On the other hand, the amount of P necessary
to sustain broilers’ requirements can be provided
with graded levels of inorganic P and/or
phytase (Ven¨al¨ainen et al., 2006; Adeola and Walk,
2013). Higher levels than the physiological threshold
needed for maximum retention are eliminated through
kidneys (Manangi and Coon, 2008), with the consequent
environmental and economic threat.