ЭлБиб

Молочнохозяйственный вестник, №4 (28), IV кв. 2017

БИОЛОГИЧЕСКИЕ И СЕЛЬСКОХОЗЯЙСТВЕННЫЕ НАУКИ

Influence of the season on the mass fraction of protein

and urea in the milk of cows of black and motley breeds

with different methods of maintenance and milking tech-

nologies

Abramova Natal’ya Ivanovna, Candidate of Science (Agriculture), Chief researcher

e-mail

Federal State Budgetary Institution of Science the Vologda Research Centre of the

Russian Academy of Sciences

Serebrova Irina Sergeevna, Senior researcher

e-mail

Federal State Budgetary Institution of Science the Vologda Research Centre of the

Russian Academy of Sciences

Ivanova Dar’ya Aleksandrovna, Junior researcher

e-mail

Federal State Budgetary Institution of Science the Vologda Research Centre of the

Russian Academy of Sciences

Annotation.

The article presents the results of studies on the urea content and

the mass fraction of protein in the milk of cows with a tethered and loose method of

maintenance, taking into account the technology of milking cows, depending on the

season. The optimum content of urea, protein in cow’s milk is established in summer

period, the greatest one is revealed in winter period with all milking methods and

maintenance technologies.

Keywords:

protein mass fraction, urea, method of maintenance, milking

technology, season.

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