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Information × Registration Number 0226U000173, (0123U105340) , R & D reports Title To investigate the biological value of beef for the introduction of sources of essential polyunsaturated fatty acids and Selenium into the feeding diet of cattle. popup.stage_title Встановити оптимальну кількість Селену в раціоні відгодівельних бугайців з додаванням джерел есенціальних жирних кислот. Head Diachenko Oleksandr B., Кандидат сільськогосподарських наук Registration Date 05-01-2026 Organization Institute of Agriculture of the Carpathian Region of the National Academy of Agrarian Sciences of Ukraine popup.description1 To determine the intensity of growth of fattening cattle and the peculiarities of the accumulation of essential polyunsaturated fatty acids of the n-3 and n-6 families and Selenium in their tissues for the introduction of sources of essential fatty acids and selenium preparations into their diet in order to increase their meat productivity and improve the biological value of beef . popup.description2 During the winter housing period, a comparative assessment was conducted of the content of essential polyunsaturated fatty acids (PUFAs) of the ω-3 and ω-6 families and selenium in the diet feeds and their accumulation in the liver and skeletal muscles, as well as their relationship with the average daily weight gains of fattening bulls. It was established that the inclusion of flaxseed oil (as a source of α-linolenic acid), sunflower oil (as a source of linoleic acid), the synthetic compound doxan (as an inhibitor of PUFA biohydrogenation processes in the rumen), and sodium selenite (as a source of selenium) in the diets of fattening bulls caused a significant increase in the content of biologically active polyunsaturated fatty acids of the ω-3 and ω-6 families and selenium in the liver and skeletal muscles, as well as an increase in average daily body weight gains. Thus, a clear relationship was observed between the dietary content of α-linolenic and linoleic acids and selenium and their levels in the tissues of experimental animals, productive traits, and the biological (nutraceutical) value of beef. It was also found that the best results were obtained with the additional supplementation of 2.64 mg of sodium selenite (1.2 mg of selenium) and flaxseed and sunflower oils at amounts of 65 and 35 mL per head per day, respectively. Feeding this diet led to an intensification of average daily body weight gains of fattening bulls by 93.4–98.3 g (8.9–9.3%), an increase in the content of essential polyunsaturated fatty acids of the ω-3 and ω-6 families in the liver by 0.14 and 0.10 g/100 g of raw mass, respectively (77.8–82.4% and 17.5–19.9%), and in skeletal muscles by 0.09–0.11 and 0.07–0.08 g/100 g of raw mass, respectively (90.0–100.0% and 23.3–25.8%). The selenium content increased by 0.19–0.22 and 0.04–0.06 mg/kg, respectively (44.2–47.8% and 22.2–31.6%). As a result, the biological (nutraceutical) value of beef was enhanced. Product Description popup.authors Yosyp F. Rivis Tymchyshyn Iryna M. Vasyl V. Vlizlo popup.nrat_date 2026-01-05 Close