287 The Effect of Greater Inclusion Levels of Ddgs with or without a Syncra SWI in Swine Grower-Finisher Diets on Performance and Economics

Abstract

Abstract To evaluate the effect of greater inclusion levels of DDGS with or without a Syncra SWI (SWI; bacillus plus protease; IFF, USA) in swine grower-finisher diets, a trial was conducted consisting of 528 pigs across 6 treatments with 8 replicates consisting of 11 pigs each where weights were balanced at the start of the trial. Inclusion levels of DDGS were 0%, 15%, and 30% all containing phytase and carbohydrase enzymes. Each inclusion level was split to include or not include SWI. At the end of the trial, slaughter weights were measured. While no significant differences were detected, the heaviest slaughter weights were observed in the 0% DDGS diet, 30% DDGS diet with SWI and the 0% DDGS diet with SWI (115.28, 115.16, and 115.15 kg, respectively). For total body weight gain, there were no significant differences between both 0% DDGS diets, the 15% DDGS diet without SWI, and both 30% diets. However, the 15% diet with SWI was significantly lighter than both 0% DDGS diets and the 30% DDGS with SWI diet (P = 0.01, 0.04, 0.008 respectively). Similarly, no significant differences were found between both of the 0% DDGS diets, the 15% DDGS diet without SWI, or both 30% DDGS diets on average daily gain. A significant difference was detected between the 15% DDGS with SWI and both 0% DDGS diets and the 30% DDGS diet with SWI (P = 0.002, 0.0003, and 0.001, respectively) on average daily gain. The lightest cold carcass weight was observed in pigs fed the 15% DDGS diet with SWI, which was significantly (P < 0.05) different from all other diets, while the heaviest cold carcass weight was observed in pigs fed the 0% DDGS diet with SWI (87.22 kg) followed by the 30% DDGS diet with SWI (86.53 kg) but were not significantly different. While there were no significant differences detected in the economics of the trial, the feed with the greatest cost was the 0% DDGS diet with SWI ($299.98) while the least cost was demonstrated in the 30% DDGS with SWI diet ($288.80). The diet that generated the highest revenue was the 0% DDGS diet with SWI ($124.89) followed by the 30% DDGS diet with SWI ($123.94) while the least revenue was seen in the 15% DDGS diet with SWI ($119.65). Margin over feed cost was greatest in the 15% DDGS diet ($66.87) and the 30% DDGS diet with SWI ($66.16) and the least MOFC was seen in the 0% DDGS diet. While no significant differences were detected in performance between the 0% DDGS diets and the 30% DDGS diets, these data shows there is a potential benefit to feeding greater inclusion DDGS diet if an SWI is added.