Effects of the Fertilizer Added with DMPP on Soil Nitrous Oxide Emissions and Microbial Functional Diversity

Anna Tedeschi, Anna De Marco, Franca Polimeno, Paul Di Tommasi, Giuseppe Maglione, Lucia Ottaiano, Carmen Arena, Vincenzo Magliulo and Luca Vitale
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Anna Tedeschi: Research Division Portici, Institute of Biosciences and Bioresources (IBBR), National Research Council of Italy (CNR), Via Università 133, Portici, 80055 Naples, Italy
Anna De Marco: Department of Pharmacy, University of Naples Federico II, Via D. Montesano, 49, 80131 Naples, Italy
Franca Polimeno: Institute for Animal Production System in Mediterranean Environment (ISPAAM), National Research Council of Italy (CNR), P.le Enrico Ferni 1, Loc. Porto del Granatello, Portici, 80055 Naples, Italy
Paul Di Tommasi: Institute for Agricultural and Forestry Systems in the Mediterranean (ISAFoM), National Research Council of Italy (CNR), P.le Enrico Ferni 1, Loc. Porto del Granatello, Portici, 80055 Naples, Italy
Giuseppe Maglione: Institute for Animal Production System in Mediterranean Environment (ISPAAM), National Research Council of Italy (CNR), P.le Enrico Ferni 1, Loc. Porto del Granatello, Portici, 80055 Naples, Italy
Lucia Ottaiano: Department of Agricultural Science, University of Naples Federico II, via Università, 133, Portici, 80055 Naples, Italy
Carmen Arena: Department of Biology, University of Naples Federico II, Via Cinthia, 80126 Naples, Italy
Vincenzo Magliulo: Institute for Agricultural and Forestry Systems in the Mediterranean (ISAFoM), National Research Council of Italy (CNR), P.le Enrico Ferni 1, Loc. Porto del Granatello, Portici, 80055 Naples, Italy
Luca Vitale: Institute for Agricultural and Forestry Systems in the Mediterranean (ISAFoM), National Research Council of Italy (CNR), P.le Enrico Ferni 1, Loc. Porto del Granatello, Portici, 80055 Naples, Italy

Agriculture, 2020, vol. 11, issue 1, 1-11

Abstract: Agricultural sites contribute extensively to atmospheric emissions of climate-altering gases such as nitrous oxide. Several strategies have been considered to mitigate the impact of agriculture on climate, among these the utilization of fertilizers added with nitrification inhibitors such as DMPP (3,4-dimethylpyrazole phosphate) may represent a suitable solution. DMPP inhibits the growth and activity of ammonia-oxidizing microorganisms, particularly the ammonia-oxidizing bacteria, which are involved in N 2 O production. At present, little information is available on the effects of DMPP on the catabolic diversity of soil microbial community. In this study, the N 2 O emission by soil was performed by using the static chamber technique. The biological determinations of the microbial biomass carbon and the catabolic profile were assessed by measuring the substrate-induced respiration during the entire growing season of a potato crop under two nitrogen treatments: fertilization with and without DMPP. Our results did not show a clear mitigation of N 2 O emission by DMPP, even if a tendency to lower N 2 O fluxes in DMPP plots occurred when soil temperatures were lower than 20 °C. Conversely, DMPP deeply affected the microbial biomass and the catabolism of soil microorganisms, exerting a negative effect when it accumulated in excessive doses in the soil, limiting the growth and the capacity of soil microorganism communities to use different substrates.

Keywords: greenhouse gas emission; catabolic diversity; N fertilization; soil microbial communities (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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