Effect of calving balance on milk production of Slovak spotted dairy cows
2002
Rybanska, M. | Bujko, J. (Slovenska Polnohospodarska Univ., Nitra (Slovak Republic))
A study was carried out to evaluate the milk yield in different seasons of calving in a set of 462 Slovak Spotted dairy cows and their crosses with red Holstein-Friesian cattle (a blood proportion up to 50% and 25%. According to calving date (month), tested cows were divided into 4 groups (seasons): 1/ XII = I = II, 2/ III - IV - V, 3/ VI = VII = VIII, 4/ IX = X - XI. Results from the analysis showed that in terms of milk yield the best time for cows to calve is the 1 st and 2nd season when Slovak Spotted type dairy cows produced 4,600 kg and 4,740 kg of milk, 50% crossbred cows 4,650 kg and 5,015 kg and 25%, crossbred cows 4,537 kg and 4,663 kg of milk, respectively. There was a similar tendency of the changes in fat and protein content, depending on milk production
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