Yıl, laktasyon sırası ve buzağılama mevsiminin holstein ineklerin süt verim özelliklerine etkileri
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Date
1999
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Uludağ Üniversitesi
Abstract
Bu çalışma, Uludağ Üniversitesi Veteriner Fakültesi koşullarında yetiştirilen Holstein ineklerin, süt verim özellikleri düzeyinin belirlenmesi ve bu özelliklere etki eden çevre faktörlerinin incelenmesi amacıyla yapıldı. Araştırmada, Holstein ineklerin laktasyon süresi, gerçek süt verimi, 305 gün süt verimi ve kuruda kalma süresi minimum kareler ortalamaları sırasıyla 324.5 gün, 5118 kg, 4926 kg ve 66.4 gün hesaplandı. Yılların, gerçek süt verimi, 305 gün süt verimi ve kuruda kalma süresine etkisi önemli bulundu (P<0.001). Gerçek ve 305 gün süt verimlerinin, 9 yıllık sürede, sırasıyla 17 65 ve 1813 kg arttığı saptandı. Laktasyon sırasının etkisi yalnızca 305 gün süt veriminde istatistiki önemde bulundu (P<0.001). Buzağılama mevsiminin, 305 gün süt verimini etkilediği (P<0.05), en yüksek ve en düşük süt veriminin sırasıyla ilkbahar ve sonbaharda buzağılayan ineklere ait olduğu saptandı.
This study was carried out to investigate the !levels of milk yield traits and the effects of environmental factors on this yield traits of the Holstein cows raising under the conditions of the University of Uludag, · Faculty of Veterinary Medicine Farm.In this study, least square means of lactation duration, actual milk yield, 305-day milk yield and dry period of Holstein cattle were found as 324.5 day, 5118 kg, 4926 kg and 66.4 day, respectively. The effect of years on actual milk yield, 305-day milk yield and dry period was found significant (P<0. 001). Actual milk yield and 305-day milk yield were increased to 1765 and 1813 kg in nine years period, respectively. Lactation number affected only 305-day milk yield (P<0 .001). Calving season had significant effect on 305 day milk yield (P<0.05), the highest and lowest milk yield were found in the spring and autumn, respectively.
This study was carried out to investigate the !levels of milk yield traits and the effects of environmental factors on this yield traits of the Holstein cows raising under the conditions of the University of Uludag, · Faculty of Veterinary Medicine Farm.In this study, least square means of lactation duration, actual milk yield, 305-day milk yield and dry period of Holstein cattle were found as 324.5 day, 5118 kg, 4926 kg and 66.4 day, respectively. The effect of years on actual milk yield, 305-day milk yield and dry period was found significant (P<0. 001). Actual milk yield and 305-day milk yield were increased to 1765 and 1813 kg in nine years period, respectively. Lactation number affected only 305-day milk yield (P<0 .001). Calving season had significant effect on 305 day milk yield (P<0.05), the highest and lowest milk yield were found in the spring and autumn, respectively.
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Keywords
İnek, Holstein, Süt verimi, Çevre faktörleri, Cow, Holstein, Milk yield, Environmentalfactors
Citation
Balcı, F. (1999). ''Yıl, laktasyon sırası ve buzağılama mevsiminin holstein ineklerin süt verim özelliklerine etkileri''. Uludağ Üniversitesi Veteriner Fakültesi Dergisi, 18(1-2), 223-237.