From: Effects of calcium level and source, formic acid, and phytase on phytate degradation and the microbiota in the digestive tract of broiler chickens
Acidification
Ca level
(g/kg dry matter)
Phytase supplementation
(FTU/kg)
CaCO3
5.6
0
1500
8.2
CaCO3 + formic acid
Ca-formate