o:2156 Comparison of fatty acid content of cows milk consuming different grass diets en The aim of this study was to evaluate effects of three dairy cow groups consuming different grass diets (Diet A comprising of 20% grass, Diet B comprising of 50% grass and 100% grazed grass-G) on cow milk proximate and fatty acid (FA) composition. The first principal component (PC1) accounted for 55.1%, and the second (PC2) accounted for 19.5% of the variance. The score values for PC1 and PC2 of the FAs show that milk fat from grass (MF G) was characterized by high C6:0, C8:0 and C14:0 contents. Milk from Diet A (MF A) was characterized by a higher content of C16:0. Milk from Diet B (MF B) was characterized by higher contents of C18:1n-9 and C18:2n-6 than milk from Diet A. The most favorable FA composition was in milk from Diet B, comprising 50% grass. The least favorable FA composition was in milk from Diet A, comprising 20% grass and in milk from 100% grazed grass. However, more testing is needed to bring a conclusion which food for dairy cows is the best. chemical composition, feed composition, milk fatty acids, principal component analysis. 1552099 10.18485/meattech.2022.63.2.6 2023-05-30T12:11:53.094Z 44 yes 46 Nikola Ašanin University of Belgrade, Faculty of Veterinary Medicine Comparison of fatty acid content of cows milk consuming different grass diets Dejana Trbović Institute of Meat Hygiene and Technology Comparison of fatty acid content of cows milk consuming different grass diets person 0000-0001-9357-7789 Jelena Ćirić Institute of meat hygiene and technology Comparison of fatty acid content of cows milk consuming different grass diets person 0000-0002-8118-7676 Milan Ž. Baltić University in Belgrade, Faculty of Veterinary Medicine person Vesna Đorđević Instiute of meat hygiene and technology Comparison of fatty acid content of cows milk consuming different grass diets person 0009-0008-5187-4089 Nenad Parunović Institute of meat hygiene and technology Comparison of fatty acid content of cows milk consuming different grass diets person 0000-0002-8193-4715 Snežana Bulajić Faculty of Veterinary Medicine, University of Belgrade person 2022 application/pdf 332505 https://unilib.phaidrabg.rs/o:2156 no yes 19 70 92000001 71A01 Meat technology 63 63 2 127 133 2022