@article{article_1120644, title={Investigation of Relationship among Dietary Fatty Acids and Milk Urea Nitrogen and Fertility Problems in Dairy Cattle Farms}, journal={Harran University Journal of the Faculty of Veterinary Medicine}, volume={11}, pages={201–208}, year={2022}, DOI={10.31196/huvfd.1120644}, author={Çavdar, Osman Semih and Kara, Kanber}, keywords={Enerji, fertilite, süt sığırı, süt üre azotu, yem tüketimi, yağ asitleri}, 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.}, number={2}, publisher={Harran Üniversitesi}, organization={Erciyes Üniversitesi Bilimsel Araştırma Projeleri Birimi}