Investigation of Relationship among Dietary Fatty Acids and Milk Urea Nitrogen and Fertility Problems in Dairy Cattle Farms

Abstract

This aim of this study demonstrated the relationship between the nutritional variables of ration and the fertility parameters in the postpartum period in dairy cattle farms. All dairy cattle farms, which used in present study, were with fertility problems (calving range ≥14 months and artificial insemination number ≥1.8). Ration and milk samples were taken from selected dairy cattle farms. Fertility records from herd registration systems were examined. In the study, milk urea nitrogen (MUN) levels of the milk samples were different between the farms; the lowest was 7.37 mg/dL, and the highest was 32.92 mg/dL (P<0.001). The artificial insemination number was negatively correlated with the monounsaturated fatty acid (MUFA) concentration of total mix ration (TMR) (r=-0.502; P<0.01). The average fatty acid concentrations of the rations at the beginning of lactation were 31.09% of w-6 fatty acids, 1.99% of w-3 fatty acids, and 2.95% of w-9 fatty acids. The MUN concentration of milk was negatively correlated with long-chain fatty acids (LCFA) and linoleic acid concentrations of TMR (P<0.05). As a result, it can be concluded that the energy level should be well adjusted with easily soluble carbohydrate, crude protein, oleic acid, w-3 and w-6 fatty acids, which may be related to fertility in dairy cattle. It was concluded that the target milk production and fertility could be achieved by feeding nutrients to the extent permitted by genetic capacity.

Keywords

• dairy cattle
• energy
• fertilite
• feed intake
• fatty acids
• milk urea nitrogen

Project Number

TYL-2018-8020

Süt Sığırı Çiftliklerinde Rasyon Yağ Asitleri ile Süt Üre Azotu ve Fertilite Sorunları Arasındaki İlişkinin İncelenmesi

Abstract

Bu çalışmanın amacı, süt sığırı işletmelerinde postpartum dönemde rasyonun besinsel değişkenleri ile döl verimi arasındaki ilişkiyi göstermekti. Çalışmada kullanılan süt sığırı işletmelerinin hepsinde infertilite sorunu (buzağılama aralığı ≥14 ay ve suni tohumlama sayısı ≥1.8) vardı. Seçilen süt sığırı işletmelerinde rasyon ve süt örnekleri alındı. Sürü kayıt sistemlerinden fertilite kayıtları incelendi. Çalışmada, süt örneklerinin süt üre nitrojeni (MUN) seviyeleri işletmeler arasında değişkenlik göstermekle birlikte; 7.37 ve 32.92 mg/dL arasındaydı (P<0.001). Suni tohumlama sayısı, total miks rasyonun (TMR) tekli doymamış yağ asiti (MUFA) konsantrasyonu ile negatif korelasyon gösterdi (r=-0.502; P<0.01). Laktasyon başlangıcında infertilite sorunu rasyonların ortalama yağ asidi konsantrasyonları w-6 yağ asitlerinin %31.09'u, w-3 yağ asitlerinin %1.99'u ve w-9 yağ asitlerinin %2.95'i idi. Sütün MUN konsantrasyonu, uzun zincirli yağ asitleri (LCFA) ve TMR'nin linoleik asit konsantrasyonları ile negatif korelasyon gösterdi (P<0.05). Sonuç olarak, süt sığırlarında fertilite ile ilişkili olabilecek kolay çözünür karbonhidrat, ham protein, oleik asit, w-3 ve w-6 yağ asitleri ile enerji seviyesinin iyi ayarlanması gerektiği sonucuna varılabilir. Hedeflenen süt üretimi ve doğurganlığın, genetik kapasitenin izin verdiği ölçüde besinlerle beslenerek sağlanabileceği sonucuna varıldı.

Keywords

• Enerji
• fertilite
• süt sığırı
• süt üre azotu
• yem tüketimi
• yağ asitleri

Supporting Institution

Erciyes Üniversitesi Bilimsel Araştırma Projeleri Birimi

Project Number

TYL-2018-8020

Thanks

Bu çalışmanın gerçekleştirilmesindeki maddi desteği için Erciyes Üniversitesi Bilimsel Araştırma Projeleri Birimi'ne (TYL-2018-8020) teşekkür ederiz.

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