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LIFETIME PRODUCTION PERFORMANCE OF HOLSTEIN-FRIESIAN COWS

Sonja Jovanovac ; Agricultural University Osijek, Republic of Croatia
Olga Čiča ; Agricultural University Osijek, Republic of Croatia
Elizabeta Kurtek ; Belje, PIK Darda, Hrvatska
Savo Ristić ; Belje, PIK Darda, Hrvatska

Puni tekst: hrvatski, pdf (1 MB) str. 231-238 preuzimanja: 60* citiraj
APA 6th Edition
Jovanovac, S., Čiča, O., Kurtek, E. i Ristić, S. (1990). PRODUKTIVNI VIJEK KRAVA HOLSTEIN-FRIESIAN PASMINE U STAVONUI I BARANJI. Stočarstvo, 44 (7-8), 231-238. Preuzeto s https://hrcak.srce.hr/162017
MLA 8th Edition
Jovanovac, Sonja, et al. "PRODUKTIVNI VIJEK KRAVA HOLSTEIN-FRIESIAN PASMINE U STAVONUI I BARANJI." Stočarstvo, vol. 44, br. 7-8, 1990, str. 231-238. https://hrcak.srce.hr/162017. Citirano 15.04.2021.
Chicago 17th Edition
Jovanovac, Sonja, Olga Čiča, Elizabeta Kurtek i Savo Ristić. "PRODUKTIVNI VIJEK KRAVA HOLSTEIN-FRIESIAN PASMINE U STAVONUI I BARANJI." Stočarstvo 44, br. 7-8 (1990): 231-238. https://hrcak.srce.hr/162017
Harvard
Jovanovac, S., et al. (1990). 'PRODUKTIVNI VIJEK KRAVA HOLSTEIN-FRIESIAN PASMINE U STAVONUI I BARANJI', Stočarstvo, 44(7-8), str. 231-238. Preuzeto s: https://hrcak.srce.hr/162017 (Datum pristupa: 15.04.2021.)
Vancouver
Jovanovac S, Čiča O, Kurtek E, Ristić S. PRODUKTIVNI VIJEK KRAVA HOLSTEIN-FRIESIAN PASMINE U STAVONUI I BARANJI. Stočarstvo [Internet]. 1990 [pristupljeno 15.04.2021.];44(7-8):231-238. Dostupno na: https://hrcak.srce.hr/162017
IEEE
S. Jovanovac, O. Čiča, E. Kurtek i S. Ristić, "PRODUKTIVNI VIJEK KRAVA HOLSTEIN-FRIESIAN PASMINE U STAVONUI I BARANJI", Stočarstvo, vol.44, br. 7-8, str. 231-238, 1990. [Online]. Dostupno na: https://hrcak.srce.hr/162017. [Citirano: 15.04.2021.]

Sažetak
This study included 981 lactation records of 312 daughters of Holstein-Friesian sires from state farms of Slavonija and Baranja. The average age at first calving was 28'9 months and the age at culling was 76.3 months (6.27 years). The average length of production life, number of lactations, total milk yield and total fat yield were 3.89 years, 3.14 lactations,22,335 kg and 813 kg, respectively. The index of exploatation expressing the relative length of production life was 57.28.
The relations between the age at first calving and lifetime performances were negative and statistically insignificant, except for the index of exploatation (r= -0-198**). The correlations between milk production in the first lactation and total milk yield, milk per day of production life and per day of life were positive and significant (0.157*, 0,498**, 0,355**, respectively).
It was evident that with selection for high milk yield in the first lactation, more milk yield can be expected in later life, but not a longer production life.

Hrčak ID: 162017

URI
https://hrcak.srce.hr/162017

[hrvatski]

Posjeta: 161 *