• 30/06/21 09:48

    Gross Ammonification and Nitrification Rates in Soil Amended with Natural and NH4-Enriched Chabazite Zeolite and Nitrification Inhibitor DMPP

    by Giacomo Ferretti, Giulio Galamini, Evi Deltedesco, Markus Gorfer, Jennifer Fritz, Barbara Faccini, Axel Mentler, Sophie Zechmeister-Boltenstern, Massimo Coltorti and Katharina Maria Keiblinger


    Using zeolite-rich tuffs for improving soil properties and crop N-use efficiency is becoming popular. However, the mechanistic understanding of their influence on soil N-processes is still poor. This paper aims to shed new light on how natural and NH4+-enriched chabazite zeolites alter short-term N-ammonification and nitrification rates with and without the use of nitrification inhibitor (DMPP). We employed the 15N pool dilution technique to determine short-term gross rates of ammonification and nitrification in a silty-clay soil amended with two typologies of chabazite-rich tuff: (1) at natural state and (2) enriched with NH4+-N from an animal slurry.