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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书目信息
Zhivotnov"dni Nauki (Bulgaria) | Journal of Animal Science
卷
40
期
1-2
ISSN
0514-7441
页码
pp. 45-47
其它主题
Espermatogenesis; Reproduccion sexual; Insemination artificielle; Recolte de sperme; Recoleccion de semen; Inseminacion artificial; Reproduction sexuee
语言
保加利亚语
注释
Summary (En)
2 tables; 7 ref.
翻译的标题
Ustanovyavane na naj-podkhodyashchata v"zrast za maksimalno polovo natovarvane na bitsite ot mlechnite porodi
类型
Summary
团体作者
Natsionalen Tsent"r za Agrarni Nauki, Sofia (Bulgaria)
2003-08-15
AGRIS AP