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

Nitrous oxide (N2O) fluxes from soil measured in demonstration site in Ravenna 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: 11/12/2019
End: 01/04/2019
Duration: 112 days
Cumulated flux: 2.58 ± 0.18 mg N2O m-2
Average daily flux: 0.02 mg N2O m-2

Maize

Sowing: 02/04/2020
Harvest: 10/09/2020
Duration: 161 days
Cumulated flux: 154.23 ± 14.51 mg N2O m-2
Average daily flux: 0.96 mg N2O m-2
Yield: 8.8 t ha-1 s.s.
Total biomass: 21.6 t ha-1 s.s.
Fertilisation: 196.6 kg ha-1 N
Irrigation: 75 mm
Treatments: 2 insetticides, 2 herbicides
Crop residues: chopped

Bare soil

Start: 11/09/2020
End: 19/10/2020
Duration: 38 days
Cumulated flux: 32.28 ± 1.80 mg N2O m-2
Average daily flux: 0,92 mg N2O m-2

Durum wheat

Sowing: 20/10/2020
Harvest: 24/06/2021
Duration: 247 days
Cumulated flux: 280.98 ± 169.22 mg N2O m-2
Average daily flux: 1.14 mg N2O m-2
Yield: 6.8 t ha-1 s.s.
Total biomass: 16.2 t ha-1 s.s.
Fertilisation: 180.4 kg ha-1 N
Treatments: 1 fungicide, 1 herbicied
Crop residues: removed

Bare soil

Start: 25/06/2021
End: 16/05/2022
Duration: 325 days
Cumulated flux: 112.52 ± 40.12 mg N2O m-2
Average daily flux: 0.35 mg N2O m-2

Tomato

Start: 17/05/2022
End: 22/08/2022
Duration: 102 days
Cumulated flux: 85.06 ± 25.93 mg N2O m-2
Average daily flux: 0.88 mg N2O m-2
Yield: 6.3 t ha-1 d.m.
Total biomass: 12.9 t ha-1 d.m.
Fertilisation: 140.1 kg ha-1 N, 100.2 kg ha-1 P2O5, 137.8 kg ha-1 K2O
Irrigation: 389 mm
Treatments: 1 insecticide, 3 herbicide, 10 fungicide
Residues: buried

Bare soil

Start: 28/08/2021
End: 31/10/2022
Duration: 64 days
Cumulated flux: 22.91 ± 4.35 mg N2O m-2
Average daily flux: 1.27 mg N2O m-2

ECS – Efficient Cropping System

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Pea

Sowing: 11/12/2019
Harvest: 19/06/2020
Duration 191 days
Cumulated flux: 2.74 ± 0.20 mg N2O m-2
Average daily flux: 0.01 mg N2O m-2
Yield: 4.0 t ha-1 s.s.
Total biomass: 8.3 t ha-1 s.s.
Irrigation: 25 mm
Treatments: 1 herbicide
Crop residues: chopped

Bare soil

Start: 20/06/2020
End: 19/10/2020
Duration: 121 days
Cumulated flux: 118.99 ± 8,12 mg N2O m-2
Average daily flux: 0.98 mg N2O m-2

Durum wheat

Sowing: 20/10/2020
Harvest: 24/06/2021
Duration: 247 days
Cumulated flux: 85.63 ± 8.85 mg N2O m-2
Average daily flux: 0.35 mg N2O m-2
Yield: 7.4 t ha-1 s.s.
Total biomass: 16.4 t ha-1 s.s.
Fertilisation: 130.0 kg ha-1 N
Irrigation: 75 mm
Treatments: 1 fungicide
Crop residues: removed

Alfalfa

Start: 25/06/2021
End: 05/10/2021
Durataion: 102 days
Cumulated flux: 38.10 ± 11.82 mg N2O m-2
Average daily flux: 0.37 mg N2O m-2
Total biomass: 0.4 t ha-1 d.m.

Bare soil

Start: 06/10/2021
End: 16/05/2022
Durataion: 222 days
Cumulated flux: 45.65 ± 23.17 mg N2O m-2
Average daily flux: 0.21 mg N2O m-2

Tomato

Start: 17/05/2022
End: 28/08/2022
Durataion: 106 days
Cumulated flux: 40.36 ± 6.59 mg N2O m-2
Average daily flux: 0.38 mg N2O m-2
Yield: 5.7 t ha-1 d.m.
Total biomass: 11.2 t ha-1 d.m.
Fertilisation: 109.3 kg ha-1 N, 101.8 kg ha-1 P2O5, 135.6 kg ha-1 K2O
Irrigation: 311 mm
Treatments: 1 insecticide, 3 herbicide, 9 fungicide
Residues: buried

Bare soil

Start: 28/08/2021
End: 31/10/2022
Durataion: 64 days
Cumulated flux: 8.65 ± 1.48 mg N2O m-2
Average daily flux: 0.48 mg N2O m-2
Ravenna N2O - Ultima modifica: 2021-09-29T09:31:02+00:00 da Redazione Digital Farm
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