Hüseyin Erdem

Some Environmental Factors Affecting Somatic Cell Count of Holstein Cows

Abstract Erdem, H., Atasever, S. and Kul, E. 2007. Some environmental factors affecting somatic cell count of Holstein cows. J. Appl. Anim. Res., 32: 173–176. This study was conducted to determine some effective factors on somatic cell count (SCC of 123 Holstein cows raised in a private dairy farm in Samsun, Turkey on 70±14, 140±14 and 210±14 days in milk in 5 parities and 4 seasons. It was found that logSCC numbers increased with advanced parities and also in the summer season. Effect of stage of lactation on SCC was not significant (P>0.05) but, correlations between logSCC values of each stage of lactation and overall mean oflogSCC was significantly high (P<0.01). Thus, the results of the present study demonstrate that mastitis risks rise with increasing age or parity and during summer, late spring and early autumn.

Relationships of milkability traits to udder characteristics, milk yield and somatic cell count in Jersey cows.

Abstract Erdem, H., Atasever, S. and Kul, E. 2010. Relationships of milkability traits to udder characteristics, milk yield and somatic cell count in Jersey cows. J. Appl. Anim. Res., 37: 43–47. To determine the relationships between milkability traits (MT) and some characteristics obtained, from udder measurements, udder scores, milk yield traits and somatic cell count (SCC) of milk a total of 195 Jersey cows reared at Karakoy State Farm, Turkey were used. Effects of parity (P), stage of lactation (SL) and milk yield level (MY) were significant on test day milk yield (TDMY). Negative or positive correlations were observed between udder traits and TDMY, milking speed (MS) or milking duration (MD). Besides, positive correlations were observed between MT and MY, and a positive correlation was found between SCC and MD. Thus, determined correlations indicated considerable criteria for breeder selection in dairy cows.