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

Metabolizable energy soybean meal

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Page 1: Metabolizable energy soybean meal

Metabolizable Energy of Soybean Meal

Nick Dale and Amy Batal

University of Georgia

Department of Poultry Science

Page 2: Metabolizable energy soybean meal

Solvent-extracted dehulled soybean meal

Page 3: Metabolizable energy soybean meal

Solvent-extracted soybean meal with hulls

Page 4: Metabolizable energy soybean meal

Soybean meal contaminated with foreign material

Page 5: Metabolizable energy soybean meal

Classical ME StudiesApparent 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

Page 6: Metabolizable energy soybean meal

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

TMEn

____________________

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

________________________________________________________

Page 7: Metabolizable energy soybean meal

Design of present study

• 23 samples of Soybean meal

• Proximate composition

• TMEn with 10 SCWL Roosters

Page 8: Metabolizable energy soybean meal

Correlation between Crude Fat and TMEn of soybean meal

r2 = 0.07

2000

2200

2400

2600

2800

3000

3200

0.6 0.7 0.7 0.9 1.1 1.2 1.5 1.5 1.6 1.8 2.0 2.8

Crude Fat (%)

TM

E

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

Page 9: Metabolizable energy soybean meal

Correlation between Crude Fiber and TME in soybean meal

r2 = 0.61

2000

2200

2400

2600

2800

3000

3200

1.3 3.7 3.9 3.9 4.0 4.5 5.4 6.1 6.6 6.7 7.2 8.3

Crude Fiber (%)

TM

E

Metabolizable energy is negatively correlated with crude fiber.

Page 10: Metabolizable energy soybean meal

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)

Page 11: Metabolizable energy soybean meal

Overprocessed soybean meal

Page 12: Metabolizable energy soybean meal

Effect of overprocessing on the metabolizable energy of SBM

3045bOverprocessed SBM, 39% PS

3171aOverprocessed SBM, 53% PS

3140aOverprocessed SBM, 74% PS

3190aOverprocessed SBM, 83% PS

3123aControl SBM, 86% PS

TMEn

(kcal/kg)SBM

Overprocessing has little effect on the ME of soybean meal