Determining the most proper age for maximum reproductive utilization of bulls from dairy breeds
2003
Tateva, M. | Dimova, V. | Zhekov, Zh. (Eksperimentalna Baza NIGO, Stara Zagora (Bulgaria)) | Gajdarska, V.
The study aimed to determine the most proper age for maximum reproductive utilization of bulls. The object of study were 8 bulls at 24 months old from the Holstein Friesian breed. 2436 ejaculates were assessed. It was found that the maximum age for reproductive utilization was 4-5 years. The number of doses per bull increased with age to 4-5 years. Only through utilization of proven bulls rapid genetic gain could be achieved and the dairy cattle industry recovered.
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