Vecihi AKSAKAL, Mehmet TOPAL, Bahri BAYRAM

Siyah Alaca İneklerde Güç ve Ölü Doğumun Takip Eden Laktasyon Performansına Etkisi

Bu çalışmada, Siyah Alaca ineklerde güç ve ölü doğumun takip eden laktasyon performansına etkisinin belirlenmesi amaçlanmıştır. Bu amaçla, Gümüşhane ili Kelkit ilçesinde faaliyet gösteren özel bir sığırı işletmesinde 2005-2006 yılları arasında doğum yapan 326 Siyah Alaca ineğin 591 doğum ve süt verim kayıtları kullanılmıştır. Çalışmada, ölü doğum ve güç doğumla birlikte, buzağılama yılı ve mevsimi, doğum sırası ve doğum tipi gibi değişkenlerin 305 günlük süt verimi ve sağılan gün sayısına etkisi de araştırılmıştır. Siyah Alaca sığırlarda güç doğum ve ölü doğum ortalaması sırasıyla, %8.7 ve %9.1 olmuştur. Güç doğum yapan ineklerin 305 günlük süt verimi (608.6 kg) ve sağılan gün sayısı (23.1 gün) normal doğum yapanlara göre önemli oranda daha düşüktür (P

The Effects of Dystocia and Stillbirth on Subsequent Lactation Performance in Holstein Dairy Cows

In this study, we aimed to evaluate the effects of difficult birth and stillbirth on following lactation performance in Holstein cows. For this purpose, were used the birth and milk production data of 591 births of 326 Holstein cows in 20052006 in a cattle farm in Kelkit, Gümüşhane. In study, in addition to the effects of difficult birth and stillbirth, the effects of other parameters such as calving year, calving season, birth sequence and birth type on 305 days milk performance and the number of milking days were also investigated. Difficult birth and stillbirth rate were 8.7% and 9.1% in Holstein cows, respectively. 305 days milk performance (608.6 kg) and the number milking days (23.1 days) of cows with difficult birth were significantly lower than those of cows with normal birth. 305 days milk performance and the number milking days of cows with stillbirth were 925.7 kg and 26.5 days, respectively, less than those of cows giving live birth (P

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