Abstract
During the photo-treatment of forage the long-term photo-induced signals (PIS) of the electronic paramagnetic resonance (EPR) are observing (106-107 s). It is demonstrated, that during digesting of the photo-treated meal from the maize seeds the extinguishing of the PIS appears. The process is going during mixing of forage with saliva. The substantiations of alimentary safeness of meat products from birds reared with photo-treated forage, as well as terms of storage of such products, is given.