Biological Applications and feed composition containing trace elements premix growing and finishing pigs, feed for growing and finishing pigs

The present invention relates to a feed, and in particular relates to feed compositions and biological applications containing trace elements premix growing and finishing pigs, feed for growing-finishing pigs. The feed composition comprises a biological organic trace elements and yeast metabolites; organic trace elements include copper glycinate, ferrous fumarate, zinc lactate, manganese methionine, selenium yeast, chromium and nicotinic acid. Biological feed composition supplemented with yeast metabolites may facilitate various trace elements exert a synergistic effect, improving the utilization of trace elements; using biological feed composition prepared feed of the present invention can provide significantly improved lean pork, eye muscle area, meat color, marbling score, muscle tenderness, intramuscular fat content and flavor score, can significantly reduce back fat thickness, water loss, drip loss, which can significantly improve carcass and meat quality of pork.