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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.

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Metabolizable Energy of Soybean Meal

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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 StudiesApparent 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


True metabolizable energy with nitrogen correction (TMEn) of dehulled soybean meal from 1987 to 1988

TMEn

____________________

LaboratorySamplesHighLowMean

________________________________________________________

no.-----kcal/kg, 88% DM---

Agriculture Canada292,6922,1872,421

Georgia102,5412,3392,438

________________________________________________________


Design of present study

  • 23 samples of Soybean meal

  • Proximate composition

  • TMEn 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

TMEn = 3157 – 75 (crude fiber)

(Dry matter basis), r2 = 0.61

Example: 88% Dry matter

TMEn = 2778 – 66 (crude fiber)

TMEn = 2778 – 66 (4.8)

TMEn = 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


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