Water regime affects soil N2O emission and tomato yield grown under different types of fertilisers

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Luca Vitale (1*), Anna Tedeschi (2), Franca Polimeno (3), Lucia Ottaiano (4), Giuseppe Maglione (5), Carmen Arena (6), Anna De Marco (7), Vincenzo Magliulo (8)

1 National Research Council, Department of Biology, Agriculture and Food Sciences, Institute for Agricultural and Forestry Systems in the Mediterranean, Ercolano (NA), Italy.
2 National Research Council, Department of Biology, Agriculture and Food Sciences, Institute for Agricultural and Forestry Systems in the Mediterranean, Ercolano (NA), Italy.
3 National Research Council, Department of Biology, Agriculture and Food Sciences, Institute for Animal Production System in Mediterranean Environment, Naples, Italy.
4 Department of Agronomy, University of Naples Federico II, Portici (NA), Italy.
5 National Research Council, Department of Biology, Agriculture and Food Sciences, Institute for Animal Production System in Mediterranean Environment, Naples, Italy.
6 Department of Biology, University of Naples Federico II, Naples, Italy.
7 Department of Biology, University of Naples Federico II, Naples, Italy.
8 National Research Council, Department of Biology, Agriculture and Food Sciences, Institute for Agricultural and Forestry Systems in the Mediterranean, Ercolano (NA), Italy.
(*) Corresponding Author:
Luca Vitale
luca.vitale@cnr.it

Abstract

Tomato plants were subjected to three fertilisation treatments (M: mineral fertiliser; DMPP: mineral fertiliser + 3,4- dimethylpyrazole phosphate; OM: NKP + organic animal manure) in combination with two water regimes (100% and 50% evapotranspiration). Plant biomass, fruit production, nitrogen use efficiency (NUE) and N uptake, maximal PSII photochemical efficiency, Fv/Fm and cumulative soil N2O emission were determined. Well-watered OM plants showed higher values of biomass, fruit production, NUE and N uptake than M and DMPP plants; cumulative N2O fluxes were lower in DMPP plots than in M and OM plots. The reduced water supply determined a drop in crop biomass, fruit production, NUE and N uptake, and cumulative N2O fluxes in M and OM treatments that were higher in OM plots, whereas it determined a significant rise in cumulative N2O fluxes in DMPP plots that was lower in absolute term compared to M and OM plots recorded under well-water irrigation. It can be concluded that DMPP added-fertiliser has a good performance in semiarid environment resulting a better nitrogen source compared to conventional and organo-mineral fertilisers under reduced water supply, able to preserve crop yield and to determine soil N2O emissions (as expressed in CO2 eq) not dangerous for global environment.

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How to Cite
Vitale, L., Tedeschi, A., Polimeno, F., Ottaiano, L., Maglione, G., Arena, C., De Marco, A., & Magliulo, V. (2017). Water regime affects soil N2O emission and tomato yield grown under different types of fertilisers. Italian Journal of Agronomy, 13(1), 74-79. https://doi.org/10.4081/ija.2017.989