Abstract
A related Holstein breed has recently been used to improve domestic dairy cattle and create highly productive herds by purchasing semen from breeding bulls, as well as a large number of heifers and calves of foreign breeding. The purpose of the work is a comparative assessment of the productive qualities of Black Pied and Holstein cows of foreign breeding. Purebred Holstein cows differ from animals of Black Pied breed in milk yield per lactation. Cows of both breeds have fairly high suitability for machine milking. The priority remains with the animals of the Holstein breed of foreign selection. In terms of milking intensity and udder volume, they reliably surpass Black Pied cows at P≤0.05 - P≤0.01, respectively, in terms of indicators. Holstein cows were also the best in the udder index. Correlation coefficients between the productive qualities, as well as between the quantitative indicator of productivity and the qualitative indicators of the suitability of cows for machine milking, were the same or did not differ significantly. A positive correlation was established between milk yield and the duration of the service period from 0.1 to 0.05, depending on the breed.
Highlights
Sustainable supply of the population with high-quality food, including milk, is the main necessity in ensuring the health of the nation and food security of any country [1-7]
Purebred animals of the Holstein breed were used both for crossing with bulls of the Russian Black Pied breed, and were bred among "themselves" to obtain offspring adapted to local conditions [22-27]
The purpose of the work is to study the relationship of economically useful traits of Black Pied and Holstein cows of foreign breeding
Summary
Sustainable supply of the population with high-quality food, including milk, is the main necessity in ensuring the health of the nation and food security of any country [1-7]. The main livestock of dairy cattle belongs to the Russian Black Pied breed, which has separate offsprings, differing in economic and biological characteristics. A related Holstein breed has recently been used to improve the Russian dairy cattle and create highly productive herds by purchasing semen from breeding bulls, a large number of heifers and calves of foreign breeding. A comparative study of the productive qualities of the Russian Black Pied cattle and Holstein animals of foreign selection is relevant and of practical importance
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