The influence of age at [the] first fertilization on performance traits of Simmental cows
2002
Perisic, P. | Skalicki, Z. | Petrovic, M.M. | Mekic, C. | Djedovic-Vidic, R.
Certain reproductive and performance traits of Simmental cows, as well as the demonstration of those traits depending on the effect of age at the first fertilization, were investigated. In regard to the demonstration of performance traits, the effect of age at the first fertilization was most expressive in the first lactation. The greatest negative deviation from the general average in milk yield and yield of milk fat, were established in the first calving cows which were the youngest at fertilization-calving. The increase of age at the first fertilization induced the less negative deviations from the general average. In the second and the third lactation, deviation from the general average depending on the age at the first fertilization, expressed the same trend, but within the limits of random deviations.
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