Soil fluxes of nitrous oxide measured in the demonstration site in Foggia

Nitrous oxide (N2O) fluxes from soil measured in demonstration site in Foggia up to 31/10/2022

Graphs show the cumulated fluxes of N2O from soil, in the various phases of the crop rotation in the Conventional and the Efficient Cropping Systems. Carbon dioxide fluxes are measured by mean of 8 automated chambers, 4 in the Conventional Cropping System (CCS), and 4 in the Efficient Cropping System (ECS). Values in the graphs are the cumulated value of the daily average of the measurements made in the CCS and ECS systems, respectively.

Data are under validation, so they are not to be considered as final.

CCS – Conventional Cropping System

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Bare soil

Start: 28/11/2019
End: 30/04/2020
Duration: 154 days
Cumulated flux: 21.17 ± 0.98 mg N2O m-2
Average daily flux: 0.14 mg N2O m-2

Sunflower

Sowing: 30/04/2020
Harvest: 17/09/2020
Duration: 140 days
Cumulated flux: 43.34 ± 1.85 mg N2O m-2
Average daily flux: 0.31 mg N2O m-2
Yield: 0.4 t ha-1 s.s.
Total biomass: 0.6 t ha-1 s.s.
Fertilisation: 56 kg ha-1 N
Irrigation: 30 mm
Crop residues: chopped

Bare soil

Start: 18/09/2020
End: 30/11/2020
Duration: 73 days
Cumulated flux: 12.05 ± 1.57 mg N2O m-2
Average daily flux: 0.19 mg N2O m-2

Durum wheat

Sowing: 01/12/2020
Harvest: 24/06/2021
Duration: 205 days
Cumulated flux: 30.81 ± 1.80 mg N2O m-2
Average daily flux: 0.17 mg N2O m-2
Yield: 2.9 t ha-1 s.s.
Total biomass: 10.7 t ha-1 s.s.
Fertilisation: 222 kg ha-1 N + 30 kg ha-1 P2O5
Treatements: 2 fungicide
Crop residues: removed

Bare soil

Start: 25/06/2021
End: 21/12/2021
Duration: 179 days
Cumulated flux: 25.33 ± 4.16 mg N2O m-2
Average daily flux: 0.15 mg N2O m-2

Barley

Start: 22/12/2021
End: 30/06/2022
Duration: 190 days
Cumulated flux: 36.84 ± 5.32 mg N2O m-2
Average daily flux: 0.24 mg N2O m-2
Yield: 5.84 t ha-1 d.m.
Total biomass: 6.71 t ha-1 d.m.
Fertilisation: 109 kg ha-1 N + 40 kg ha-1 P2O5
Treatments: 1 fungicides, 1 herbicides
Crop residues: removed

Bare soil

Start: 01/07/2022
End: 31/10/2022
Duration: 122 days
Cumulated flux: 6.27 ± 0.28 mg N2O m-2
Average daily flux: 0.13 mg N2O m-2

ECS – Efficient Cropping System

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Bare soil

Start: 28/11/2019
End: 17/02/2020
Duration: 81 days
Cumulated flux: 15.69 ± 3.25 mg N2O m-2
Average daily flux: 0.20 mg N2O m-2

Lentil

Sowing: 18/02/2020
Harvest: 29/06/2020
Duration: 132 days
Cumulated flux: 18.02 ± 1.54 mg N2O m-2
Average daily flux: 0.14 mg N2O m-2
Yield: 0.2 t ha-1 s.s.
Total biomass: 0.5 t ha-1 s.s.
Irrigation: 30 mm
Treatements: 2 herbicide
Crop residues: on superface

Residues

Start: 30/06/2020
End: 21/09/2020
Duration: 83 days
Cumulated flux: 25.57 ± 1.21 mg N2O m-2
Average daily flux: 0.30 mg N2O m-2

Bare soil

Start: 22/09/2020
End: 30/11/2020
Duration: 69 days
Cumulated flux: 9.13 ± 0.82 mg N2O m-2
Average daily flux: 0.16 mg N2O m-2

Durum wheat

Sowing: 01/12/2020
Harvest: 24/06/2021
Duration: 205 days
Cumulated flux: 25.98 ± 4.46 mg N2O m-2
Average daily flux: 0.14 mg N2O m-2
Yield: 4.3 t ha-1 s.s.
Total biomass: 9.8 t ha-1 s.s.
Fertilisation: 98 kg ha-1 N + 35 kg ha-1 P2O5
Treatements: 1 fungicide
Crop residues: removed

Bare soil

Start: 25/06/2021
End: 03/10/2021
Duration: 100 days
Cumulated flux: 15.59 ± 1.40 mg N2O m-2
Average daily flux: 0.17 mg N2O m-2

Mustard

Start: 04/10/2021
End: 16/01/2022
Duration: 104 days
Cumulated flux: 14.32 ± 2.35 mg N2O m-2
Average daily flux: 0.14 mg N2O m-2
Total biomass: 3.77 t ha-1 d.m.
Crop was incorporated in soil

Bare soil

Start: 17/01/2022
End: 20/04/2022
Duration: 93 days
Cumulated flux: 15.26 ± 1.17 mg N2O m-2
Average daily flux: 0.17 mg N2O m-2

Sunflower

Start: 21/04/2022
End: 22/09/2022
Duration: 154 days
Cumulated flux: 24.98 ± 2.68 mg N2O m-2
Average daily flux: 0.31 mg N2O m-2
Yield: 1.7 t ha-1 d.m.
Total biomass: 42.4 t ha-1 d.m.
Fertilisation: 33.5 kg ha-1 N
Treatments: 2 herbicide
Residues: buried
Foggia N2O - Ultima modifica: 2021-09-29T09:32:36+00:00 da Redazione Digital Farm
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