Responses of Blood Glucose, Insulin and Cortisol Concentrations to Common Equine Diets

摘要: Two experiments were conducted to determine the response of blood glucose, insulin and cortisol levels four common equine diets. Experiment 1 was designed diurnal variation glucose two glucoregulatory hormones, cortisol, in fasting geldings. No observed either or during 24-h sampling period. However, did exhibit a circadian rhythm, with elevated values morning low evening. 2 investigated insulin, selected amino acids isoenergetic Four 2-yr-old quarter horse geldings used Latin square design. Pelleted diets composed as follows on digestible energy basis: 100% alfalfa (diet A), 50% corn AC), C) 90% 10% oil CO). A single meal fed after an overnight fast. Blood samples taken via jugular catheter from 0800 1700 h. Analysis variance by repeated measures mean area for showed no difference between postprandial peak (P less than 0.01) over prefeeding AC C. differences 0.05) Cortisol meal-related responses any within its expected rhythm.