Evaluating the Potential of Legumes to Mitigate N2O Emissions From Permanent Grassland Using Process-Based Models
A potential strategy for mitigating nitrous oxide (N2O) emissions from permanent grasslands is the partial substitution of fertilizer nitrogen (Nfert) with symbiotically fixed nitrogen (Nsymb) from legumes. The input of Nsymb reduces the energy costs of producing fertilizer and provides a supply of...
| Autores principales: | , , , , , , , , , , , , , , , , , , , , , , |
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| Formato: | Journal Article |
| Lenguaje: | Inglés |
| Publicado: |
American Geophysical Union
2020
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| Materias: | |
| Acceso en línea: | https://hdl.handle.net/10568/129558 |
| _version_ | 1855518552138711040 |
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| author | Fuchs, Kathrin Merbold, Lutz Buchmann, Nina Bellocchi, Gianni Bindi, Marco Brilli, Lorenzo Conant, Richard T. Dorich, Christopher D. Ehrhardt, Fiona Fitton, Nuala Grace, Peter Klumpp, Katja Liebig, Mark Lieffering, Mark Martin, Raphaël McAuliffe, Russell Newton, Paul C.D. Rees, Robert M. Recous, Sylvie Smith, Pete Soussana, Jean‐François Topp, Cairistiona F.E. Snow, Val O. |
| author_browse | Bellocchi, Gianni Bindi, Marco Brilli, Lorenzo Buchmann, Nina Conant, Richard T. Dorich, Christopher D. Ehrhardt, Fiona Fitton, Nuala Fuchs, Kathrin Grace, Peter Klumpp, Katja Liebig, Mark Lieffering, Mark Martin, Raphaël McAuliffe, Russell Merbold, Lutz Newton, Paul C.D. Recous, Sylvie Rees, Robert M. Smith, Pete Snow, Val O. Soussana, Jean‐François Topp, Cairistiona F.E. |
| author_facet | Fuchs, Kathrin Merbold, Lutz Buchmann, Nina Bellocchi, Gianni Bindi, Marco Brilli, Lorenzo Conant, Richard T. Dorich, Christopher D. Ehrhardt, Fiona Fitton, Nuala Grace, Peter Klumpp, Katja Liebig, Mark Lieffering, Mark Martin, Raphaël McAuliffe, Russell Newton, Paul C.D. Rees, Robert M. Recous, Sylvie Smith, Pete Soussana, Jean‐François Topp, Cairistiona F.E. Snow, Val O. |
| author_sort | Fuchs, Kathrin |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | A potential strategy for mitigating nitrous oxide (N2O) emissions from permanent grasslands is the partial substitution of fertilizer nitrogen (Nfert) with symbiotically fixed nitrogen (Nsymb) from legumes. The input of Nsymb reduces the energy costs of producing fertilizer and provides a supply of nitrogen (N) for plants that is more synchronous to plant demand than occasional fertilizer applications. Legumes have been promoted as a potential N2O mitigation strategy for grasslands, but evidence to support their efficacy is limited, partly due to the difficulty in conducting experiments across the large range of potential combinations of legume proportions and fertilizer N inputs. These experimental constraints can be overcome by biogeochemical models that can vary legume‐fertilizer combinations and subsequently aid the design of targeted experiments. Using two variants each of two biogeochemical models (APSIM and DayCent), we tested the N2O mitigation potential and productivity of full factorial combinations of legume proportions and fertilizer rates for five temperate grassland sites across the globe. Both models showed that replacing fertilizer with legumes reduced N2O emissions without reducing productivity across a broad range of legume‐fertilizer combinations. Although the models were consistent with the relative changes of N2O emissions compared to the baseline scenario (200 kg N ha−1 yr−1; no legumes), they predicted different levels of absolute N2O emissions and thus also of absolute N2O emission reductions; both were greater in DayCent than in APSIM. We recommend confirming these results with experimental studies assessing the effect of clover proportions in the range 30–50% and ≤150 kg N ha−1 yr−1 input as these were identified as best‐bet climate smart agricultural practices. |
| format | Journal Article |
| id | CGSpace129558 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2020 |
| publishDateRange | 2020 |
| publishDateSort | 2020 |
| publisher | American Geophysical Union |
| publisherStr | American Geophysical Union |
| record_format | dspace |
| spelling | CGSpace1295582025-12-08T09:54:28Z Evaluating the Potential of Legumes to Mitigate N2O Emissions From Permanent Grassland Using Process-Based Models Fuchs, Kathrin Merbold, Lutz Buchmann, Nina Bellocchi, Gianni Bindi, Marco Brilli, Lorenzo Conant, Richard T. Dorich, Christopher D. Ehrhardt, Fiona Fitton, Nuala Grace, Peter Klumpp, Katja Liebig, Mark Lieffering, Mark Martin, Raphaël McAuliffe, Russell Newton, Paul C.D. Rees, Robert M. Recous, Sylvie Smith, Pete Soussana, Jean‐François Topp, Cairistiona F.E. Snow, Val O. models legumes A potential strategy for mitigating nitrous oxide (N2O) emissions from permanent grasslands is the partial substitution of fertilizer nitrogen (Nfert) with symbiotically fixed nitrogen (Nsymb) from legumes. The input of Nsymb reduces the energy costs of producing fertilizer and provides a supply of nitrogen (N) for plants that is more synchronous to plant demand than occasional fertilizer applications. Legumes have been promoted as a potential N2O mitigation strategy for grasslands, but evidence to support their efficacy is limited, partly due to the difficulty in conducting experiments across the large range of potential combinations of legume proportions and fertilizer N inputs. These experimental constraints can be overcome by biogeochemical models that can vary legume‐fertilizer combinations and subsequently aid the design of targeted experiments. Using two variants each of two biogeochemical models (APSIM and DayCent), we tested the N2O mitigation potential and productivity of full factorial combinations of legume proportions and fertilizer rates for five temperate grassland sites across the globe. Both models showed that replacing fertilizer with legumes reduced N2O emissions without reducing productivity across a broad range of legume‐fertilizer combinations. Although the models were consistent with the relative changes of N2O emissions compared to the baseline scenario (200 kg N ha−1 yr−1; no legumes), they predicted different levels of absolute N2O emissions and thus also of absolute N2O emission reductions; both were greater in DayCent than in APSIM. We recommend confirming these results with experimental studies assessing the effect of clover proportions in the range 30–50% and ≤150 kg N ha−1 yr−1 input as these were identified as best‐bet climate smart agricultural practices. 2020-12 2023-03-10T14:39:11Z 2023-03-10T14:39:11Z Journal Article https://hdl.handle.net/10568/129558 en Open Access American Geophysical Union Fuchs, Kathrin; Merbold, Lutz; Buchmann, Nina; Bellocchi, Gianni; Bindi, Marco; Brilli, Lorenzo; Conant, Richard T.; Dorich, Christopher D.; Ehrhardt, Fiona; Fitton, Nuala; Grace, Peter; Klumpp, Katja; Liebig, Mark; Lieffering, Mark; Martin, Raphaël; McAuliffe, Russell; Newton, Paul C.D.; Rees, Robert M.; Recous, Sylvie; Smith, Pete; Soussana, Jean-François; Topp, Cairistiona F.E.; Snow, Val O. 2020. Evaluating the Potential of Legumes to Mitigate N2O Emissions From Permanent Grassland Using Process-Based Models. Global Biogeochemical Cycles 34: |
| spellingShingle | models legumes Fuchs, Kathrin Merbold, Lutz Buchmann, Nina Bellocchi, Gianni Bindi, Marco Brilli, Lorenzo Conant, Richard T. Dorich, Christopher D. Ehrhardt, Fiona Fitton, Nuala Grace, Peter Klumpp, Katja Liebig, Mark Lieffering, Mark Martin, Raphaël McAuliffe, Russell Newton, Paul C.D. Rees, Robert M. Recous, Sylvie Smith, Pete Soussana, Jean‐François Topp, Cairistiona F.E. Snow, Val O. Evaluating the Potential of Legumes to Mitigate N2O Emissions From Permanent Grassland Using Process-Based Models |
| title | Evaluating the Potential of Legumes to Mitigate N2O Emissions From Permanent Grassland Using Process-Based Models |
| title_full | Evaluating the Potential of Legumes to Mitigate N2O Emissions From Permanent Grassland Using Process-Based Models |
| title_fullStr | Evaluating the Potential of Legumes to Mitigate N2O Emissions From Permanent Grassland Using Process-Based Models |
| title_full_unstemmed | Evaluating the Potential of Legumes to Mitigate N2O Emissions From Permanent Grassland Using Process-Based Models |
| title_short | Evaluating the Potential of Legumes to Mitigate N2O Emissions From Permanent Grassland Using Process-Based Models |
| title_sort | evaluating the potential of legumes to mitigate n2o emissions from permanent grassland using process based models |
| topic | models legumes |
| url | https://hdl.handle.net/10568/129558 |
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