
Angular Acceleration ◽  
The State ◽  
The Body ◽  
Kinematic Parameters ◽  
Wing Kinematics ◽  
Change Mechanism ◽  
The Third ◽  
Gear Change

The alula is a hinged flap found at the base of the wings of most brachyceran Diptera. The alula accounts for up to 10 per cent of the total wing area in hoverflies (Syrphidae), and its hinged arrangement allows the wings to be swept back over the thorax and abdomen at rest. The alula is actuated via the third axillary sclerite, which is a component of the wing hinge that is involved in wing retraction and control. The third axillary sclerite has also been implicated in the gear change mechanism of flies. This mechanism allows rapid switching between different modes of wing kinematics, by imposing or removing contact with a mechanical stop limiting movement of the wing during the lower half of the downstroke. The alula operates in two distinct states during flight—flipped or flat—and we hypothesize that its state indicates switching between different flight modes. We used high-speed digital video of free-flying hoverflies ( Eristalis tenax and Eristalis pertinax ) to investigate whether flipping of the alula was associated with changes in wing and body kinematics. We found that alula state was associated with different distributions of multiple wing kinematic parameters, including stroke amplitude, stroke deviation angle, downstroke angle of incidence and timing of supination. Changes in all of these parameters have previously been linked to gear change in flies. Symmetric flipping of the alulae was associated with changes in the symmetric linear acceleration of the body, while asymmetric flipping of the alulae was associated with asymmetric angular acceleration of the body. We conclude that the wings produce less aerodynamic force when the alula is flipped, largely as a result of the accompanying changes in wing kinematics. The alula changes state at mid-downstroke, which is the point at which the gear change mechanism is known to come into effect. This transition is accompanied by changes in the other wing kinematic parameters. We therefore find that the state of the alula is linked to the same parameters as are affected by the gear change mechanism. We conclude that the state of the alula does indeed indicate the operation of different flight modes in Eristalis , and infer that a likely mechanism for these changes in flight mode is the gear change mechanism.

scholarly journals Interaction between the body condition score, gait, hindlimb conformation, and claw conformation in dairy cows in Aydin, Turkey

2022 ◽  
Vol 52 (4) ◽  
Author(s):  
Ibrahim Akin ◽  
Husnu Erbay Bardakcioglu ◽  
Elvan Hayat ◽  
Yalcin Alper Ozturan ◽  
Omer Kurt
Keyword(s):  
Dairy Cows ◽  
Body Condition ◽  
Body Condition Score ◽  
Present Knowledge ◽  
The Body ◽  
Breeding Strategies ◽  
Abnormal Gait ◽  
Increased Risk ◽  
Condition Score ◽  
Selection Of

ABSTRACT: Breeding strategies aim to reduce lameness in dairies by using predictor traits to increase the selection of dairy cows. This study enhanced the present knowledge about association between the claw conformations (CC), hindlimb conformation (HiLC), gait, and body condition score (BCS) in dairy cows. A total of 166 lactating Holstein cows were enrolled in the study and scored for BCS, CC, HiLC, and gait. The abnormal HiLC group was statistically significant (P<0.001) to have more abnormal CC. Hock in (Hin) cows showed significance (P<0.001) with CC abnormalities. Cows with abnormal gait have less abnormal claw and limb conformation than normal cows (P=0.032). Lactation number (P=0.036) and abnormal HiLC (P<0.001) were significantly increased risk for CC. The present results might be useful for claw and hindlimb conformations, and breeding strategies of the herd.

scholarly journals DAIRY PRODUCTIVITY AND EXTERIOR TYPE OF FIRST-CALVE COWS OF UKRAINIAN BLACK-AND-WHITE DAIRY BREED DEPENDING ON UDDER-MASO-METRIC INDEX

2019 ◽  
Vol 57 ◽  
pp. 102-110
Author(s):  
M. S. Pelehatyi ◽  
O. А. Kochuk-Iashchenko
Keyword(s):  
Classification System ◽  
Linear Classification ◽  
Milk Productivity ◽  
Score System ◽  
Group Iii ◽  
Black And White ◽  
The Difference ◽  
Complex Features ◽  
Dairy Breed

The theory and practice of breeding show that optimal results can be achieved by a complete evaluation of the genotype. The leading method of such an estimation is an index expression, which accumulates in one indicator the optimal ratio of breeding signs. In this aspect, it is important to use the breeding indices, which are estimated by the exteriors of animals, since breeding only on the indicators of milk productivity, namely on the level of fertility, contributes to the degradation of reproductive ability and, generally speaking, to the early extinction of the herd of animals. This determines the relevance of our work. The aim of the work was to study the effectiveness of selection first-born cows by the udder-mass-metric index in the herd of Ukrainian Black-and-White dairy breed.The research was carried out on 198 first-born cows Ukrainian Black-and-White dairy breed PAC "Yerchi". We used the basis of breeding records and the results of their own research.The differentiation of cows by the size of the wizard-mass-metric index was carried out according to the methodology of O. P. Polkovnikova wiith co-authors. Groups are conventionally called early, optimal and late.The results of our research showed that the first-born cows of the Ukrainian Black-and-White dairy breed, separated by the size of this index, significantly differ in their complexes features of the 100-score system of linear classification of the exterior type. The studied animals of the three groups for all the complexes of the 100-score system received rather high ratings: from 78.8 to 81.9 points, which corresponds to the classes "good" and "good with the plus" in accordance with international requirements.In general, there is a clear tendency that with an increase in the value of the udder-mass-metric index there is an increase in the overwhelming majority of complex features of linear classification, except for the complex features of the exterior, which characterizes the development of the body and gives an idea of the size of animals. Better were animals of groups II.With the increase in the size of the udder-mass-metric index in cows, the level of assessments of the main descriptive traits is also significantly increased. The best indicators of the descriptive features of the linear classification of the exterior were the group of animals of the Ukrainian Black-and-White dairy breed, which, according to the value of the udder-maso-metric index, are classified as high-value groups of magnitude 16.9 or more. units, the worst – animals of the first group (11.7 and less than units of scientists). The difference between animals of the best and worst groups in 50% of cases was reliable (P < 0.05–0.001).The dynamics of dairy productivity in a certain way "copies" the dynamics of group and descriptive signs of the exterior type of animals. That is, with the increase of the size of the udder-mass-metric index there is a linear increase in quantitative characteristics of milk productivity.The animals of the group III showed the best results in PAC “Yerchyky”. From them received 305 days of the first lactation of 6036 kg with fat content of 3.63% and the amount of milk fat and protein, respectively, 218 and 185.0 kg. The lowest counts are first-born cows of group I (5390, 3.57, 193.5 and 166.3 respectively). Animals of group II occupy an intermediate position. The difference between the groups of animals for milk productivity, differentiated by the size of the exterior index in 40% of cases was reliable.The distribution of animals by the size of the extermination index (UMMI) completely copies their location according to the overall assessment of the exterior type and the 305 days lactation, which again confirms the existence of a direct correlation between these features. That is, differentiation and selection of animals by the size of the udder-mass-metric index can be an effective method for improving the milk production and exterivation of animals in the milk breed herd of PAC “Yarchiki”.With the help of the exterior index, we can predict milk productivity, that is, with the increase in the value of UMMI per unit milk productivity, namely, milk for 305 days of lactation, increases by 323 kg.Increasing the value of the udder-mass-metric index is accompanied by an increase in the consolidation factor for all the blocks of attributes. That is, the selection with the maximum value of the index of group III will help to increase the typification of animals by the exterior type and productivity.We also studied the influence of the exterior index on the manifestation of exterior and productivity. The results of this analysis showed that the share of this index in the overall variability of the signs varies within the range of 1.87–16.88 among the signs of the 100-score linear classification system and 0.31–7.92 among the signs of milk productivity, but it should be noted, that in 70 and 80% of cases the force of influence was reliable, respectively (P < 0,05–0,001). On average, the impact strength of the 9-point linear classification system was 2.94%.

scholarly journals ESTIMATION OF HOLSTEIN BREED BULLS BY DAIRY PRODUCTIVITY OF THEIR DAUGHTERS

2020 ◽  
Vol 59 ◽  
pp. 26-34
Author(s):  
S. L. Voitenko ◽  
O. V. Sydorenko
Keyword(s):  
Milk Yield ◽  
Phenotypic Variability ◽  
Milk Productivity ◽  
Paternal Origin ◽  
Black And White ◽  
Holstein Breed ◽  
The Third ◽  
Holstein Bulls ◽  
The Difference ◽  
Dairy Breed

The scientific community has shown that the genetic improvement of dairy cattle depends on many genotypic factors, including paternal ancestry and lineage. With this in mind, the purpose of our research was to evaluate the Holstein bulls of black-and-white and red-and-white suits of different lines for the milk productivity of their daughters. The research was carried out on the basis of primary breeding records of 10 breeding herds of Ukrainian Black-and-White Dairy breed, 3 – Ukrainian Red-and-White Dairy breed and one – Ukrainian Red Dairy breed, which are subordinated to NAAS. Cows of the studied breeds has divided into groups according to lineage and paternal origin. Studies have revealed a significant differentiation of milk yield of cows of the first and highest lactation not only of one breed, but also of linear affiliation and paternal origin. It was found that the yield of the first lactation in cows of the Ukrainian Black-and-White Dairy breed varied from 3211 kg (Damir 7100354042) to 7884 kg (Dzhokus 113080315) of milk. Noteworthy are the daughters of Dzhokus 113080315, from which 9143 kg of milk were obtained for higher lactation, Polyarsten 342347941 and Manteno 344222859 – 8248 kg and 8290 kg of milk, respectively. The significant influence of paternal origin on the yield of Ukrainian Black-and-White Dairy breed cows of the first and higher lactation (31.0%; P > 0.999) and 37.3% has been proved; P > 0.999). The influence of genealogical formation on the milk productivity of cows was significant and amounted to 10.8% for the first lactation, higher – 10.2%. Some of the first-born Ukrainian Black-and-White Dairy breed has characterized by high milk productivity, which steadily increased until the third and higher lactation. The yield of cows of the Ukrainian Red-and-White Dairy breed of the first lactation varied from 5414 kg (Dialog 2009) to 6689 kg (Larets 6177), testifying to better homogeneity of herds in terms of milk productivity compared to the Ukrainian Black-and-White dairy breed. The highest yield of the third and highest lactation – 7626 kg, had cows-daughters of the bull Roman 660886883 Starbuck line 352790. The variability of milking cows of Ukrainian Red-and-White Dairy breed of the first and highest lactation by 25.0% and 15.2%, respectively, was due to the influence of the father offspring and to a lesser extent – belonging to the line. A very high (6517–8013 kg) realization potential of milking cows of the Ukrainian Red Dairy breed was established, but it also depended on the paternal origin and linear affiliation. The highest yield of the first lactation were shown by the daughters of the bull Belisar 365235897, Dzhorin 114414759 and Tumpi 112367468, who produced 8013 kg, 7323 kg and 7170 kg of milk, respectively. In cows of this breed it was found that yield increased with increasing serial number of lactation, with the third and higher lactation cows produced more than 8000 kg of milk per lactation, and the daughters of bull Dzhorin 114414759 – more than 9000 kg. The influence of the bull on the milk productivity of the first-born cows of the Ukrainian Red Dairy breed (16.7%; P > 0.999) is almost three times higher than this linear affiliation. Significant phenotypic variability of milk productivity of cows of different breeds of half-sisters by the father is established. The advantage of the daughters of the bull Belisar 365235897 of the Ukrainian Red Dairy breed on milking of the first lactation over the representatives of the Ukrainian Red-and-White Dairy breed was 1932 kg (p < 0.001). The difference in milk yield of the first lactation of the half-sisters by the father, the bull Konbeo 579810507 was 1007 kg (p < 0.01), and Roman 660886883 – 717 kg. Thus, a significant phenotypic variability of milk productivity of cows of different breeds of half-sisters by father was established. At the same time, regardless of the breeder, the cows of the Ukrainian Red Dairy breed were characterized by higher milk yield of the first lactation in comparison with the Ukrainian Red-and-White Dairy breed.

scholarly journals Reserves to increase beef production and their use

2021 ◽  
Vol 37 ◽  
pp. 00005
Author(s):  
Leonid Kibkalo
Keyword(s):  
Body Weight ◽  
Average Daily Gain ◽  
The Body ◽  
Sales Revenue ◽  
The Third ◽  
Bull Calves ◽  
Morphological Composition ◽  
Special Diets ◽  
The Difference ◽  
Daily Gain

The studies were carried out on three groups of superreplacement heifers of the Simmental breed, which were impregnated at the body weight of 360 kg. In the first group there were 32 unimpregnated heifers, in the second – 28 heifers, in the third – 30 heifers. The heifers of the first group after growing at the age of 18 months were taken for meat. 56 heifers gave the crop. The heifers were transferred for reproduction, and the bull-calves were put on cultivation and further fattening. To obtain well-fed animals, special diets were made so that the average daily gain was at least 650-700 g. After calving, the cows of the second group were taken for meat, and the cows of the third group were put on a 3-month fattening, and then taken for meat. The pre-slaughter weight of animals of the first group was 52 kg lower than that of animals of the second group and 104.7 kg lower than that of the third group. The difference was statistically significant at P>0.999. The interior fat mass was higher in the carcasses of cows of the second group by 1.1 and 3.2 kg compared to the animals of the third and first groups. The carcass yield was almost at the same level slightly ahead of the animals of the first group. Their slaughter yield was 60.1%, in other groups – 58.8-59.6%. The meatiness ratio was slightly higher in animals of the first group. The carcass weight of the first-calf heifers of the third group was 27.4 kg higher than that of the second group. Compared to the first group, this figure is higher by 52.6 kg. Specific carcass meat weight of the animals of the third group was 82.75%, which is higher than in the second and first groups by 0.41-0.85%, respectively. Heavy cowbanes weighing 32.6 and 40.4 kg were obtained from the animals. The skin of animals of the third group was 3.5-21.6 dm2 larger in area than of the animals of the second and first groups. Feeder bull-calves (n=27) had a removable mass of 532 kg. Heavy (282.3 kg) carcasses of good morphological composition were obtained from them. The sales revenue from first-calf heifers (second group) was higher than fattened heifers by 10.4%, and in comparison with fattened animals after calving (third group) it was lower by 9.4%. From the sale of one cow with a crop, 2.9 times more profit was received than from the sale of a heifer.

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 The needs and characteristics of feeding dairy cows

2017 ◽  
Vol 19 (79) ◽  
Author(s):  
L. G. Levitskaya
Keyword(s):  
Dairy Cows ◽  
Milk Yield ◽  
Positive Impact ◽  
The Body ◽  
Control Group ◽  
Milk Productivity ◽  
Feed Management ◽  
Feed Costs ◽  
Intensive Course ◽  
Experimental Group

The influence of feed with different contents in them in certain ratios lekarstvennogo and insoluble protein on the body of dairy cows. In particular, digestion in the rumen, digestibility of nutrients of feed, milk productivity and milk quality. Identify the differences in some indicators of digestion in the rumen of cows, the digestion of protein (carrying experience) on the background of the use of the experimental feed. In this grain component was subjected to extrusion and introduced maize, the protein which vikoristannya. Because of this, reduced the solubility of protein from 38% to 29% that is 9%. As a result, extended the time of their digestion in the rumen. So scar microflora sufficiently transformed the ammonia available for absorption of microbial protein, which has a positive impact on the processes of digestion and assimilation of nutrients and contributed to improving milk productivity in cows. The structure of the diets of both groups was identical and included: roughage is 12.5% juicy – 75.0%, concentrated to 12.5%. One fodder unit in the control group had 90.2 g digestible protein in experimental 89.6 g Sharapodinov attitude in control and experimental diets is 0,98. The ratio of mineral substances: CA : P in the control and experience is 1.6 : 1, N : S respectively of 7.3 and 6.9. On a more intensive course of metabolic processes show physiological and biochemical parameters in animals of the experimental group. Namely: reducing the amount of ammonia and the increase in the number of bacteria in the rumen. The composition of basic ration (PR), which included feed management. All experimental animals during the preparatory period received the same diet. Research in accounting period II (experienced) group – experimental mixed fodder in which to reduce the solubility of the protein component of grain (oats, barley, wheat) extrudable and additionally introduced maize grain (15%), the control group received commercial feed. Found that feeding the experimental feed, improved nitrogen metabolism in the organism of cows, heifers, which ultimately increased milk yield by 4.4% (vs. 26.3 to 25.2 kg). The reduction in feed costs and increase milk yield in cows of the experimental group resulted in a reduction of cost of 1 quintal of milk 27.1 UAH. and improve profitability by 2.3% against the control.

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