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

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Presentation on theme: "Metabolizable Energy of Soybean Meal Nick Dale and Amy Batal University of Georgia Department of Poultry Science."— Presentation transcript:

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, Connecticut 2,200 2, Guelph 2,352 2, Average 2,249 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


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