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- Title
111 Fermentation of Soybean Meal Using a Novel Bacillus Subtilis Isolate to Improve Nutritive Value in Growing Pigs.
- Authors
Lu, Y; Akhtar, N; Zhu, C; Kiarie, E; Li, J
- Abstract
Soybean meal (SBM) fed to pigs contains a variety of antinutritional factors that impair the digestion of protein and utilization of nutrients. In the current study, a commercial SBM was subjected to solid state fermentation (SBM: water, 1:1; inoculum, 1%; temperature, 22-25°C) using a novel <italic>Bacillus subtilis</italic> CP-9 expressing high level of cellulase, xylanase and protease activities. Protein profile of the SBM after 48 h fermentation showed degradation of high molecular weight proteins including antigenic proteins into small-size peptides on sodium dodecyl sulfate polyacrylamide gel electrophoresis. To examine if fermentation altered the nutritive value of SBM, eight barrows (40 ± 2 kg BW) fitted with terminal ileal T-cannula were used. Two semi-purified corn starch–based diets were formulated with unfermented (UF) and fermented (F) SBM as the sole source of AA (min 18% CP, as-fed basis). Pigs were allocated in a two-period cross over design (n = 8) and were fed at 2.8 × maintenance energy requirement. Each period was 9 d; 5 d for adaptation, d 6 and 7 for grab fecal collection and d 8 and 9 for 8 h continuous ileal digesta collection. The diet was considered fixed effect whereas pig and period were considered random effects in statistical analysis. Pigs fed F-SBM had higher (<italic>P</italic><0.05) apparent ileal digestibility (AID) of CP (82.7 <italic>vs.</italic> 79.6%) and ash (46.3 <italic>vs.</italic> 43.0%) compared with pigs fed UF-SBM. There was no treatment effects (<italic>P</italic>> 0.10) on AID of NDF and ATTD of acid detergent fiber (ADF), neutral detergent fiber (NDF) and gross energy (GE). In conclusion, fermentation of SBM by a novel <italic>Bacillus subtilis</italic> CP-9 increased ileal utilization of crude protein and minerals suggesting improved nutritive value in pigs.
- Subjects
SOYBEAN meal as feed; XYLANASES; PROTEINS in animal nutrition; BACILLUS subtilis; SWINE nutrition
- Publication
Journal of Animal Science, 2018, Vol 96, p58
- ISSN
0021-8812
- Publication type
Article
- DOI
10.1093/jas/sky073.109