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. Archaeal and bacterial amoA, nirS and nosZ genes, N2O-N and CO2-C emissions were also evaluated. The results showed modest short-term effects of chabazite at natural state only on nitrate production rates, which was slightly delayed compared to the unamended soil. On the other hand, the addition of NH4+-enriched chabazite stimulated NH4+-N production, N2O-N emissions, but reduced NO3-N production and abundance of nirS-nosZ genes. DMPP efficiency in reducing nitrification rates was dependent on N addition but not affected by the two typologies of zeolites tested. The outcomes of this study indicated the good compatibility of both natural and NH4+-enriched chabazite zeolite with DMPP. In particular, the application of NH4 +-enriched zeolites with DMPP is recommended to mitigate short-term N losses.

Gross Ammonification and Nitrification Rates in Soil Amended with Natural and NH4-Enriched Chabazite Zeolite and Nitrification Inhibitor DMPP / Ferretti, Giacomo; Galamini, Giulio; Deltedesco, Evi; Gorfer, Markus; Fritz, Jennifer; Faccini, Barbara; Mentler, Axel; Zechmeister-Boltenstern, Sophie; Coltorti, Massimo; Maria Keiblinger, Katharina. - In: APPLIED SCIENCES. - ISSN 2076-3417. - 11:6(2021), pp. 2605-1-2605-20. [10.3390/app11062605]

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

Giulio Galamini;
2021

Abstract

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. Archaeal and bacterial amoA, nirS and nosZ genes, N2O-N and CO2-C emissions were also evaluated. The results showed modest short-term effects of chabazite at natural state only on nitrate production rates, which was slightly delayed compared to the unamended soil. On the other hand, the addition of NH4+-enriched chabazite stimulated NH4+-N production, N2O-N emissions, but reduced NO3-N production and abundance of nirS-nosZ genes. DMPP efficiency in reducing nitrification rates was dependent on N addition but not affected by the two typologies of zeolites tested. The outcomes of this study indicated the good compatibility of both natural and NH4+-enriched chabazite zeolite with DMPP. In particular, the application of NH4 +-enriched zeolites with DMPP is recommended to mitigate short-term N losses.
2021
11
6
2605-1
2605-20
Gross Ammonification and Nitrification Rates in Soil Amended with Natural and NH4-Enriched Chabazite Zeolite and Nitrification Inhibitor DMPP / Ferretti, Giacomo; Galamini, Giulio; Deltedesco, Evi; Gorfer, Markus; Fritz, Jennifer; Faccini, Barbara; Mentler, Axel; Zechmeister-Boltenstern, Sophie; Coltorti, Massimo; Maria Keiblinger, Katharina. - In: APPLIED SCIENCES. - ISSN 2076-3417. - 11:6(2021), pp. 2605-1-2605-20. [10.3390/app11062605]
Ferretti, Giacomo; Galamini, Giulio; Deltedesco, Evi; Gorfer, Markus; Fritz, Jennifer; Faccini, Barbara; Mentler, Axel; Zechmeister-Boltenstern, Sophie; Coltorti, Massimo; Maria Keiblinger, Katharina
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11380/1307708
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