The aim of the experiment was to compare selected corn hybrids with each other mainly according to their potential milk production. All silage of 4 experimental hybrids (L) showed signifi cantly higher values of NDF (SNDF) digestibility in situ compared to the control hybrid. The SNDF after incubation for 48 hours was on average 33% higher than the SNDF after incubation for 24 hours. Hybrids L3 and L4 had above-average potential milk production in kg per tonne of dry matter per hectare, calculated by the program MILK 2006.