Gliricidia Hay Replacing Ground Corn and Cottonseed Cake in Total Mixed Rations Silages Based on Spineless Cactus

This study was conducted to evaluate the effects of including gliricidia hay (0, 5, 10, 15, and 20% fresh matter—FM), replacing ground corn and cottonseed cake, on the quality of total mixed rations silages based on spineless cactus. Twenty-five experimental silos were distributed in a completely randomized design experiment (five treatments—five replications). Ash, neutral and acid detergent fiber, and hemicellulose contents increased linearly, whereas the non-fibrous and total carbohydrates decreased (p < 0.05). Crude protein and ether extract contents were quadratically influenced (p < 0.05). The pH values and acetic acid concentrations increased, whereas the lactic acid concentration decreased linearly (p < 0.05). Ammoniacal concentration was influenced quadratically (p < 0.05). Decreasing linear effects were observed on the maximum and minimum temperatures and thermal amplitude (p < 0.05). A quadratic effect was observed on forage losses (p < 0.05). Effluent losses decreased, and dry matter recovery was influenced quadratically (p < 0.05). The inclusion of up to 15.1% gliricidia hay in the production of total mixed ration silages based on spineless cactus preserves adequate standards of chemical composition (15.6% crude protein) and fermentation profile, while decreasing forage losses (7.3% FM) without compromising dry matter recovery and aerobic stability.