STUDY OF REPRODUCTION INDICES IN COW POPULATIONS BELONGING TO THE TWO SPECIALIZED MILK BREEDS: HOLSTEIN AND SPOTTED WITH ROMANIAN BLACK FROM AGRO-ZOOTECHNICAL FARMS IN NEAM? COUNTY.

This paper presents the results obtained with reference to: average age at first calving (AFC), calving interval (CI), service period (SP) and mammary repose (RM). They were studied 3 farms with populations of cows of the breeds: Holstein and Spotted with Romanian Black (BNR). The studied reproduction indicators recorded the following average values: in the farm "Î.I. Dascălu Sînzîiana", in the Holstein breed, AFC - was 31.03 months, SP - 89.24 days, RM - 55.82 days and CI - 458.27 days, in the farm "Nacu Gheorghe" in the Holstein breed, AFC- was 25.72 months, SP - 87.96 days, RM - 57.58 days and CI - 459.51 days, and in the Spotted Romanian Black breed, AFC - was 27.54 months, SP - 97.22 days, RM - 56.92 days and CI - 401.64 days. The best results regarding the breeding activity were obtained in the farm "Î.I. Râtan Gheorghe", in Spotted with Romanian Black cattle, where AFC - was 27.52 months, SP - 80.04 days, RM -59.43 days, and CI - 393 days. From the analysis of the obtained data, it is revealed the need to reduce the service period, in the farms "Î.I Dascălu Sînzîiana" and "Nacu Gheorghe", at the optimal level of 80 days, because it is the only way to improve the reproduction indices. [ABSTRACT FROM AUTHOR]