[Effect of genotype, number of lactation and cow's age at parturition on servis period duration and index of insemination]
1993
Stojic, P. ("Agroekonomik - INI", Beograd - Padinska Skela (Yugoslavia)) | Katic, M. | Lazarevic, Lj. | Latinovic, D. | Vajic, Z.
This experiments were conducted with 665 East-Friesian multiparous cows with different percentage of Holstein-Friesian genes. According to the percentage of Holstein-Friesian genes, the cows were divided into three groups. It is concluded that genotype had significant influence on milk, milk fat and 45 FCM (4 fat corrected milk) yields. The number of lactation had no effect on any of investigated characteristics, but there was decrease in length of service period and index insemination, as the number of lactation increased. Correlation of age at calving and length of service period was low and positive, as well as that of age at calving and index of insemination.
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