Effect of genotype, number of lactation and cow's age at parturition on servis period duration and index of insemination

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...

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Bibliographic Details
Published inBiotehnologija u stocarstvu (Yugoslavia) Vol. 9; no. 3-4
Main Authors Stojic, P. ("Agroekonomik - INI", Beograd - Padinska Skela (Yugoslavia)), Katic, M, Lazarevic, Lj, Latinovic, D, Vajic, Z
Format Journal Article
LanguageSerbian
Published 1993
Subjects
AGE
EDAD
GENOTIPOS
GENOTYPE
LACTACION
LACTATION
PERFORMANCE DE REPRODUCTION
REPRODUCTIVIDAD
VACA
VACHE
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Summary: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.
Bibliography:L10
L53
9500087
ISSN:0353-6289