Milk yield traits of Holstein cows raised at a private dairy farm in Boğazlıyan district of Yozgat province

Bu araştırma, Yozgat ili Boğazlıyan ilçesinde özel bir süt işletmesinde yetiştirilen Holştayn ineklerin süt verim özelliklerini belirlemek amacıyla yapılmıştır. Araştırmanın materyalini 192 baş Holştayn ineğin 2007 ve 2010 yılları arasındaki 387 veri kaydı oluşturmuştur. Holştayn ineklerin laktasyon süresi, laktasyon süt verimi, 305 günlük süt verimi ve kuruda kalma süresine ait ortalama değerler sırasıyla, 337.2 gün, 6516.4 kg, 6189 kg ve 64.3 gün olarak bulunmuştur. Laktasyon süresine buzağılama yılı, laktasyon sırası, doğum mevsimi ve buzağılama yaşının etkisi farklı düzeylerde (P

Yozgat ili Boğazlıyan ilçesinde özel bir süt işletmesinde yetiştirilen Holştayn ineklerin süt verim özellikleri

This study was conducted to evaluate milk yield traits of Holstein cows raised at a private dairy farm in Boğazlıyan district of Yozgat province. A total of 387 of 192 Holstein cows raised between 2007 and 2010 were analyzed. Overall means of lactation duration, lactation milk yield, 305-days milk yield, and the length of dry period were 337.2 days, 6516.4 kg, 6189 kg and 64.3 days, respectively. Effects of calving year, lactation number, calving season and calving age on lactation duration were significant at different levels (P<0.001, P<0.05). Effects of calving year and lactation number on lactation milk yield were significant at different levels (P<0.001, P<0.05). The effect of calving age on 305-days milk yield was significant (P<0.05). Furthermore, effects of calving year, lactation number and calving age on dry period were significant at different levels (P<0.001, P<0.05). In conclusion, lactation and 305-days milk yields of Holstein cows were higher than values reported for same breed by some researchers, lactation duration was higher than standard value and length of dry period was similar to the ideal value.

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