Maize is an important crop in Czech Republic. Especially as a feed for cattle. Today maize is utilized for biogas production too. High yields and energy per hectare are the most important reasons for its application as animal food. Maize silage constitutes an important part of the winter feeding programme at numerous agricultural enterprises. Each year different maize hybrids are evaluated at the Institute of Animal Science to determine the nutritional parameters and yields at the individual plant components.