FIELD: feed production. SUBSTANCE: method involves producing feed additive from crown-bearing sawwort grass, which had been gathered at vegetative or mass bud-formation stage; grinding grass; exposing to triple extraction with ethanol; filtering and boiling down obtained extract; clarifying water residue by filtering through mineral sorbent; treating clarified extract with hexane or petroleum ether; boiling down and drying. EFFECT: increased biological value of produced feed additive, increased bird retention, stable daily weight gain and reduced feed dosage. 3 cl, 5 tbl
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