Understanding the advantage of using soybean meal instead of competitive protein feedstuffs in low crude protein diets when broiler chickens are exposed to coccidiosis disease challenge and role of pr
Animal healthBroiler chickensSoy meal
Parent Project:
This is the first year of this project.
Lead Principal Investigator:
Oluyinka Olukosi, University of Georgia
Co-Principal Investigators:
Project Code:
Contributing Organization (Checkoff):
Institution Funded:
Brief Project Summary:
Reduction of dietary protein and supplementation with requisite amino acids is proposed to reduce nitrogen excretion to the environment. We previously showed in a USB-funded project that broiler chickens receiving low-protein diets performed better (up to market age) when the diets are based on soybean-meal (SBM) rather than canola-meal or corn-DDGS, which are the leading competitive protein feedstuffs in North America. Therefore, the objective of this proposed research is to further demonstrate superiority of SBM in broiler chickens that are challenged with coccidiosis.
Information And Results
Project Summary

Project Objectives

Project Deliverables

Progress Of Work

Final Project Results

The experiment included six studies to show various mechanisms by which soybean meal provides superior growth performance compared to canola meal or corn-DDGS in reduced-protein diets. Diet protein was reduced by 4% relative to recommended and supplemented with essential and some nonessential amino acids. The 4% reduction in protein involved reducing soybean meal by 10%. Soybean meal inclusion was further reduced by 5% and replaced with 8 or 10% of canola meal or corn-DDGS, and the birds were challenged with coccidiosis on day 15 of age. Growth performance, amino acid digestibility, immune response, protein synthesis and degradation, microbial profile, and antimicrobial resistance were studied. The results showed that the difference in weight was marginal for birds receiving the different protein feedstuffs. However, in the coccidiosis-challenged group, the birds fed soybean meal consistently had greater weight gain and lowest FCR compared to the other groups. The same pattern was observed for amino acid digestibility. A more robust immune response was also observed for the broiler chickens that received the soybean meal diet in the low-protein diets.

Benefit To Soybean Farmers

We showed the advantage of using soybean meal compared to alternative and competitive protein feedstuffs. The results from the studies showed that even when diets are formulated to be lower in protein content beyond the current recommendation, soybean meal still produces superior performance. This was especially evident when birds were challenged with coccidiosis, a common poultry disease. The observation that the immune response was more robust in birds that were fed soybean meal compared to the competitive protein feedstuff is excellent support for the observation of the growth performance effect.

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.