Efficacy of Soya Protein Concentrates on the Performance and Immunity of Broiler Chickens.

Murad R Ata,Hana Zakaria

doi:10.3389/fvets.2020.00539

Abstract

This study examines the supplementation of soy protein concentrates (SPC) in the diet of straight run broiler chickens and its effect on their immunity and productive performance. Eight hundred Ross 308 mixed chicks were randomly assigned to four varied dietary treatments (200 birds each), four replicates per dietary treatment (50 chicks/replicate). The diets were a control without supplement (T0) or supplemented with T1 (7g), T2 (8g), and T3 (9g)/bird of 5% SPC, which replaced SBM in the basal starter diet at a rate of 5% (W/W). Each bird received a total of 300 g of the starter diet during the first 12 days of rearing and then was fed ad-libitum grower and finisher diets without SPC inclusion for 35 d. On day 35, 2 birds/replicate (8/treatments, 32 birds) were randomly selected and slaughtered for carcass evaluation. Results showed that 9g showed the lowest body weight (P < 0.05) compared to other SPC treatments. SPC addition did not improve performance. 8g had significant (P < 0.05) dressing %. Carcass characteristics were not affected by SPC. Newcastle disease blood titers showed significantly higher protection for 9g and 8g SPC on d 20. Avian Influenza blood titers gave the best results with (9g) at d 30, while Infectious Bursal Disease and Infectious Bronchitis blood titers were not affected by changing dietary levels with SPC. In conclusion, results indicated that supplementing soya protein concentrates to broiler chickens in the starter period has an effect on body weight and dressing %, and that it enhanced immunity against Newcastle and Avian influenza diseases.

Highlights

Soy products, including soybean meal (SBM), are important sources of dietary protein for poultry all over the world [1]
SBM was partially replaced with soy protein concentrate in the basal starter diet at a rate of 5% to obtain a 5% soya protein concentrate (SPC) diet, where each bird received a total of 300 g of the starter diet during the first 12 days, and was fed ad-libitum on grower and finisher diets for 23 days without the inclusion of SPC since young birds are more sensitive to these products and results might be seen more clearly
Results agreed with those cited by [9], who demonstrated that feed intake of chicks that were fed maize-with different levels of a SPC basal diet were not affected

Summary

INTRODUCTION

Soy products, including soybean meal (SBM), are important sources of dietary protein for poultry all over the world [1]. One method of processing, is to use ethanol/water extraction to remove oligosaccharides and part of the soluble pectins, creating a highly nutritive substance—an insoluble fraction of the NSP—which removes the low molecular weight of carbohydrate fractions, resulting in a high-quality SPC product [4]. This trial aimed to study how different levels of SPC affect the performance and immunity of broiler chickens

MATERIALS AND METHODS

RESULTS AND DISCUSSION

ETHICS STATEMENT