Published in Scientific Papers. Series D. Animal Science, Vol. LXVII, Issue 1
Written by Aleksandra KONSTANDOLO, Valentin FOCSHA, Vasily KURULYUK, Lydia GNATYUK, Radu KARAMAN, Natalya GELETSKY
The article presents the results of studying the impact of live weight on the milk productivity of Holstein cows of various origins after the first completed lactation in three breeding herds. To assess the influence of live weight on the productive traits of cows, the analyzed population in all herds was divided into three groups. Cows with a live weight up to 600 kg (Group I) and from 601-630 kg (Group II) in the herd of SLL "Gomerţ Efrem" positively correlated with milk yield and the amount of milk fat. In SLL "Dastocom", a positive moderate correlation (live weight – 305-day yield) was identified at cows of the first lactation of German selection up to 600 kg (Group I) (r = 0.448), and with an increase in live weight, the correlation coefficient acquired a negative value. In the breeding herd of SLL "Total Gnatiuc", an advantage was found in favor of locally generated cows by 537 and 302 kg for French and Dutch breeds, respectively, with no significant differences observed.
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