FEED ADDITIVE FOR PROMOTING GROWTH, AND PREVENTING AND/OR TREATING RESPIRATORY DISEASES, AND METHOD FOR PREPARING THE SAME

To provide a feed additive that can be added to an animal feed, and exerts beneficial effects of promoting growth, and preventing respiratory diseases.SOLUTION: A method for adding a feed additive includes: (a) process of preparing a fermentation substrate including coffee powder and an auxiliary material; and (b) process of fermenting a fermentation substrate with Aspergillus oryzae to obtain a feed additive. In the fermentation substrate, the content of coffee powder is 45 wt.% to 80 wt.% relative to the overall weight, a carbon-nitrogen ratio of the fermentation substrate is 35 to 65, an auxiliary material includes corn grains, rice husks, flour of soybeans with husks, crushed rice or a combination thereof. The feed additive includes high specific activity digestive enzyme, and has selective bacteriostatic action and a resistive effect to respiratory pathogens.SELECTED DRAWING: Figure 1 【課題】動物飼料に添加することができ、成長を促進し、呼吸器疾患を予防するという有益な効果を発揮する飼料添加物を提供する。【解決手段】コーヒー粉および補助材料を含む発酵基質を用意する工程(a)と、発酵基質をアスペルギルス・オリザエ(Aspergillus oryzae)で発酵させて飼料添加物を得る工程（ｂ）を含む。発酵基質は、その全重量に対し、コーヒー粉の含有量が45重量％～80重量％であり、発酵基質の炭素－窒素比が35～65であり、補助材料がトウモロコシ粒、米殻、殻付き大豆粉、砕米またはそれらの組み合わせを含む。飼料添加物には比活性の高い消化酵素が含まれており、選択的な静菌作用と呼吸器病原菌に対する抵抗性の効果がある。【選択図】図１