Effect of alkaline mineral complex buffer addition on milk performance, blood parameters, and rumen microbiota in early-lactation dairy cows

Abstract

Early lactation is a critical period for dairy cows, characterized by high milk production demands and a heightened risk of subacute ruminal acidosis, which compromises rumen function, fiber digestion, and overall productivity. While research on buffering agents has predominantly focused on monogastric animals or single-agent applications, the role of composite buffers in early-lactation dairy cows remains underexplored. Our study demonstrated that supplementation with an alkaline mineral complex buffer (AMCB) significantly improved milk yield and quality, increased the relative abundance of protein-degrading bacteria, reduced somatic cell counts, and enhanced liver function. These results provide compelling evidence supporting the strategic application of composite buffering agents to enhance lactational performance and metabolic health in dairy cows.