Nitrification inhibitors reduce $ N_{2} $O emissions induced by application of biogas digestate to oilseed rape
Abstract Winter oilseed rape (WOSR) is the major oil crop cultivated in Europe and the most important feedstock for biodiesel. Up to 90% of the greenhouse gas (GHG) emissions from biodiesel production can occur during oilseed rape cultivation. Therefore, mitigation strategies are required and need to focus on direct nitrous oxide ($ N_{2} $O) emission as one of the largest GHG contributors in biodiesel production. Earlier studies show that nitrification inhibitors (NIs) can reduce $ N_{2} $O emissions derived from N-fertilization. Since information on the effect of biogas digestates with or without NIs on $ N_{2} $O emissions from WOSR fields is scarce, the aim of this study was to evaluate their effects on $ N_{2} $O emissions, mineral N dynamics, and oil yield in WOSR production fertilized with digestate. The study was conducted at five sites across Germany over three years resulting in 15 full site-years data sets. Across all sites and years, $ N_{2} $O emission from WOSR fertilized with biogas digestate (180 kg $ NH_{4} $+-N $ ha^{−1} $$ yr^{−1} $) ranged between 0.2 and 3.5 kg $ N_{2} $O–N $ ha^{−1} $ $ yr^{−1} $. Due to the reduction of the nitrate concentrations following digestate application, application of NI significantly reduced annual $ N_{2} $O emission by 36%. Our results demonstrate that NI can be an effective measure for reducing $ N_{2} $O emissions from digestate application, but its effectiveness depends on soil and weather conditions, and ultimately on the site-specific potential for $ N_{2} $O production and release. There was no effect of NI application on grain and oil yield..
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Artikel |
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| Erscheinungsjahr: |
2021 |
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| Erschienen: |
2021 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:120 |
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| Enthalten in: |
Nutrient cycling in agroecosystems - 120(2021), 1 vom: 15. März, Seite 99-118 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Kesenheimer, Katharina [VerfasserIn] |
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| Links: |
Volltext [lizenzpflichtig] |
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| BKL: | |
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| Themen: |
Biodiesel |
| Anmerkungen: |
© The Author(s) 2021. corrected publication 2021 |
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| doi: |
10.1007/s10705-021-10127-8 |
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| funding: |
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| Förderinstitution / Projekttitel: |
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| PPN (Katalog-ID): |
OLC2125434636 |
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| 520 | |a Abstract Winter oilseed rape (WOSR) is the major oil crop cultivated in Europe and the most important feedstock for biodiesel. Up to 90% of the greenhouse gas (GHG) emissions from biodiesel production can occur during oilseed rape cultivation. Therefore, mitigation strategies are required and need to focus on direct nitrous oxide ($ N_{2} $O) emission as one of the largest GHG contributors in biodiesel production. Earlier studies show that nitrification inhibitors (NIs) can reduce $ N_{2} $O emissions derived from N-fertilization. Since information on the effect of biogas digestates with or without NIs on $ N_{2} $O emissions from WOSR fields is scarce, the aim of this study was to evaluate their effects on $ N_{2} $O emissions, mineral N dynamics, and oil yield in WOSR production fertilized with digestate. The study was conducted at five sites across Germany over three years resulting in 15 full site-years data sets. Across all sites and years, $ N_{2} $O emission from WOSR fertilized with biogas digestate (180 kg $ NH_{4} $+-N $ ha^{−1} $$ yr^{−1} $) ranged between 0.2 and 3.5 kg $ N_{2} $O–N $ ha^{−1} $ $ yr^{−1} $. Due to the reduction of the nitrate concentrations following digestate application, application of NI significantly reduced annual $ N_{2} $O emission by 36%. Our results demonstrate that NI can be an effective measure for reducing $ N_{2} $O emissions from digestate application, but its effectiveness depends on soil and weather conditions, and ultimately on the site-specific potential for $ N_{2} $O production and release. There was no effect of NI application on grain and oil yield. | ||
| 650 | 4 | |a GHG reduction | |
| 650 | 4 | |a N-fertilization | |
| 650 | 4 | |a Winter oilseed rape | |
| 650 | 4 | |a Nitrification inhibition | |
| 650 | 4 | |a Yield-related emission | |
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| 700 | 1 | |a Stichnothe, Heinz |4 aut | |
| 700 | 1 | |a Flessa, Heinz |4 aut | |
| 700 | 1 | |a Ruser, Reiner |4 aut | |
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