RESEARCHES CONCERNING THE COMPARISON OF MILK YIELD BETWEEN CATTLE OF SCHWYZ BREED IMPORTED FROM SWITZERLAND AND BRUNA OF MARAMURES BREED

I. Gîlcă, Valerica Macovei, M. Doliş, Luminiţa Doliş, D. Robu

Abstract
The main aim of this study was to compare the milk performance realized by cattle of Schwyz breed imported from Switzerland and the indigenous breed Bruna of Maramures. The analysis was performed into a farm at the first and second lactations. The imported dairy cattle (Schwyz breed) were compared with contemporaries indigenous breed (Bruna of Maramures) calved in the same period. 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: Y_ij= μ+ H_i+C_j+e_ij. The second lactation records were analyzed according to the following linear model: Y_ijk=μ+ H_i+C_j+ J_k+e_ijk. The difference in milk production between Schwyz and Bruna of Maramures breeds, at first and second lactations, were not statistically significant. The Schwyz breed cattle achieved higher fat, protein and lactose percentage at the first lactation (4.25% and 3.94%, 3.42% and 3.20%, respectively 4.67% and 4.49%) and at the second lactation (4.29% and 4.02%, 3.42% and 3.21%, respectively 4.59% and 4.43%). These differences were statistically highly significant (P<0.01).

Key words: milk yield, cattle breed, Schwyz, Bruna of Maramures