Fernando Garcilopez

Hello from Colmenar Viejo, Spain. Enzymes need a certain level of substrate in the feed so that they work like a key-lock complex. If we take look to ruminants, these poligastric animals can digest plenty of various fibrous materials due to their capacity - due to the microflora in rumen- to produce fibrolytic enzymes. Monogastrics, on the other hand, don´t show this capacity - some fermenta ...

Well, interesting, but I am not so optimistic: as I am from the country of limestone - Italy - I well know how large the variation in Ca digestibility can be among various geological origins of limestone, even without mentioning the particle size issue...The other question of giving Phytase a Ca value or not, in my experience when many years ago in Europe we started to give a Ca value to Natuphos ...