| 摘要 |
PURPOSE:To obtain the title additive having a rate of porosity below a specific value, by-passing a biologically active substance from rumen and absorbing said substance in digestive organs in and after abomasum, comprising a pharmaceutical preparation obtained by dispersing a biologically active substance into a protective matrix such as metallic salt of fatty acid, and coating and protecting. CONSTITUTION:The objective additive which comprises a pharmaceutical preparation obtained by dispersing a biologically active substance (e.g. amino acids, proteins, vitamins or anthelminthic) into a protective matrix consisting of a metallic salt of fatty acid (e.g. calcium salt of 8-22C fatty acid) alone or essentially of the metallic salt of fatty acid, coating and protecting, and having <=15% rate of porosity. The amount of the biologically active substance is preferably 2-40wt.%. |
