Fertilizer vs. organic matter contributions to nitrogen leaching in cropping systems of the Pampas: 15N application in field lysimeters
Nitrogen (N) export from soils to streams and groundwater under the intensifying cropping schemes of the Pampas is modest compared to intensively cultivated basins of Europe and North America; however, a slowNenrichment of water resources has been suggested. We (1) analyzed the fate of fertilizer N...
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| Format: | Artículo |
| Language: | Inglés |
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2021
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| Online Access: | http://hdl.handle.net/20.500.12123/10382 https://link.springer.com/article/10.1007/s11104-006-9134-z https://doi.org/10.1007/s11104-006-9134-z |
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| author | Portela, Silvina Isabel Andriulo, Adrian Enrique Sasal, Maria Carolina Mary, Bruno Jobbagy Gampel, Esteban Gabriel |
| author_browse | Andriulo, Adrian Enrique Jobbagy Gampel, Esteban Gabriel Mary, Bruno Portela, Silvina Isabel Sasal, Maria Carolina |
| author_facet | Portela, Silvina Isabel Andriulo, Adrian Enrique Sasal, Maria Carolina Mary, Bruno Jobbagy Gampel, Esteban Gabriel |
| author_sort | Portela, Silvina Isabel |
| collection | INTA Digital |
| description | Nitrogen (N) export from soils to streams and groundwater under the intensifying cropping schemes of the Pampas is modest compared to intensively cultivated basins of Europe and North America; however, a slowNenrichment of water resources has been suggested. We (1) analyzed the fate of fertilizer N and (2) evaluated the contribution of fertilizer and soil organic matter (SOM) to N leaching under the typical cropping conditions of the Pampas. Fertilizer N was applied as 15N-labeled ammonium sulfate to corn (in a corn/soybean rotation) sown under zero tillage in filled-in lysimeters containing two soils of different texture representative of the Pampean region (52 and 78 kg N ha-1, added to the silt loam and sandy loam soil, respectively). Total fertilizer recovery at corn harvest averaged 84 and 64% for the silt loam and sandy loam lysimeters, respectively. Most fertilizer N was removed with plant biomass (39%) or remained immobilized in the soil (29 and 15%, for the silt loam and sandy loam soil, respectively) whereas its loss through drainage was negligible (<0.01%).We presume that the unaccounted fertilizer N losses were related to volatilization and denitrification. Throughout the corn growing season, subsequent fallow and soybean crop, which took place during an exceptionally dry period, the fertilizer N immobilized in the organic pool remained stable, and N leaching was scarce (7.5 kg N ha-1), similar at both soils, and
had a low contribution of fertilizer N (0–3.5%), implying that >96% of the leached N was derived fromSOMmineralization. The inherent highSOM of Pampean soils and the favorable climatic conditions are likely to propitiate year-round production of nitrate, favoring its participation in crop nutrition and leaching. The presence of 15N in drainage water, however, suggests that fertilizer N leaching could become significant in situations with higher fertilization rates or more rainy seasons. |
| format | Artículo |
| id | INTA10382 |
| institution | Instituto Nacional de Tecnología Agropecuaria (INTA -Argentina) |
| language | Inglés |
| publishDate | 2021 |
| publishDateRange | 2021 |
| publishDateSort | 2021 |
| publisher | Springer |
| publisherStr | Springer |
| record_format | dspace |
| spelling | INTA103822021-09-29T10:42:38Z Fertilizer vs. organic matter contributions to nitrogen leaching in cropping systems of the Pampas: 15N application in field lysimeters Portela, Silvina Isabel Andriulo, Adrian Enrique Sasal, Maria Carolina Mary, Bruno Jobbagy Gampel, Esteban Gabriel Maize Soil Organic Matter Lysimeters Nitrogen Fertilizers Leaching Nitrogen Zea mays Maíz Materia Orgánica del Suelo Lisimetros Abonos Nitrogenados Lixiviación Nitrógeno Humid Pampas Region Región Pampa Húmeda Nitrogen (N) export from soils to streams and groundwater under the intensifying cropping schemes of the Pampas is modest compared to intensively cultivated basins of Europe and North America; however, a slowNenrichment of water resources has been suggested. We (1) analyzed the fate of fertilizer N and (2) evaluated the contribution of fertilizer and soil organic matter (SOM) to N leaching under the typical cropping conditions of the Pampas. Fertilizer N was applied as 15N-labeled ammonium sulfate to corn (in a corn/soybean rotation) sown under zero tillage in filled-in lysimeters containing two soils of different texture representative of the Pampean region (52 and 78 kg N ha-1, added to the silt loam and sandy loam soil, respectively). Total fertilizer recovery at corn harvest averaged 84 and 64% for the silt loam and sandy loam lysimeters, respectively. Most fertilizer N was removed with plant biomass (39%) or remained immobilized in the soil (29 and 15%, for the silt loam and sandy loam soil, respectively) whereas its loss through drainage was negligible (<0.01%).We presume that the unaccounted fertilizer N losses were related to volatilization and denitrification. Throughout the corn growing season, subsequent fallow and soybean crop, which took place during an exceptionally dry period, the fertilizer N immobilized in the organic pool remained stable, and N leaching was scarce (7.5 kg N ha-1), similar at both soils, and had a low contribution of fertilizer N (0–3.5%), implying that >96% of the leached N was derived fromSOMmineralization. The inherent highSOM of Pampean soils and the favorable climatic conditions are likely to propitiate year-round production of nitrate, favoring its participation in crop nutrition and leaching. The presence of 15N in drainage water, however, suggests that fertilizer N leaching could become significant in situations with higher fertilization rates or more rainy seasons. Estación Experimental Agropecuaria Pergamino Fil: Portela, Silvina Isabel. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Pergamino; Argentina Fil: Andriulo, Adrián Enrique. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Pergamino; Argentina Fil: Sasal, Maria Carolina. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Paraná; Argentina Fil: Mary, Bruno. INRA. Unité d’Agronomie; France Fil: Jobbágy, Esteban G. Universidad Nacional de San Luis. Instituto de Matemática Aplicada San Luis (IMASL). Grupo de Estudio Ambiental; Argentina. Fil: Jobbágy, Esteban G. Consejo Nacional de Investigaciones Científicas y Técnicas. Grupo de Estudio Ambiental; Argentina 2021-09-29T10:33:33Z 2021-09-29T10:33:33Z 2006-11-07 info:ar-repo/semantics/artículo info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://hdl.handle.net/20.500.12123/10382 https://link.springer.com/article/10.1007/s11104-006-9134-z 0032-079X 1573-5036 https://doi.org/10.1007/s11104-006-9134-z eng info:eu-repograntAgreement/INTA/PNSUELO-1134042/AR./Aprovechamiento de residuos para aumentar el reciclado en el suelo. Sumideros de carbono y emisiones del suelo. info:eu-repo/semantics/restrictedAccess application/pdf Springer Plant and Soil 289 : 265–277 (2006) |
| spellingShingle | Maize Soil Organic Matter Lysimeters Nitrogen Fertilizers Leaching Nitrogen Zea mays Maíz Materia Orgánica del Suelo Lisimetros Abonos Nitrogenados Lixiviación Nitrógeno Humid Pampas Region Región Pampa Húmeda Portela, Silvina Isabel Andriulo, Adrian Enrique Sasal, Maria Carolina Mary, Bruno Jobbagy Gampel, Esteban Gabriel Fertilizer vs. organic matter contributions to nitrogen leaching in cropping systems of the Pampas: 15N application in field lysimeters |
| title | Fertilizer vs. organic matter contributions to nitrogen leaching in cropping systems of the Pampas: 15N application in field lysimeters |
| title_full | Fertilizer vs. organic matter contributions to nitrogen leaching in cropping systems of the Pampas: 15N application in field lysimeters |
| title_fullStr | Fertilizer vs. organic matter contributions to nitrogen leaching in cropping systems of the Pampas: 15N application in field lysimeters |
| title_full_unstemmed | Fertilizer vs. organic matter contributions to nitrogen leaching in cropping systems of the Pampas: 15N application in field lysimeters |
| title_short | Fertilizer vs. organic matter contributions to nitrogen leaching in cropping systems of the Pampas: 15N application in field lysimeters |
| title_sort | fertilizer vs organic matter contributions to nitrogen leaching in cropping systems of the pampas 15n application in field lysimeters |
| topic | Maize Soil Organic Matter Lysimeters Nitrogen Fertilizers Leaching Nitrogen Zea mays Maíz Materia Orgánica del Suelo Lisimetros Abonos Nitrogenados Lixiviación Nitrógeno Humid Pampas Region Región Pampa Húmeda |
| url | http://hdl.handle.net/20.500.12123/10382 https://link.springer.com/article/10.1007/s11104-006-9134-z https://doi.org/10.1007/s11104-006-9134-z |
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