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Soybean genotype amino acid selection and processing method effects on broiler performance.

S C Wells1, K B Nelson1, M F Costa1

  • 1Center of Excellence for Poultry Science, Division of Agriculture, University of Arkansas System, Fayetteville, AR 72701, United States.

Poultry Science
|February 6, 2026
PubMed
Summary
This summary is machine-generated.

Improved soybean meal (SBM) traits enhance broiler nutrition. Even with less SBM, broilers fed enhanced soybean meal showed comparable performance due to increased digestibility of key amino acids.

Keywords:
Amino acidBreast myopathiesBroiler performanceDigestibilityGenotypeProcessingSoybean

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Area of Science:

  • Animal Science
  • Poultry Nutrition
  • Feed Science

Background:

  • Soybean meal (SBM) is a primary protein source in broiler diets.
  • Optimizing SBM composition is crucial for broiler growth and feed efficiency.
  • Novel soybean processing methods and genetic selection offer potential improvements.

Purpose of the Study:

  • To evaluate the impact of soybean meal with improved traits on Cobb 500 male broiler performance.
  • To compare conventional solvent extraction (ConvSE), conventional extrusion/expeller (ConvEE), and experimental extrusion/expeller (ExpEE) SBM sources.
  • To assess the digestibility of amino acids in different SBM sources.

Main Methods:

  • Two experiments were conducted with Cobb 500 male broilers.
  • Experiment 1: 540 broilers (0-45 days) fed ConvSE, ConvEE, or ExpEE diets.
  • Experiment 2: 240 broilers (0-13 days) fed ConvEE or ExpEE diets to assess direct substitution and amino acid digestibility.

Main Results:

  • No significant differences in 45-day broiler performance or yields were observed among ConvSE, ConvEE, and ExpEE diets in Experiment 1.
  • In Experiment 2, ExpEE diets showed higher digestible Lys, Thr, Ser, Val, Ile, Leu, Arg, Trp, Phe, and Tyr compared to ConvEE.
  • Broilers fed ExpEE diets (lower SBM inclusion) demonstrated similar performance to those on higher SBM inclusion diets.

Conclusions:

  • Soybean meal from soybeans selected for increased amino acid composition (ExpEE) offers improved amino acid digestibility.
  • ExpEE soybean meal can be utilized effectively in broiler diets, potentially reducing inclusion levels without compromising performance.
  • Enhanced SBM traits contribute to efficient broiler nutrition and feed utilization.