Supplementation of broiler diets with high levels of microbial protease and phytase enables partial replacement of commercial soybean meal with raw, full‐fat soybean

Summary A 3 × 3 + 1 factorial, involving three levels of protease (0, 15,000 or 30,000 PROT/kg) and three levels of phytase (1,000, 2,000 or 3,000 FYT/kg), was used to evaluate the effect of replacing commercial soybean meal (SBM) with raw, full‐fat soybean (RFSB) at 75 g/kg of diet for broilers. A...

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Bibliographic Details
Published in:Journal of animal physiology and animal nutrition 2018-06, Vol.102 (3), p.755-768
Main Authors: Erdaw, M. M., Perez‐Maldonado, R. A., Iji, P. A.
Format: Article
Language:English
Subjects:
6-Phytase - administration & dosage
Animal Feed - analysis
Animal Nutritional Physiological Phenomena
Animals
antinutritional factors
Birds
Body weight
Body weight gain
Chickens
Conversion ratio
Diet
Diet - veterinary
Dietary Fats - administration & dosage
Dietary Supplements
Digestibility
Dose-Response Relationship, Drug
Feed conversion
Glycine max - chemistry
ileal digestibility
Lipase
Microorganisms
Mucosa
Pancreas
Peptide Hydrolases - administration & dosage
Phytase
Protease
Proteinase
Proteolysis
raw‐full‐fat soybean
Soybeans
Trypsin
Trypsin inhibitors
Villus
Weight reduction
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Summary:Summary A 3 × 3 + 1 factorial, involving three levels of protease (0, 15,000 or 30,000 PROT/kg) and three levels of phytase (1,000, 2,000 or 3,000 FYT/kg), was used to evaluate the effect of replacing commercial soybean meal (SBM) with raw, full‐fat soybean (RFSB) at 75 g/kg of diet for broilers. A control diet was used for comparison. Each treatment was replicated six times, with nine birds per replicate. The concentration of trypsin inhibitors (TIs) in the test diets was approximately 10,193.4 TIU/kg. Regardless of enzyme supplementation, feed intake (FI) and body weight gain (BWG) of birds in the control group were superior to those on the test diets. Birds that received the protease‐free test diets had reduced FI and BWG, but when supplemented with protease, were similar to the control diet in BWG, FI (except 0–35 days) and feed conversion ratio (FCR). When the test diet was supplemented with elevated levels (extradose) of protease and phytase, the BWG was improved during 0–10 days (p = .05) and 0–24 days (p 
ISSN:0931-2439
1439-0396
DOI:10.1111/jpn.12876