RESULTS REGARDING THE STUDY OF REPRODUCTION INDEXES AT ROMANIAN BLACK PIED COW POPULATION BELONGING TO A.G.C.T.R.
V. Ujică, V. Maciuc, C.E. Nistor, V. Băcilă, I. Nistor, S. Olaru
On a population of 4487 BNR cows, from 17 counties belonging to A.G.C.T.R. (General Association of Romanian Cattle Breeders) were evaluated the main reproductive indicators on the basis of data from official control in farms.
Were evaluated the following indicators: age at first calving (VP), number of artificial inseminations for one gestation, duration of gestation, service-period, mammary repose and calving interval (CI).
From analysis of mean values could be observed that mean age at first calving was in 29.57 days, analysed population having precocity under the standard of Friesian breed. Number of inseminations for one gestation was 1.83 i.a., at the farms level being recorded an efficient management of frozen seminal material.
Reproduction indicators: CI, SP, RM and DG, had mean values which prove that reproduction function was well technically managed, in each year obtaining one calf from each cow.
Key words: reproduction indexes, cows, management, technologic factors