Original scientific paper
A METHOD FOR EVALUATING THE CURRENT REPRODUCTIVE STATUS OF A DAIRY HERDS
Pavo Caput
; Fakultet poljoprivrdnih znanosti, Zagreb, Republika Hrvatska
Milivoj Car
; Fakultet poljoprivrdnih znanosti, Zagreb, Republika Hrvatska
Marijan Posavi
; Fakultet poljoprivrdnih znanosti, Zagreb, Republika Hrvatska
Miroslav Kapš
; Fakultet poljoprivrdnih znanosti, Zagreb, Republika Hrvatska
Zvonko Petrušanec
; "PIK" Đakovo, Republika Hrvatska
Abstract
A method for the evaluating of the curent reproductive status of herds (HRS) by Johnson et. al. (1964.) was applied in 4 dairy herds with 587 cows. The corrected averaged calving intervals (MTR) by farms ranged from 367 to 444 days. The fertility (365/MTR x 100) was between 82.2% and 99.5%. The reproductive status, denoted by the HRS-value, based on reproductive data, obtained on 1.1.1989., within herds ranged from 63.4 to 76.8.
Keywords
Hrčak ID:
162125
URI
Publication date:
28.5.1991.
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