RESEARCH REGARDING THE PERFORMANCES OF A NUCLEUS OF IMPORTED FRIESIAN BREED CATTLE EXPLOITED IN THE NORTH-EAST AREA OF ROMANIA

T. Bugeac, Şt. Creangă, Mihaela Ivancia, V. Maciuc, L.D. Dascălu, Aioanei Nadia Mirela

Abstract
The current paper aimed to study the performances of a nucleus of specialized dairy cows belonging to Holstein-Friesian breed, imported from Germany in 2008, in the exploitation conditions from the North-East area of Romania. In order to achieve our goal were gathered milk samples, at each three months, from the whole herd. The obtained data regarding milk quality, duration of lactations and milk quantity were statistically processed. Study was carried out in 2011 on a number of 170 individuals from which were gathered a total of 596 milk samples. Samples were analysed to establish physical-chemical composition using a CombiFoss 6000 analyser. For the characters connected with milk quality, our research enlightened values between 2.40 ÷ 4.62% for fat, 2.38 ÷ 4.65% for protein and 1.78 ÷ 4.79% for casein. As regarding the milk quantitative production the studied herd recorded mean values of 7817.52 kg milk per total lactation and 26.8 kg milk per day for a mean duration of lactation of 288.5 days.

Key words: Holstein Friesian, milk quantity, milk quality, Romania