The objective of this research project was to determine the effect of including Mulberry (Morus alba) in the diet of fattening bulls on the kinetics of rumen nutrient degradation and gas production in vitro. The present investigation was carried out in the ¨La María¨ Campus, in the Rumiology and Nutritional Metabolism Laboratory ¨RUMEN¨, under a completely randomized design with 3 treatments and 6 repetitions, the treatments were; T1: 100% basal diet (concentrate), T2: 80% diet + 20% mulberry, T3: 60% diet + 40% mulberry. The following variables were analyzed; In situ rumen DM degradation, in vitro DM digestibility and in vitro gas production. In the studies carried out in the last decade, it has been possible to verify that the Mulberry has a large percentage and a great variety of the different trace elements such as iron, manganese, cobalt, nickel and zinc.El objetivo de este proyecto de investigación fue determinar el efecto de la inclusión de Morera (Morus alba) en la dieta de toros de engorde sobre la cinética de degradación ruminal de nutrientes y la producción de gas in vitro. La investigación se realizó en el Campus ¨La María¨, Laboratorio de Rumiología y Metabolismo Nutricional ¨RUMEN¨, bajo un diseño completamente al azar con 3 tratamientos y 6 repeticiones, los tratamientos fueron; T1: dieta basal 100% (concentrado), T2: dieta 80% + 20% morera, T3: Dieta 60% + 40% morera. Se analizaron las siguientes variables; Degradación ruminal in situ MS, digestibilidad in vitro de la MS y producción de gas in vitro.