PHENOTYPIC PARAMETERS OF MILK YIELD IN ROMANIAN SPOTTED BREED DAIRY HEIFERS FROM S.C. AGROSEM S.A. PIŞCHIA, TIMIŞ COUNTY
Keywords:
primiparous, milk, fat, protein, selectionAbstract
Milk production and milk composition were studied in a population of 95 Romanian
Spotted breed in the first lactation. Data were taken from the evidence of Timişoara
Center of improvement and reproduction and were statistical work out for
estimation of: arithmetic mean (X), sum of the squares of the values (Sx2
), variance
of a set of sample values (S2
), standard error of the mean (SX) and the coefficient of
variability (CV). The average milk yield of primiparous cows was of 4523.84 ±
86.85kg; average fat yield was of 176.44±3.44kg, while protein mean yield was
147.21±2,98kg. Results obtained shows that, in the farm there is group of
primiparous cows with very good yield of milk, fat and protein that can became
dams. The high potential for milk, fat and protein yield estimated in studied dairy
heifers’ population make up the base for genetic improvement of the Romanian
Spotted breed from the west of the country.
References
Castillo-Juarez H., Oltenacu P.A., Cienfuegos-Rivas E.G., 2002, Genetic
and phenotypic relationships among milk production and composition traits in
primiparous Holstein cows in two different herd environments Livestock
Production Science,78, no.3, 20, pp. 223-231(9).
Chase L. E., 2000, Dairy feeding programs and milk composition, Total
dairy nutrition, 2, no. 2
Dechow, C.D., Rogers, G.W., Cooper J.B., Phelps M.I., Mosholder A.L.,
, Milk, fat, protein, somatic cell score, and days open among Holstein, Brown
Swiss, and their crosses, J. Dairy Sci. 90, pp. 3542–3549.
Heins, B.J., Hansen L.B., Seykora A.J., 2006, Production of pure
Holsteins versus crossbreds of Holstein with Normande, Montbeliarde, and
Scandinavian Red., J. Dairy Sci,. 89:2799–2804.
Kuczaj M, 2002, Milk performance analysis of dairy cows of different
colours sired by Holstein-Frisien red-factors bulls, Animal Husbandry, 5, issue1,
ISSN 1505-0297.
Linn J., Allen D., Nierman P., 1999, Understanding milk protein, Dairy
Initiative Newsletter, 8, issue 2.
