“Phytate and Phytase:

the value chain of phytate destruction”


8 Giugno 2017
Centro di Ricerche Piccole Specie (CRiPS)

Dipartimento di Scienze Agro-Alimentari
Università di Bologna
Via del Florio 2 - Ozzano dell'Emilia (BO)



 Prof. Dr. Markus Rodehutscord

Determination of precaecal digestibility of phosphorus (pcdP) has been put forward as the approach of choice to characterise the availability of phosphorus (P) from feed raw materials and mixed diets in poultry. Mixed diets usually contain P sources of plant and mineral or animal origin. In plant feed raw materials, pcdP is closely related to gastro-intestinal degradation of phytate (any salt of phytic acid (myo-inositol 1,2,3,4,5,6-hexakis dihydrogen phosphate; InsP6)).


Phytase has traditionally been used as a means to recover phosphorus (P) from phytic acid and thus reduce feed costs by enabling reduction of inorganic phosphate sources. More recent work has indicated that benefits beyond provision of P are achievable if sufficient phytic acid is hydrolysed. Initial work focussed on simply the destruction of phytic acid (IP6), and inverse correlations between animal performance and dietary IP6 levels noted. More recent work has investigated the kinetics of phytase activity in vivo and in vitro and both show that use of industry standard levels of phytase significantly reduce IP6 levels as expected, but increase levels of tetrakisphosphate (IP4) and trisphospate (IP3) in vivo.

Seminario Tecnico

Phytate and Phytase: the value chain of phytate destruction


organizzato dall' Associazione Scientifica di Avicoltura 

Sezione Italiana della World’s Poultry Science Association



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