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Fermented Soybean Meal Weaned Pig Diets

Sinn, S.M., W. Gibbons, M. Brown, J. M. DeRouchey and C. L. Levesque1.
May 2015

Research at South Dakota State University has previously shown that standard ileal digestibility (SID) values for fish meal and microbially-converted soybean meal (MCSBM) were similar. This study was designed to evaluate MCSBM as a replacement for FM in weaned pig diets. The experiment involved 184 barrows and 152 gilts weaned at 21d of age. The experimental diets were: 1) Control diet containing corn, soybean meal and whey; 2) Control diet + acidifier; 3) Control diet + fish meal; 4) Fish meal+ acidifier; 5) Control diet+ MCSBM; and 6) MCSBM + acidifier. The fishmeal and MCSBM were included at 7.5 and 5.0%, respectively. The pigs were fed the experimental diets for 21 days and fed a common diet for an additional 14 days. Daily gain and gain:feed from day 0 to 7, 8 to 21, and 22 to 35 were not different between treatments. Daily feed intake tended to be greater (P = 0.09) in pigs fed fish meal compared to the control diet (954 vs. 769g/d, respectively), similarly for fish meal compared with MCSBM + acid (954 vs. 756 g/d) from d 22 to 28. Performance was similar for pigs fed fish meal or MCSBM, thus MCSBM may be an alternative to fish meal in nursery diets; however, it is important to note neither fish meal nor MCSBM provided additional benefit over solvent extracted soybean meal in the control treatment.