Biofuel co-products as livestock feed - Opportunities and challenges

68Biofuel co-products as livestock feed – Opportunities and challengesprocessed maize (Zinn, Owens and Ware, 2002). A practicalconcern for feedlot nutritionists is whether replacing SFCwith DG affects the NE value of the diet and ultimatelyanimal performance. As noted previously, with diets basedon minimally processed grain, positive effects of adding DGhave been reported for feedlot ADG and G:F. For example,in a summary of 9 experiments with DRC or high-moisturemaize (HMC) as the grain source, G:F responded quadraticallyas wet DG increased in the diet, with a maximalresponse at 30 to 50 percent DG in the DM (Klopfenstein,Erickson and Bremer, 2008).As noted previously, our data with SFC diets (e.g.Figure 1) and other reports in the literature lend credenceto the idea that the feeding value of DG differs dependingon the basal grain processing method. May et al.(2007) detected an interaction between maize processingmethod and inclusion level of sorghum DG (P