Sütten Kesim Öncesi Dönemde Farklı Kalitedeki Kaba Yemlerle Beslemenin Holstein Buzağıların Performansı Üzerine Etkileri

Bu çalışmada, Holstein buzağılarda sütten kesim öncesi dönemde iki farklı kalitedeki kaba yem kullanımının (kıyılmış halde kuru yonca otu ve buğday sapı) büyüme, gelişme, yem tüketimi ve yemden yararlanma özellikleri üzerindeki etkileri araştırılmıştır. Bu amaçla toplam 30 baş erkek ve dişi Holstein buzağı cinsiyet ve doğum ağırlıkları göz önünde bulundurularak her birinde 15 baş olmak üzere 2 deneme grubuna dağıtılmıştır. Birinci muamele grubunun % 80 oranında buzağı başlangıç yemi ve kaliteli kaba yem kaynağı olarak % 20 oranında 1-2 cm uzunluğundaki kıyılmış yonca kuru otu, ikinci muamele grubunun ise % 80 oranında buzağı başlangıç yemi ve düşük kaliteli kaba yem kaynağı olarak % 20 oranında 1-2 cm uzunluğundaki kuru buğday sapı kullanılarak hazırlanan toplam yem karışımını (TMR) 8 haftalık sütle besleme periyodu boyunca tüketmeleri sağlanmıştır. Çalışma sonucunda, buzağıların sütten kesim öncesi dönemde buzağı başlangıç yeminin yanında kaliteli kaba yemler ile beslenmesinin yem tüketimini azalttığı (P0.05) tespit edilmiştir. Bu noktadan hareketle, buzağıların performanslarının etkilenmeden daha az yem ile sütten kesilmelerine olanak sağlaması ayrıca yem çevirim kabiliyetlerini artırması (P

Effects of Different Quality Roughage Supply on Performance of Holstein Calves during Preweaning Period

The present study was conducted to investigate the effects of two different quality roughage (wheat straw and alfalfa hay) supplies on live weight gain, growth, feed intake and feed efficiency of Holstein calves during the preweaning period. With this purpose, 30 male and female Holstein calves were divided into two treatment groups (15 calves in each group) based on gender and birth weights. The first group was fed with a total mixed diet containing 80% calf starter and 20% alfalfa hay (chopped in 1-2 cm pieces) as a high quality roughage source and the second group was fed with a total mixed diet containing 80% calf starter and 20% wheat straw (chopped in 1-2 cm pieces) as a low quality roughage source during the preweaning period. The results revealed that feeding with high quality roughage (alfalfa hay) decreased feed intake (P0.05) at the moment of weaning after 8 week preweaning period. Because of lower feed consumption without impairing calf performance and improved feed conversation efficiency, it can be suggested that high quality roughage could be supplied to calves in addition to calf starter feed during the preweaning period but meanwhile economic parameters like feed costs must be taken into account.

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