Maize was grown on 280 thousand hectares in Slovakia in 2011. Of this area, 86 thousand ha were maize for silage, which represents 0.164 ha per one head of cattle. Maize silage is irreplace­able in nutrition of dairy cows; therefore it is necessary to pay great attention to its quality. The level of dry matter at which forage crop is ensiled has profound effects on silage fermentation because a lack of moisture in dry forages restricts the overall fermentation process. Therefore, the objective of the study was to evaluate the effect of dry matter content on the fer­mentation process of whole crop maize silage treated with various commercial antifungal additives.