The effect of paragenetic factors on performance traits of standard lactations in Simmental cows
2006
Petrovic, M.D. | Djokovic, R. | Bogosavljevic-Boskovic, S. | Kurcubic, V.
The examination was, namely, made on the effects of the lactation number, calving season and the age at the first fertilization on the performance traits in standard lactations such as milk and milk-fat production, milk-fat content and 4% FCM production. The general mean for milk production was 4322 kg, that for milk-fat production was 157.2 kg and the means for the milk-fat content and 4% FCM production were 3.65% and 4092 kg, respectively. The effect of the lactation group on all the performance traits of standard lactations was very highly significant. The calving season exerted a statistically very highly significant effect on all the traits, except on the milk-fat content. The age at the first fertilization did not statistically significantly affect the performance traits of standard lactation.
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