Assessment of persistence components of milk from Simmental cows-heifers of different origin

Seltsov V. I. and Sermyagin A. A.
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Seltsov V. I.: All-Russian Research Institute of Animal Husbandry
Sermyagin A. A.: All-Russian Research Institute of Animal Husbandry

Russian Journal of Agricultural and Socio-Economic Sciences, 2014, vol. 36, issue 12, 3-8

Abstract: It was found that the persistence of milk components positively correlated with the dynamics of daily milk yield per lactation. Mass fraction of fat and protein in milk reached lows in mid-lactation, while the time of launch in protein content were observed maximum values. A similar pattern was noted for the mass fraction of the dry matter, but on the percentage of lactose opposite trend: early and late lactation milk sugar content was less than the decrease peak periods and maximum daily milk yield. By reducing the ratio of fat-protein from calving to the end of lactation was observed simultaneous increase in the number of somatic cells in the milk of cows, heifers. The best estimate of the persistence of daily monitoring of indicators of milk components had a mass fraction of lactose and protein, and fat-protein ratio.

Date: 2014
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