RESEARCHES CONCERNING THE COMPARISON OF MILK YIELD BETWEEN CATTLE OF SCHWYZ BREED IMPORTED FROM SWITZERLAND AND BRUNA OF MARAMURES BREED
I. Gâlca, Valerica Macovei, M. Dolis, Luminita Dolis, 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: Yij= μ+ Hi+Cj+eij. The second lactation records were analyzed according to the following linear model: Yijk=μ+ Hi+Cj+ Jk+eijk. 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
CERCETARI COMPARATIVE PRIVITOARE LA PRODUCTIA DE LAPTE REALIZATA DE VACILE DIN RASA SCHWYZ IMPORTATE DIN ELVETIA SI VACILE DIN RASA BRUNA DE MARAMURES
I. Gâlca, Valerica Macovei, M. Dolis, Luminita Dolis, D. Robu
Rezumat
Scopul principal al acestei lucrari a constat în compararea performantelor în productia de lapte realizate de vacile din rasa Schwyz importate din Elvetia fata de vacile din rasa Bruna de Maramures. Studiul s-a realizat într-o ferma privata, analizându-se productiile înregistrate la prima si a doua lactatie. Comparatia între cele doua rase s-a facut numai între indivizi nascuti în aceiasi perioada, pentru a evita obtinerea unor date eronate. Vacile din ambele rase au beneficiat de conditii similare de întretinere si furajare. Modelul liniar folosit pentru analiza productiei de lapte la prima lactatie a fost Yij= μ+ Hi+Cj+eij. Modelul liniar utilizat pentru analiza productiei de lapte la a doua lactatie a fost Yijk=μ+ Hi+Cj+ Jk+eijk. Diferentele înregistarte la productia de lapte între cele doua rase, la prima si a doua lactatie, au fost nesemnificative din punct de vedere statistic. Laptele produs de vacile din rasa Schwyz, comparativ cu cel obtinut de la vacile din rasa Bruna de Maramures, a avut un continut mai mare în grasime, proteine si lactoza atât la prima fatare (4.25% - 3.94%, 3.42% - 3.20%, respectiv 4.67% - 4.49%), cât si la a doua fatare (4.29% - 4.02%, 3.42% - 3.21%, respectiv 4.59% - 4.43%). Aceste diferente au fost, din punct de vedere statistic, foarte semnificative (P<0.01).
Cuvinte cheie: taurine, rase, Schwyz, Bruna de Maramures, productii de lapte
