Disclosed is an application of fulvic acid to a preparation of a feed and/or a preparation for treating or preventing a shrimp or fish infected by bacterial, wherein the feed is dry granules or a fermented feed, and 0.01 grams~500 grams of the fulvic acid is added to each kilogram of the feed, and 0.01 grams~500 grams of the fulvic acid is added to each kilogram of the preparation, and the shrimp or fish can recover from the bacterial infection without a side effect by the feed administration or preparation containing the fulvic acid.一種富里酸在製備用於治療或預防受細菌感染的蝦或魚之飼料及/或製劑的應用,飼料係為乾性顆粒的飼料或經發酵的飼料,且每公斤的飼料中係含有0.01克~500克的富里酸,以及每公斤的製劑中係含有0.01毫克~500毫克的富里酸,受細菌感染的蝦或魚經投予含有富里酸的飼料或製劑後,能夠痊癒且不會有任何副作用之產生。無
