Dr aung kyaw oo

Excellent article,covering in quite simply way all aspects of phytates /phytase /phosphorus. I like it very much. Just some additional words. 1.phytase unit: there is more than one unit name and value.The registration conditions (eg.pH 5,5, temp 37C, 1 min....) are same but other factors (the buffer, colorant, etc in lab conditions) are different. Eg.one unit FTU (Du Pont) is not equall to FYT (DS ...

Apart from the above points you can also add that simple human errors during feed mixing can influence the expected content of phytase. Too much confidence in the mixing equipment may also cause unexpected phytase levels in the final feed. Incorrect storage of the phytase product may also lower the expected phytase activity in the final feed. The phytase products´ particle size and particle size d ...

Just reacting to the original question (do phytases always work in poultry nutrition). Clearly this depends on how you define 'work' i.e. what the expectations you have of the phytase. It would be possible, for example, to manufacture a situation where the efficacy of the added phytase looked very poor e.g. if the diet to which you add the phytase has a high concentration of digestible phosphorus ...

Really very informative data shared.I would like to add some points about Ideal PhytaseBased on PPSP-pH profileImportant to be highly effective in low pH.Important to be effective at broad range of pH (1-5) rangeP-PepsinPepsin ResistantImportant to be resistance to pepsin to avoid the loss of activity in vivo.S-SpeedImportant to have fast working phytase because feed passage time in proximal gut i ...