Calving ease and birth weight of calves of Slovak Simmental cows
2000
Strapak, P. | Vavrisinova, K. | Candrak, J. | Bulla, J. (Slovenska Polnohospodarska Univ., Nitra (Slovak Republic))
The aim was to verify a proposal of calving ease methodology and calf stillbirth rate in the practical conditions of the Slovak Simmental cattle population on behalf of the purpose to make up genetic evaluation of sires and to detect the average birth weight with relation to used sires. We classified 603 heifer calvings and 7,425 cow calvings. At the heifer evaluation we detected 379 unassisted and normal calving, that means 62.7 % from all heifer observations. 41 heifers (23 %) had hard pull scores and in 45 cases veterinarian assistance was necessary. At the evaluation of cow calving ease we determined 1,650 (22.2 %) unassisted calvings and 4,170 easy pull scores (56.2 %), which showed a higher per cent of calvings arranged to categories one and two in comparison with the calving in the heifers (78.4 % for cows). Essentially, also the rate of hard pull from 23 % to 13.4 % and the portion of veterinarian assistance from 7.5 % to 4.2% in the older cow category decreased. By testing selected effects on calving ease as a largest and high significantly the effect of breed and birth weight of calves was investigated.
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