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Metabolizable energy soybean meal
 

Metabolizable energy soybean meal

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Metabolizable energy soybean meal

Metabolizable energy soybean meal

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    Metabolizable energy soybean meal Metabolizable energy soybean meal Presentation Transcript

    • Metabolizable Energy of Soybean Meal Nick Dale and Amy Batal University of Georgia Department of Poultry Science
    • Solvent-extracted dehulled soybean meal
    • Solvent-extracted soybean meal with hulls
    • Soybean meal contaminated with foreign material
    • Classical ME Studies Apparent metabolizable energy of soybean meals (SBM) from 1960 to 1962
      • SBM
      • Laboratory 44% Protein 50% Protein Difference
              • 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
    • True metabolizable energy with nitrogen correction (TME n ) of dehulled soybean meal from 1987 to 1988
      • TME n
      • ____________________
      • Laboratory Samples High Low Mean
      • ________________________________________________________
      • no. -----kcal/kg, 88% DM---
      • Agriculture Canada 29 2,692 2,187 2,421
      • Georgia 10 2,541 2,339 2,438
      • ________________________________________________________
    • Design of present study
      • 23 samples of Soybean meal
      • Proximate composition
      • TME n with 10 SCWL Roosters
    • Variation in crude fat between samples is too low to be useful in prediction equation.
    • Metabolizable energy is negatively correlated with crude fiber.
    • 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)
    • Overprocessed soybean meal
    • Effect of overprocessing on the metabolizable energy of SBM Overprocessing has little effect on the ME of soybean meal 3045 b Overprocessed SBM, 39% PS 3171 a Overprocessed SBM, 53% PS 3140 a Overprocessed SBM, 74% PS 3190 a Overprocessed SBM, 83% PS 3123 a Control SBM, 86% PS TME n (kcal/kg) SBM