Evaluation of viability and modes of actions of soybean dietary fibers in promoting the growth performance, nutrient utilization, gut health and immunocompetence of broiler chickens
Animal healthBroiler chickensComplementary nutritional factorsFunctional/BioactivesSoy hullsSoy meal
Parent Project:
This is the first year of this project.
Lead Principal Investigator:
Oluyinka Olukosi, University of Georgia
Co-Principal Investigators:
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Brief Project Summary:
The focus on possible negative effects of SBM non-structural (storage) carbohydrate fractions has overshadowed the potential of the 44% CP SBM as source of structural carbohydrates with potential positive gut health effects. Prebiotics substrates that result from fermentation of structural carbohydrates have been demonstrated to have gut health benefits including mitigating disease challenge. On the other hand, exogenous prebiotics are routinely advocated for use in poultry diets as possible alternative for antibiotics. We have shown in previous work that fiber component of diets is the main driver for the ability of birds to generate prebiotic oligosaccharides in the hindgut during digestion, and this may reduce the need for exogenous prebiotic use. Therefore, the objective of the proposed study is to evaluate the potential of 44% CP SBM to generate prebiotic oligosaccharides in the digestive tract and to assess the gut health benefits that accrue from this.
Information And Results
Project Summary

Project Objectives

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Progress Of Work

Final Project Results

The experiment performed included a total of six studies to show the possible advantage of the inclusion of soyhull in the diets of broiler chickens. Soyhull was included at the rate of 1:9 (soy hull: high protein soybean meal) to generate a low-protein soybean, and this was tested for its effect on growth, amino acid digestibility, immune response, antimicrobial resistance, and microbiota profile in broiler chickens. The results showed that during the first two weeks of life, the chicks receiving the low-protein soybean meal were heavier, had greater feed efficiency, and had greater amino acid digestibility. The birds were also heavier at market weight, but the margin was lower at market age. Similarly, the birds that received the low-protein soybean meal had better immune response and had less damage to the small intestine when they had coccidiosis infection. The positive effect of low-protein soybean meal in broiler diet was also shown in that the birds receiving the diet with the soybean meal had lower levels of specific disease-causing microorganisms and lower antimicrobial drug-resistant in the periods before coccidiosis infection.

Benefit To Soybean Farmers

This study showed promise in using soybean meal with lower protein content. The focus has generally been on using high-protein soybean meal in animal diets. But in certain cases, in some instances a desire to use soybean meal with lower protein content to derive the benefit of soy hull. Consequently, the results from this project show that even in these alternative markets, soybean meal with lower protein content (higher quantities of hull) is relevant and advantageous. We showed that the positive effect was not because of the fiber (because wheat bran inclusion in the high-protein soybean meal did not elicit a similar positive response). Therefore, soyhull has its specific advantage when used strategically in the diet of broiler chickens.

The United Soybean Research Retention policy will display final reports with the project once completed but working files will be purged after three years. And financial information after seven years. All pertinent information is in the final report or if you want more information, please contact the project lead at your state soybean organization or principal investigator listed on the project.