While a traditional diet maximized the growth rate, partial or total replacement of dietary maize with AFS proved economically feasible due to their lower costs and comparable nutrient digestibilities of DM, CP, NDF, and ADF. Partial replacement may prove economically competitive in the current situation of China. (Key Words: Limousin Crossbred Cattle, Alternative Feed Sources, Growing Performance, Nutrient Digestibility, Blood Metabolites)