Modulation of ruminal and intestinal fermentation by medicinal plants and zinc from different sources / Zora Váradyová, Dominika Mravčáková, Monika Holodová, Ľubomíra Grešáková, Jana Pisarčíková, Marcin Barszcz, Marcin Taciak, Anna Tuśnio, Svetlana Kišidayová, Klaudia Čobanová KE304