An additive composition for ruminant feed.

摘要

A granular additive composition for ruminant feed which stably protects the biologically active substance in the rumen of the ruminant and allows it to be effectively digested and absorbed in the digestive organs after the abomasum is provided with consideration of safety and economy. This granular additive composition for ruminant feed comprises a core comprising a biologically active substance and a coating composition coated thereon, said coating composition comprising 90 to 68 % by weight of (A) at least one hydrophobic protecting substance selected from the group consisting of hardened animal and plant oil and fat, an animal and plant fat, and a fatty acid ester, 2 to 10 % by weight of (B) a surface active agent compatible with said hydrophobic protecting substance (A), and 8 to 30 % by weight of (C) talc powder. The granular additive composition simultaneously has excellent protecting property in the rumen of the ruminant and extremely excellent releasability in the digestive organs after the abomasum.