Cover crop species affect N2O emissions at hotspot moments of summer crops
The use of cover crops, combined with low N fertilization and no-tillage, reduces theenvironmental impacts of agriculture. Legume cover crops provide N to the agroecosystem and allow N fertilization to be reduced without losing productivity, but may also increase nitrous oxide (N2O) emissions. Our m...
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| Format: | info:ar-repo/semantics/artículo |
| Language: | Inglés |
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Frontiers Media
2023
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| Online Access: | http://hdl.handle.net/20.500.12123/15321 https://www.frontiersin.org/articles/10.3389/fsoil.2022.903387/full https://doi.org/10.3389/fsoil.2022.903387 |
| _version_ | 1855037298810290176 |
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| author | Vangeli, Sebastián Restovich, Silvina Beatriz Posse Beaulieu, Gabriela |
| author_browse | Posse Beaulieu, Gabriela Restovich, Silvina Beatriz Vangeli, Sebastián |
| author_facet | Vangeli, Sebastián Restovich, Silvina Beatriz Posse Beaulieu, Gabriela |
| author_sort | Vangeli, Sebastián |
| collection | INTA Digital |
| description | The use of cover crops, combined with low N fertilization and no-tillage, reduces theenvironmental impacts of agriculture. Legume cover crops provide N to the agroecosystem and allow N fertilization to be reduced without losing productivity, but may also increase nitrous oxide (N2O) emissions. Our main objective was to evaluate the impact of using oats, vetch, and oats+vetch mixture as cover crops on N2O emissions and summer crop yields in a maize–soybean rotation with low N fertilization to maize (32 kg N ha−1) under no-tillage. We also studied how the different cover crops affected soil variables related to N2O emissions. For the treatments that included vetch (vetch and oats +vetch), plots without N fertilization were included to evaluate if N2O emissions and crop
yield were increased by low-rate N fertilization after a legume cover crop. We measured N2O emissions using static chambers in a long-term experiment located in the Argentine Pampas. We selected measurement periods in which high N2O fluxes were expected to
evaluate the effect of the different cover crops during these hotspots. In the early stages of maize and soybean, the use of vetch as a cover crop increased N2O emissions compared with oats and a control without a cover crop. In those early stages, conditions for high N2O flux occurrence were promoted by the use of cover crops, as they increased soil moisture and, when vetch was the cover crop, nitrate content. Although the oats+vetch mixture reduced soil nitrate availability compared with vetch, this was not reflected lower N2O
emissions. The use of oats as a cover crop did reduce N2O emissions compared with vetch and also decreased maize yields by 30.6%. The low-rate N fertilization in treatments that included vetch as a cover crop did not increase N2O emissions or yield significantly.
Our study demonstrates that in low-input cropping systems under no-tillage, the use of legume cover crops can favor yields and also increase N2O emissions during the early stages of the following cash crop. Consequently, future work should explore mitigation
strategies during this period. |
| format | info:ar-repo/semantics/artículo |
| id | INTA15321 |
| institution | Instituto Nacional de Tecnología Agropecuaria (INTA -Argentina) |
| language | Inglés |
| publishDate | 2023 |
| publishDateRange | 2023 |
| publishDateSort | 2023 |
| publisher | Frontiers Media |
| publisherStr | Frontiers Media |
| record_format | dspace |
| spelling | INTA153212023-09-26T18:01:45Z Cover crop species affect N2O emissions at hotspot moments of summer crops Vangeli, Sebastián Restovich, Silvina Beatriz Posse Beaulieu, Gabriela Nitrous Oxide Mitigation Farmland Nitrogen Maize Soybeans Óxido Nitroso Mitigación Tierras Agrícolas Nitrógeno Maíz Soja Región Pampeana The use of cover crops, combined with low N fertilization and no-tillage, reduces theenvironmental impacts of agriculture. Legume cover crops provide N to the agroecosystem and allow N fertilization to be reduced without losing productivity, but may also increase nitrous oxide (N2O) emissions. Our main objective was to evaluate the impact of using oats, vetch, and oats+vetch mixture as cover crops on N2O emissions and summer crop yields in a maize–soybean rotation with low N fertilization to maize (32 kg N ha−1) under no-tillage. We also studied how the different cover crops affected soil variables related to N2O emissions. For the treatments that included vetch (vetch and oats +vetch), plots without N fertilization were included to evaluate if N2O emissions and crop yield were increased by low-rate N fertilization after a legume cover crop. We measured N2O emissions using static chambers in a long-term experiment located in the Argentine Pampas. We selected measurement periods in which high N2O fluxes were expected to evaluate the effect of the different cover crops during these hotspots. In the early stages of maize and soybean, the use of vetch as a cover crop increased N2O emissions compared with oats and a control without a cover crop. In those early stages, conditions for high N2O flux occurrence were promoted by the use of cover crops, as they increased soil moisture and, when vetch was the cover crop, nitrate content. Although the oats+vetch mixture reduced soil nitrate availability compared with vetch, this was not reflected lower N2O emissions. The use of oats as a cover crop did reduce N2O emissions compared with vetch and also decreased maize yields by 30.6%. The low-rate N fertilization in treatments that included vetch as a cover crop did not increase N2O emissions or yield significantly. Our study demonstrates that in low-input cropping systems under no-tillage, the use of legume cover crops can favor yields and also increase N2O emissions during the early stages of the following cash crop. Consequently, future work should explore mitigation strategies during this period. Fil: Vangeli, Sebastián. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto De Investigación Clima y Agua; Argentina. Universidad de Buenos Aires. Facultad de Agronomia. Departamento de Ingenieria Agricola y Uso de la Tierra. Cátedra de Manejo y Conservación de Suelo; Argentina Fil: Restovich, Silvina B. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Pergamino. Laboratorio de Suelos; Argentina Fil: Posse Beaulieu, Gabriela. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Clima y Agua; Argentina 2023-09-26T17:26:24Z 2023-09-26T17:26:24Z 2022-06-01 info:ar-repo/semantics/artículo info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://hdl.handle.net/20.500.12123/15321 https://www.frontiersin.org/articles/10.3389/fsoil.2022.903387/full 2673-8619 https://doi.org/10.3389/fsoil.2022.903387 eng info:eu-repograntAgreement/INTA/PNNAT-1128023/AR./Emisiones de gases con efecto invernadero. info:eu-repograntAgreement/INTA/2019-PD-E3-I058-001, EMISIONES (GEI) EN LOS SISTEMAS AGROPECUARIOS y FORESTALES. MEDIDAS DE MITIGACIÓN info:eu-repograntAgreement/INTA/2019-PE-E1-I011-001, Intensificacion Sustentable de la Agricultura en la Region Pampeana info:eu-repograntAgreement/INTA/2019-PD-E3-I062-001, Estrategias de producción que incrementen el secuestro de C en suelo para la mitigación del Cambio Climático info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) application/pdf Frontiers Media Frontiers in Soil Science 2 : 903387 (June 2022) |
| spellingShingle | Nitrous Oxide Mitigation Farmland Nitrogen Maize Soybeans Óxido Nitroso Mitigación Tierras Agrícolas Nitrógeno Maíz Soja Región Pampeana Vangeli, Sebastián Restovich, Silvina Beatriz Posse Beaulieu, Gabriela Cover crop species affect N2O emissions at hotspot moments of summer crops |
| title | Cover crop species affect N2O emissions at hotspot moments of summer crops |
| title_full | Cover crop species affect N2O emissions at hotspot moments of summer crops |
| title_fullStr | Cover crop species affect N2O emissions at hotspot moments of summer crops |
| title_full_unstemmed | Cover crop species affect N2O emissions at hotspot moments of summer crops |
| title_short | Cover crop species affect N2O emissions at hotspot moments of summer crops |
| title_sort | cover crop species affect n2o emissions at hotspot moments of summer crops |
| topic | Nitrous Oxide Mitigation Farmland Nitrogen Maize Soybeans Óxido Nitroso Mitigación Tierras Agrícolas Nitrógeno Maíz Soja Región Pampeana |
| url | http://hdl.handle.net/20.500.12123/15321 https://www.frontiersin.org/articles/10.3389/fsoil.2022.903387/full https://doi.org/10.3389/fsoil.2022.903387 |
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