RESEARCH CONCERNING THE REPRODUCTION INDECES AT THE ROMANIAN BLACK AND WHITE COWS FROM THE PRIVATE FARMS SITUATED IN THE NORTH-EAST DEVELOPMENT AREA

I. Gîlcă, Valerica Gîlcă, Roxana Mihalache, P. Avram, A. Proboteanu, C. Ginga, Elena Ignat

Abstract
    Researches were done in a population of 300 cows Black and White breed grow into the private exploitation in the North East part of Romania. There were analyzed the following characters: the age of the first calving(V.P.); the calving-interval (C.I.); the inter-lactation period (R.M.); service-period (S.P.). The mean values of breeding indices (VP, RM, CI and SP) highlight an inappropriate state of reproductive activity, with large differences from one holding to another and even within the same holding.

Key words: Cows, Black and White breed, reproduction indices, private farms