Phytase Supplementation Effects on Amino Acid Digestibility in Broiler Chickens are Influenced by Dietary Calcium Concentrations but not by Acid-Binding Capacity.

ABSTRACT:

Background

Responses to dietary calcium (Ca) and supplemented phytase on prececal amino acid digestibility (pcAAD) in broiler chickens vary among studies. The variation may arise from the dietary acid-binding capacity (ABC) that influences the activity of enzymes in the digestive tract and from microbial activity.

Objective

This study aimed to investigate whether the ABC influences phytase effects on pcAAD and whether microbial activity contributes to this.

Methods

Male Ross 308 broiler chickens were provided 1 of 12 diets in 72 pens (15/pen) from day 16 of age until the end of the experiment on days 21 or 22. In a 3 × 2 × 2-factorial arrangement, the ABC was varied by replacing calcium carbonate (CaCO₃) with Ca-formate or by adding formic acid to CaCO

SUBMITTER: Siegert W 

PROVIDER: S-EPMC8382274 | biostudies-literature | 2021 Aug

REPOSITORIES: biostudies-literature