COMPARATIVE RESEARCH ON PRODUCTIVE PERFORMANCE OF CATTLE BREEDS RAISED IN NORTHEASTERN ROMANIA (BRUNA AND PINZGAU)
I. Gîlcă, Valerica Gîlcă
Abstract
The main aim of this study was to compare the milk performance realized by cattle of Bruna and Pinzgau breeds. The analysis was performed in two herds at the first and second lactations. Both breeds were kept in the same conditions and with the same feeding. The first lactation records were analyzed according to the following linear model: Yij = µ + Hi + Cj + eij. The second lactation records were analyzed according to the following linear model: Yijk = µ + Hi + Cj + Jk + eijk. The analyses of covariances were processed and calculated the production of fat-protein corrected milk (FPCM) and energy content in milk (ECM) according to the following formulae: FPCM= 0.22M + 7.5F + 15P, respectively ECM = 37.68F + 16.75P + 16.54L. The differences in milk production between Bruna and Pinzgau, at first and second lactations, were not statistically significant. The Bruna breed cattle achieved higher fat, protein and lactose percentage at the first and second lactations. These differences were statistically highly significant (P<0.01). Also, we registered a high value of energy in 1 kg milk of the Bruna breed.
