1. Metabolizable Energy of Soybean Meal Nick Dale and Amy Batal University of Georgia Department of Poultry Science

2. Solvent-extracted dehulled soybean meal

3. Solvent-extracted soybean meal with hulls

4. Soybean meal contaminated with foreign material

5. Classical ME Studies Apparent metabolizable energy of soybean meals (SBM) from 1960 to 1962 SBM Laboratory44% Protein50% ProteinDifference kcal/kg, 88% DM Cornell 2,195 2,474 11.8 Connecticut 2,200 2,356 6.9 Guelph 2,352 2,542 8.8 Average 2,249 2,457 9.2

6. True metabolizable energy with nitrogen correction (TME n ) of dehulled soybean meal from 1987 to 1988 TME n ____________________ LaboratorySamplesHighLowMean ________________________________________________________ no.-----kcal/kg, 88% DM--- Agriculture Canada292,6922,1872,421 Georgia102,5412,3392,438 ________________________________________________________

7. Design of present study 23 samples of Soybean meal Proximate composition TME n with 10 SCWL Roosters

8. Variation in crude fat between samples is too low to be useful in prediction equation.

9. Metabolizable energy is negatively correlated with crude fiber.

10. Prediction Equation: Calculating ME of soybean meal from crude fiber TME n = 3157 – 75 (crude fiber) (Dry matter basis), r 2 = 0.61 Example: 88% Dry matter TME n = 2778 – 66 (crude fiber) TME n = 2778 – 66 (4.8) TME n = 2461 kcal/kg (1119 kcal/lb)

11. Overprocessed soybean meal

12. Effect of overprocessing on the metabolizable energy of SBM SBM TME n (kcal/kg) Control SBM, 86% PS3123 a Overprocessed SBM, 83% PS3190 a Overprocessed SBM, 74% PS3140 a Overprocessed SBM, 53% PS3171 a Overprocessed SBM, 39% PS3045 b Overprocessing has little effect on the ME of soybean meal