| Popis: |
This investigation was done to research the effects of vegetable oils on UFA content in milk fat and performances of high-yielding lactating cows. Sixteen lactating Holstein cows in early lactation were used in a complete randomized design. Experimental diets included: 1) Control (without oil, CON); 2) Diet with 2% soybean oil (SBO); 3) Diet with 2% sunflower oil (SFO); and 4) Diet with 2% canola oil (CLO). Supplementation with vegetable oils tended to decrease DMI, resulting in reduced milk production. Lowest milk production obtained by SBO treatment with 26.44 kg/day compared with CON diet (32.85 kg/day). The cows whose feed had SBO and SFO added, produced milk with the highest content of UFA, as C18:1 content was 26.82 g/100 g milk fat by SFO compared with CON (20.86). Content of C18:2 obtained 3.53 g/100 g milk fat by SFO that was highest compared to other treatments. These results were observed for C18:3 isomers, too. All observations for C18 UFA were significant (P |
