The document discusses the application of fermentation technology in animal nutrition, focusing on the preservation and enhancement of animal feed quality. Various studies explore the use of fermentation in improving the nutritional value and safety of feed resources, such as yogurt acid whey, vegetable waste, sugarcane bagasse, and pineapple residue. Researchers also investigate the impact of fermentation on rumen fermentation, mixed silage, essential oils, plant extracts, and co-ensiling techniques. The findings suggest that fermentation technology holds promise for advancing animal nutrition research and improving feed quality and animal performance.