Investigation of the effect of certain paragenetic factors on fertility traits of bull dams of Simmental breed | Ispitivanje dejstva pojedinih paragenetskih faktora na osobine plodnosti bikovskih majki Simentalske rase
Pantelic, V., Institut za stocarstvo, Beograd - Zemun (Serbia) | Skalicki, Z., Poljoprivredni fakultet, Beograd - Zemun (Serbia) | Latinovic, D., Poljoprivredni fakultet, Beograd - Zemun (Serbia) | Petrovic, M.M., Institut za stocarstvo, Beograd - Zemun (Serbia) | Kucevic, D., Institut za stocarstvo, Beograd - Zemun (Serbia)
Investigation included bull dams of Simmental breed selected on farms of agricultural producers on the territory of the Republic of Serbia. Obtained results indicate the justificaon for investigation of paragenetic factors, since the knowledge of their effect can contribute to more objective evaluation of random effect. Regions had highly significant effect on age at the first conception, duration of service period and interval between calvings, whereas no significant effect on duration of pregnancy was registered. The effect of region of breeding many factors are included and most important one is nutrition. Order of lactation as the second factor investigated in this research had no effect on any of the fertility traits. General average of mean values of least squares for fertility was: for age at the first conception 517.61 days, duration of pregnancy 285.51 days, duration of service period 108.98 days, interval between calving 395.34 days.
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