Levels of forage and narasin inclusion on rumen fermentation in feedlot lambs - Sardinha, Lairana Aline; Polizel, Daniel Montanher; Miszura, Alexandre Arantes; Limede, Arnaldo Cintra; Barroso, José Paulo Roman; Martins, André Storti; Oliveira, Gabriela Bagio; Ferreira, Evandro Maia; Eckermann, Nathalia Rubio; Pires, Alexandre Vaz (ASAS-CSAS Annual Meeting and Trade Show, 2019)