Response of Dairy Cows to Protein Fractions

Abstract

 Proteins are the most important factors affecting microbial growth and milk production at ruminant animals. The continuation of reproduction, growth and milk production in dairy cattle are possible with existence of amino acids that is the monomers of protein in diet. The importance of protein fraction to determine the protein requirements of ruminant animals, the utilization of nitrogenous sources consumed by dairy cattle with feedstuffs and their effects on milk production has been explained in this review. In conclusion; not only the amount of crude protein in diet but also the considering of protein fractions is very important in terms of fulfilling the maintenance and production requirements of dairy cattle.

Keywords

• By-pass protein, Microbial protein, Protein, Cattle, Milk yield

Süt İneklerinin Protein Fraksiyonlarına Tepkileri

Öz

Proteinler, ruminant hayvanlarda mikrobiyal gelişim ve süt üretimini etkileyen en önemli faktörlerdendir. Süt ineklerinde üreme, büyüme ve süt üretiminin sağlanabilmesi, proteinlerin yapıtaşı olan esansiyel amino asitlerin varlığı ile mümkündür. Bu derlemede, ruminant hayvanların protein gereksinimlerinin belirlenmesinde kullanılan protein fraksiyonlarının süt inekleri için önemi, yemlerle alınan azotlu bileşiklerin süt ineklerinde kullanım şekilleri ve bunun süt verimi üzerine etkileri açıklanmıştır. Sonuç olarak; süt ineklerinin beslenmesinde rasyonları oluşturan yemlerde yalnızca ham protein  miktarının değil protein fraksiyonlarının da dikkate alınmasının süt ineklerinin yaşama ve verim payı ihtiyaçlarının karşılanması bakımından önemli olduğu belirlenmiştir.

Anahtar Kelimeler

• By-pass protein, Mikrobiyal protein, Protein, Sığır, Süt verimi

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