Black-and-white breed

Influence of bulls on the reproduction indicators of daughters taking into account their productivity

Submitted by red on Wed, 28/10/2020 - 10:32

The main objective of the development of dairy cattle breeding is to increase

the breeding productive characteristics, taking into account the preservation of the

reproductive qualities of animals. The research was conducted on the basis of data

from the breeding plant for black-and-white cattle breeding OOO “Zazerkalie” in the

Vologda region. Bulls-improvers were determined by the complex of selected traits,

taking into account the linear affiliation: Meson 3097402441; Retirement 11720463 of

Economically useful characteristics of Holsteinized black-and-white cows and correlations between them

Submitted by red on Mon, 27/04/2020 - 09:57

The analysis of interdependence between productivity and the A system parameters of a linear exterior evaluation among the daughters of bull-producers of different origin suggests a practical need in exterior evaluation and its interdependence with productivity in a separate herd under specific natural and economic conditions. The revealed high correlation coefficients between the main economically useful characteristics in the offsprings of foreign breeding producers indicate that the selection of any characteristic will have a positive impact on other ones.

Tendencies of dairy cattle breeding development in vologda region and north-west federal district

Submitted by red on Wed, 27/12/2017 - 13:17

The article presents monitoring of the number of farms, livestock and productivity indices of dairy cattle in the Vologda region and in the North-West Federal District within the period of five years.

The causes of the disposal of the animals and the main milk productivity indices of cows having different genotypes depending on the method of housing and technology of milking

Submitted by red on Wed, 27/12/2017 - 13:17

The causes of the disposal of the animals and the main milk productivity indices of cows having different genotypes depending on the method of housing and technology of milking have been analyzed. For all the evaluated periods the animals which were milked with a robotic system in the free stall barn surpassed the cows which were kept on a leash and milked into the pipeline with the help of milking machines. Along with this, in the cows kept in the free stall barn the limb diseases caused culling more often than in other groups of animals under study.

Influence of the season on the maintenance of somatic cells in the milk of black-and-white cows under various milking technologies

Submitted by red on Wed, 27/12/2017 - 13:13

The article presents the results of the season dependence on the somatic cells quantity in black-and-white cow’s milk according to the milking technology.

Milk yield and properties of the udder Black-and-White and Simmental breeds under usage of a robotic milking system

Submitted by red on Wed, 27/12/2017 - 12:57

We analyzed the milk production and the basic properties of udderfresh cows Black-and-White and Simmental breeds using a robotic system of milking. According to different periods of lactation and the basic properties of the udder the cows of Black-and-White breed of dairy productivity trends lead. Therefore, to use a robotic milking system the black-motley breed are more suitable in comparison with the combined productivity of Simmental directions under the purposeful selection.

Immunogenetic markers of economically useful features in black-and-white cattle

Submitted by red on Wed, 27/12/2017 - 12:53

Many researches have revealed the interdependence of erythrocyte antigens with milk productivity and reproductive ability features. However, there are different antigen factors connected with economically useful features in different herds and breeds. The aim of the research is to establish interdependence of economically useful features with blood group antigens. For this purpose, the estimation of immune genetic status in black-and-white cows has been conducted, and antigen-markers of high milk productivity and animal reproductive ability have been identified.

The results of crossbreeding black-and-white cattle and the Holstein breed in the Vologda region

Submitted by red on Wed, 27/12/2017 - 12:47

The article presents the results of crossbreeding black-and-white cattle breed and the Holstein one: population and level of milk production change in holsteinized cattle. It has been found that increasing consanguinity of Holstein breed affects milk yield raising. Moreover, the fat and protein content in milk of different cows genotypes varies slightly. It has been proven that the crossbreeding of black-and-white cattle with the Holstein breed is effective.

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