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

Luca Vitale, Anna Tedeschi, Franca Polimeno, Lucia Ottaiano, Giuseppe Maglione, Carmen Arena, Anna De Marco, Vincenzo Magliulo
  • Luca Vitale
    National Research Council (CNR), Department of Biology, Agriculture and Food Sciences (DiSBA), Institute for Agricultural and Forestry Systems in the Mediterranean (ISAFoM), Ercolano (NA), Italy | luca.vitale@cnr.it
  • Anna Tedeschi
    National Research Council (CNR), Department of Biology, Agriculture and Food Sciences (DiSBA), Institute for Agricultural and Forestry Systems in the Mediterranean (ISAFoM), Ercolano (NA), Italy
  • Franca Polimeno
    National Research Council (CNR), Department of Biology, Agriculture and Food Sciences (DiSBA), Institute for Animal Production System in Mediterranean Environment (ISPAAM), Naples, Italy
  • Lucia Ottaiano
    Department of Agronomy, University of Naples Federico II, Portici (NA), Italy
  • Giuseppe Maglione
    National Research Council (CNR), Department of Biology, Agriculture and Food Sciences (DiSBA), Institute for Animal Production System in Mediterranean Environment (ISPAAM), Naples, Italy
  • Carmen Arena
    Department of Biology, University of Naples Federico II, Naples, Italy
  • Anna De Marco
    Department of Biology, University of Naples Federico II, Naples, Italy
  • Vincenzo Magliulo
    National Research Council (CNR), Department of Biology, Agriculture and Food Sciences (DiSBA), Institute for Agricultural and Forestry Systems in the Mediterranean (ISAFoM), Ercolano (NA), Italy

Abstract

Tomato plants were subjected to three fertilization treatments (M: mineral fertilizer; DMPP: mineral fertilizer + 3,4-dimethylpyrazole phosphate; OM: NKP + organic animal manure) in combination with two water regimes (100% and 50% Evapotranspiration, ET). 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-fertilizer has a good performance in semi-arid environment resulting a better nitrogen source compared to conventional and organo-mineral fertilizers 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.

Keywords

Fertilizer; Plant growth; Water regime; N2O emission; Global environment; Tomato

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Submitted: 2017-04-13 14:06:38
Published: 2017-10-30 16:47:30
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Copyright (c) 2017 Luca Vitale, Anna Tedeschi, Franca Polimeno, Lucia Ottaiano, Giuseppe Maglione, Carmen Arena, Anna De Marco, Vincenzo Magliulo

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