奶牛对农作物秸秆饲料利用效率的差异及其机制OA

Straw resources represent a significant potential source of roughage for dairy cattle in China.Efficient exploitation of these resources can reduce production costs and improve efficiency,thereby alleviating pressure on feed supplies for the dairy industry.In practical production,considerable interindividual variation exists among cows in their ability to utilize straw-based diets,manifesting in measures such as digestibility and feed conversion efficiency.Elucidation of the underlying mechanisms that drive these differences is essential for improving straw utilization and optimizing feed resource use.This review provides a systematic overview of the gastrointestinal and metabolic processes by which dairy cattle utilize crop residues and synthesizes evidence on the biological bases of individual variation in utilization efficiency at multiple levels.The analysis offers theoretical insights and practical recommendations to support the effective incorporation of crop residues into dairy rations.