Nutrient composition and polyphenol profile of annual sunflower leaves (Helianthus annuus L.)

Goal. To study the nutritional value and polyphenolic composition of annual sunflower leaves (Helianthus annuus L.) for their further use as a phytogenic antioxidant additive poultry feed. Methods. The chemical phytoraw material (crude protein, crude fat, fiber, calcium, phosphorus, vitamin E, b-carotene) was evaluated according to generally accepted met­hods. quantitative content individual groups polyphenols determined spectrophotometrically: volume hydroxycinnamic acids — in terms chlorogenic acid, phenolic compounds gallic flavonoids rutin. Results. It established that had high b-carotene (260.2–291.6 µg/g) natural E (37.4%). protein fixed at level 16.2%, fiber 4.2%. A significant amount calcium phosphorus accumulated raw materials 2.03% 0.28%, respectively. total acid 3.15%, 1.60%, rutin equivalent 1.78%. Conclusions. presence confirmed give reasons consider it not only valuable component feed but also source antioxidants.