DEVELOPMENT AND PRODUCTIVE QUALITIES REPAIRCALF DEPENDING ON DIFFERENT SEASONS OF THE BIRTH
The results of studies of historical data for the years 2005–2014 the number of cows in the Ukrainian Black Pied dairy breed in EP «Gontarovka» Institute of Animal NAAS of Ukraine to analyze the efficiency of breeding and reproductive ability of heifers born in different seasons of the year. It is established that the telka which are given rise in the winter authentically exceeded on live weight, both at the birth, and at 18–month age of the coevals born in the summer. The age of their fertilization made 16,7 months, розтелення 25,7 months that is one month less, than summer a calf. Dairy efficiency of winter firstcalf heifers in 305 days of a lactation made 5620 kg that more rather summer firstcalf heifers are reliable.
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Fedorovich, V. V. (2015)._ Reproductive ability of cows of dairy breeds on age. Animal husbandry of Ukraine. 1–2, 19–23.
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