Effect of in vitro digestibility on phytase activity in the feeding of monogastric animals

Identifier:  TFG:2172

Handle: https://hdl.handle.net/20.500.11797/TFG2172

Authors:  Calvo López-Dávalos, Paula

Abstract:
Phosphorus is an essential mineral for monogastric animals. However, most of the phosphorus in animal chows is present as part of phytic acid molecules, making phosphorus not bioavailable. It is demonstrated that the addition of exogenous phytases from microorganisms to animal chows improves the bioavailability of this mineral. In this work three phytases of different origins were characterized for their possible use in animal chows. The effect of the phytase activity on the upper part of the gastrointestinal tract of monogastric animals was also evaluated through in vitro tests. The results showed the studied phytases are resistant to pepsin. Nevertheless, when the digestibility of the phytases was carried out using matrices of different cereals (wheat, soy, corn and barley) the activity varied depending on the cereal used.