Foderadditiv til drøvtyggere

摘要

A biologically active substance is kept stably in the rumen and released in the abomasum and its subsequent digestive tract, and can be digested and absorbed with good efficiency by ruminant animals. This is achieved by a feed additive for ruminants prepared by coating a core containing a biologically active substance with a coating composition comprising lecithin, at least one inorganic substance which is stable in neutrality and soluble under acidic conditions, and at least one substance selected from the group consisting of straight-chain or branched-chain saturated or unsaturated, monocarboxylic acids having 14 to 22 carbon atoms or salts thereof, hardened vegetable oils, hardened animal oil and waxes.