332 Evaluating the Effects of Replacing Fish Meal with HP 300 on Nursery Pig Performance.

A total of 350 barrows (initial BW = 6.2 ± 0.01 kg) were used in a 21-d growth trial to determine the effects of replacing fish meal with enzymatically treated soybean meal (HP 300) on nursery pig performance. Pigs were weaned at 21-d of age, placed in nursery pens according to BW, and fed a common pelleted starter diet for 3-d, at which time pigs were weighed and pens allotted to 1 of 5 dietary treatments in a complete randomized block design with 5 pigs/pen and 14 pens/treatment. A composite sample of fish meal and HP 300 (Hamlet Protein, Findlay, OH) was collected and analyzed for AA content and proximate analysis to use in diet formulation. Diets were corn soybean-meal based with 10% spray-dried whey and formulated to contain 1.35% standardized ileal digestible (SID) Lys and balanced on an NE basis. The 5 treatments were: 1) a negative control (no specialty protein products); 2) diet with 6% fish meal; 3) diet with 9.1% HP 300 replacing fish meal on a SID Lys basis; 4) diet with 6% HP 300 replacing fish meal on a kg/kg basis; and 5) diet with 15% HP 300 included at the expense of SBM and fish meal. Overall (d 0-21), ADG (P<0.10) was marginally decreased and ADFI (P<0.05) decreased when pigs were fed 15% HP 300 compared with pigs fed the fish meal control. Pigs fed the negative control diet had the poorest G:F (P<0.05), with the other treatments not different from each other. Furthermore, pigs fed the fish meal control diet had increased (P<0.05) final BW compared to pigs fed the negative control, HP 300 replacing fish meal on a SID Lys basis, and 15% HP 300 diet. In conclusion, nursery pigs fed diets with fish meal had improved performance compared with those fed the control diet. a,b,c Means within the same row with different superscripts differ (P<0.05). x,y,z Means within the same row with different superscripts differ (P<0.10). a,b,c Means within the same row with different superscripts differ (P<0.05). x,y,z Means within the same row with different superscripts differ (P<0.10).