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Soy Protein Evaluation
October 2008

Mercer Soy was evaluated for individual amino acid digestibility using a chick assay. The semi purified diets contained about 43% of the Mercer soy. Test diets were fed to 20 day old chicks for 5 days. Digesta samples were analysed for amino acid analysis. (Nine replications)

Results indicate that the Mercer soy amino acid analysis are within the normal range of values expected for soybean meal. The values suggest that excessive overheating causing maillard reactivity, hence reduced lysine bioavailability did NOT occur during the expeller process.

Apparent Digestibility of Amino Acids - Chick Assay
AMINO ACID MERCER SOY Range 379 378 377 376 375 374
Aspartic Acid 86.99 82-88 85.08 85.21 83.91 82.99 84.84 84.58
Threonine 80.64 77-82 80.13 81.38 79.75 78.15 80.01 89.73
Serine 84.72 82-85 83.94 85.19 83.52 82.38 83.95 89.73
Glutamic Acid 91.00 95-91
89.35 89.51 88.61 88.33 89.36 89.73
Proline 86.01 83-86 85.42 86.02 84.33 84.73 85.30 89.73
Glycine 82.06 80-85 82.80 83.60 82.36 80.79
82.32 89.73
Alanine 85.46 82-86 84.27 85.10 84.35 82.93 84.42 89.73
Cysteine 75.01
74-78 75.46 77.28 75.21 71.77 74.95 89.73
Valine 83.80 81-85 82.35 83.26 82.19 81.84 82.69 89.73
Methionine 88.57 84-89 87.61 87.76 86.97 85.17 87.21 89.73
Isoleucine 86.98 82-87 84.80 85.18 84.45 83.85 85.05 89.73
Leucine 87.05 82-86 84.94 85.44 84.27 83.91 85.12 89.73
Tyrosine 87.75 84-88 86.61 87.01 85.93 84.75 86.41 89.73
Phenylalanine 89.04 84-88 86.41 86.63 85.45 85.35 86.58 89.73
Ornithine 80.63 70-85 79.04 76.61 77.08 53.64 73.40 89.73
Lysine 88.87 82-89 87.35 87.64 86.94 85.71 87.30 89.73
Histidine 88.39 85-89 87.85 87.86 85.71 86.36 87.43 89.73
Arginine 92.72 88-92 90.81 90.89 89.96 90.03 90.88 89.73

Values are apparent digestibility. Values based upon chick assay fed semi purified diets with 43% of ingredient in diet. Results provided by OARDC, Ohio State University, Dr. Mike Lilburn.

Comparison Chart
  48% SBM Mercer Soy Based on $340 SBM $0.40/Lb Fat
Example
% DM 89% 94% $17.00  
% UIP 30% 55%    
% Fat 1% 6% $40.00  

NeL

(DM)

0.88

Mcal/Lb

1.00

Mcal/Lb

~$29.00

Approximate

 
    Total $55 - $75 / Ton  

Lab Report
Sample* Moisture Dry Matter Protein Fat Crude Fiber CP on DM Basis %UIP
Average 4.82 95.19 45.37 6.42 4.35 47.66 55.77
Standard Deviation 0.36 0.36 0.53 0.25 1.08 0.38 0.62
*Sample analysis through April of 2008
 
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