Agrarian
Bulletin
of the Urals

Russian Journal of Agricultural Research

The publication is registered by the Ministry of the Russian Federation
for Affairs of the Press, Television and Radio Broadcasting and Mass Communication Media.
Registration certificate: PI number 77-12831 on May 31, 2002
Subscription index in catalog «Russian Press» - 16356
ISSN 1997 - 4868 (Print)

The Journal is included in the list of the leading peer-reviewed scientific journals and publications, which should be published by the main results of theses for the degree of doctor and Ph.D.
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Journal is included in the list of VAK (from 25.09.2017), No. 291

ISSN 2307-0005 (Online)
Key title: Agrarnyj vestnik Urala (Online)
Abbreviated key title: Agrar. vestn. Urala (Online)

Аграрный вестник Урала № 04 (146) 2016

Животноводство

Лоретц О. Г. ректор, доктор биологических наук, профессор Уральский государственный аграрный университет

Горелик О. В. доктор сельскохозяйственных наук, профессор Уральская государственная академия ветеринарной медицины

Гафнер В. Д. главный зоотехник ООО НП «Искра»

УДК:636.2.082.2.034

INFLUENCE OF ORIGIN ON MILK YIELD OF COWS

 The effect of origin, namely belonging to a line, on milk productivity of cows was studied. The milk yield of cows analyzed and the coefficient of milkiness, the amount of milk fat and quantity of milk protein calculated. In the analyzed farm cattle of black-motley breed of new Ural type with a share of the blood of Holstein cows from 50 to 94 % or more bred. The highest productivity (yield of milk per lactation) had heifers line Vis Ideal that on 980–484 kg were superior to their peers from other groups. The difference amounted to 20.3 % and 9.1 % and was significant at P < 0.01 (line Montvicq Chiftain) and at P < 0.05 (line Reflection Sovering) in favor of cows line Vis Idea. They were superior to their peers from other lines on the mass fraction of fat and protein. Among mature cows, the highest yield of milk were in the group of cows line Sealing Trigun Rokit – 7568 ± 216,51 kg, what on 1232–3096 kg or 19.5–69.2 % was more than cows of the other lines. The difference is significant at P < 0.05 – P < 0.01. However, it should be noted that at the highest yield animals of this line differed low fat content in milk – 3.66 %, that on 0.07–0.30 % lower than in the other groups. In the milk of cows in this group was more protein per 0.06–0.27 %.


Keywords:

black-motley breed cows, line, bulls, milk yield, mass fraction of fat, mass fraction of protein, quantity of milk fat and protein.


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