Study Regarding the Influence of Activity Period of Cows on Milk Production Indices in the Romanian Black and White Breed
Keywords:
active population, cows, milk production, previous population, Romanian Black and WhiteAbstract
The aim of the study was to assess if there are significant differences of milk production between the Romanian Black and White cow populations activating in different periods of time in Timiş and Caraş-Severin. Studies were carried out on 3764 lactations, of which 1290 lactations from active cows after year 2007 and 2474 lactations from cows that ended their productive life before year 2007. In Timiş County, the milk production per normal lactation of active cows was 4676.4 kg milk, with 183.83 kg butterfat and 150.46 kg protein, being significantly higher than the milk production of previous population by 6-7% (p<0.05). Per total lactation the milk production of active population was 5130.6 kg milk, with 201.87 kg butterfat and 165.70 kg protein, being significantly higher than milk production of the previous population by 4-5% (p<0.05). In Caraş-Severin County, the milk production per normal lactation of active population was 4312.1 kg milk with 170.40 kg butterfat and 145.50 kg protein, while the production per total lactation was 4731.9 kg milk with 188.23 kg butterfat and 159.74 kg protein. These values were not significantly different (p>0.05) compared with the productions of previous population. It was concluded that the rearing conditions in the two counties had an effect on phenotypic expression of milk production.
References
Cziszter, L. T., Dirijarea funcţiei glandei mamare, Eurostampa, Timişoara, 2003
Stanciu, G., Tehnologia creşterii bovinelor, Brumar. Timişoara, 1999
Etgen, W. M., James, R. E., Reaves, P. M., Dairy Cattle Feeding and Management, John Wiley & Sons, Inc., New York, 1987
Bognar, A., Stanciu, G., Cziszter, L. T., Acatincăi, S., Tripon, I., Baul, Simona, Gavojdian, D., Comparative study on the milk production in two Romanian Black and White cow populations from western Romania. Lucrări Ştiinţifice Zootehnie şi Biotehnologii Timişoara, 2009, 42, 221-224
Bognar, A., Stanciu, G., Cziszter, L. T., Acatincăi, S., Tripon, I., Gavojdian, D., Baul, S., Tetileanu, R., Lactation order effects on milk production in Romanian Black and White cows from Timiş County, Lucrări ştiinţifice Zootehnie şi Biotehnologii Timişoara, 2010, 43, 213-216
Bognar, A., Cziszter, L.T, Acatincăi, S., Tripon, I., Gavojdian, D., Baul, S., Erina, S., Longevity and milk production economics in Romanian Black and White cows reared in the South-western Romania, Lucrări ştiinţifice Zootehnie, USAMV Iaşi, 2011, 55(16), 193-198
