The Potential to Alleviate Negative Energy Balance in Holstein Dairy Cows by Modulating Milk Glucose, Plasma Glucose, and Plasma Insuhn through Feeding Yeast Culture and Propionibacteria

摘要

High production dairy cows require increased dietary nutrients to meet energy needs associated with prenatal calf development and increased glucose partitioning for lactation. Because both calf development and mammary functions are largely dependent on glucose for energy requisites, energy for cow maintenance must be derived from other sources, such as protein, and reserves in the form of triglycerides. If mobilization of alternative energy sources is deficient in meeting the cow's maintenance needs,the animal may enter a state of negative energy balance (NEB), resulting in a loss of body condition, milk production capacity, and in severe cases, become ketotic. Supplemental feeding of yeast cultures and Propionibacteria may aid in enhancing ruminai fermentation for the production of propionic acid, a major precursor for gluconeogenesis.