Published in Scientific Papers. Series D. Animal Science, Vol. LXVII, Issue 2
Written by Gabriela AMARIȚII, Andra-Sabina NECULAI-VĂLEANU, Bianca MADESCU, Teodor BUGEAC, Vasile MACIUC
The aim of the present study was to highlight the influence of the age of first calving, parity, new-born weight and calving season on the average daily gain. The biological material consists of Holstein calves reared in an intensive system. The data obtained from the measurements at 7 days and 30 days, were statistically processed with the help of Statistics Analysis of Variance and Covariance (SAVC) and SPSS 16.00 computer programs. Significant differences between batches (p<0.05) were observed at 7 days, between calves born by cows having second parity which has a mean with 0.300 g higher of daily gain than those calved by third parity cows. At 30 days, the daily gain mean value has significantly greater differences (p<0.05), been with 0.12 g/day higher in the case of calves born in winter compared to those born in summer and with 0.14 g/day compared to those calved in spring (p<0.01). In the case of calves studied for age at first calving and birth weight, there are no differences between the batches so, these factors not influencing their further development in the case of the considered periods.
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