Siyah-Alaca ve Esmer İneklerde CMT Skoru ile Bazı Süt Verim Özellikleri Arasındaki İlişkiler / Relationships Between CMT Scores and Some Milk Yield Traits in Holstein Friesian and Brown Swiss Cows

Abstract

OZET: Bu calisma, Ataturk Universitesi Arastirma ve Uygulama ciftliginde bulunan Siyah-Alaca ve Esmer irk ineklerde CMT skoru ile bazi sut verim ozellikleri arasindaki iliskiyi belirlemek amaciyla yapilmistir. Arastirmada yaslari 4-9 arasinda degisen 50 bas Esmer ve 33 bas Siyah-Alaca inek kullanilmistir. Deneme hayvanlarina CMT uygulanarak CMT skoru ile, laktasyon sayisi ve donemleri arasindaki iliskiler arastirilmistir. Ayrica hayvanlarin toplam, 305 gunluk ve gunluk ortalama sut verimleri belirlenerek CMT skorunun verimlere etkisi incelenmistir. CMT pozitiflik oraninin laktasyonun ilk donemlerinde yuksek oldugu belirlenmistir (P<0.05), ancak faktorlere ait diger alt gruplarda istatistiksel olarak fark bulunamamistir. CMT skoru pozitif olan hayvanlarda negatiflere gore sut verim miktarlari daha dusuk (% 1.54) olmasina ragmen farklilik istatistiksel olarak onemsiz bulunmustur. Benzer calismalarla, mastitisten korunmada CMT tarama sonuclarinin da degerlendirilmesi ve yetistirme surecine dahil edilmesi ile saglikli suru ve saglikli uretim yolunda onemli ilerlemeler saglanacagi sonucuna varilmistir. Anahtar kelimeler: CMT, Sut Verimi, Siyah-Alaca, Esmer Relationships Between CMT Scores and Some Milk Yield Traits in Holstein Friesian and Brown Swiss Cows ABSTRACT: This research was undertaken for the purpose of determining relationships between CMT scores and some milk yield traits of Holstein Friesian and Brown Swiss cows at Ataturk University Research Farm. For the research, 50 heads of Brown Swiss and 33 heads of Holstein Friesian cows aged 4-9 years were used. CMT was applied to the animals and relationships between lactation number and period with CMT score were examined. Moreover; total, 305-day and daily average milk yield records of the animals were determined and the effect of CMT score on these yield traits was investigated. CMT positive percentage was determined higher in cows at the beginning periods of the lactation (P<0.05), but for other milk traits, the differences among groups weren’t found to be significant. Despite the milk production of animals with CMT positive scores was lower (1.54 %) than the negative ones, difference was found to be insignificant statistically. It was concluded that, with more researches, there will be important progress on the way of healthy herds and production with evaluating CMT scores and taking into account it at breeding period for prevention of mastitis. Key words: CMT, Milk Yield, Holstein Friesian, Brown Swiss.