Stover quality and soil organic carbon in long-term nitrogen-fertilized maize
Nitrogen fertilization often increases maize (Zea mays L.) grain yield but reduces the C/N ratio of stover returned to the soil, which may affect the soil organic carbon (SOC) balance. This study evaluated the long-term effect of N fertilization on maize grain yield, stover quality in terms of its C...
| Autores principales: | , , , |
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| Formato: | Artículo |
| Lenguaje: | Inglés |
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Alliance of Crop, Soil, and Environmental Science Societies
2018
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| Acceso en línea: | http://hdl.handle.net/20.500.12123/3882 https://dl.sciencesocieties.org/publications/aj/abstracts/106/5/1709 |
| _version_ | 1855483322470236160 |
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| author | Melchiori, Ricardo Jose Novelli, Leonardo Esteban Gregorutti, Viviana Carolina Caviglia, Octavio |
| author_browse | Caviglia, Octavio Gregorutti, Viviana Carolina Melchiori, Ricardo Jose Novelli, Leonardo Esteban |
| author_facet | Melchiori, Ricardo Jose Novelli, Leonardo Esteban Gregorutti, Viviana Carolina Caviglia, Octavio |
| author_sort | Melchiori, Ricardo Jose |
| collection | INTA Digital |
| description | Nitrogen fertilization often increases maize (Zea mays L.) grain yield but reduces the C/N ratio of stover returned to the soil, which may affect the soil organic carbon (SOC) balance. This study evaluated the long-term effect of N fertilization on maize grain yield, stover quality in terms of its C/N ratio, and its effect on SOC. In addition, a simulation approach was used to account for the effect of stover quality on its mineralization and SOC balance. Maize grain yield, stover production and quality, and SOC stock were measured during a 6-yr period (2006–2012) in a long-term N fertilization experiment under continuous maize since 1994 in Paraná, Argentina. On average, grain yield ranged from 5.06 in 2011 to 9.10 Mg ha–1in 2009. The N effect on grain yield, significant in all seasons, was more important than the effect on C stover production. In contrast, stover C/N ratio showed a linear decrease as a function of N fertilization. Changes in the stover C/N ratio were inversely proportional to the difference between the N rate and the agronomical optimum nitrogen rate (AONR). Although N fertilization increased stover C inputs in 3 out of 6 yr, SOC stock remained unchanged. Simulation results indicate that the required stover amount to maintain the SOC stock increased as the C/N ratio decreased. Our results contribute to better understanding of the previous, controversial results of the N effect on SOC and provide useful insights to develop or improve simulation models for SOC dynamics. |
| format | Artículo |
| id | INTA3882 |
| institution | Instituto Nacional de Tecnología Agropecuaria (INTA -Argentina) |
| language | Inglés |
| publishDate | 2018 |
| publishDateRange | 2018 |
| publishDateSort | 2018 |
| publisher | Alliance of Crop, Soil, and Environmental Science Societies |
| publisherStr | Alliance of Crop, Soil, and Environmental Science Societies |
| record_format | dspace |
| spelling | INTA38822018-11-13T14:57:43Z Stover quality and soil organic carbon in long-term nitrogen-fertilized maize Melchiori, Ricardo Jose Novelli, Leonardo Esteban Gregorutti, Viviana Carolina Caviglia, Octavio Maíz Zea Mays Carbono Orgánico del Suelo Abonos Nitrogenados Rendimiento Maize Soil Organic Carbon Nitrogen Fertilizers Yields Fertilización Nitrogenada Nitrogen fertilization often increases maize (Zea mays L.) grain yield but reduces the C/N ratio of stover returned to the soil, which may affect the soil organic carbon (SOC) balance. This study evaluated the long-term effect of N fertilization on maize grain yield, stover quality in terms of its C/N ratio, and its effect on SOC. In addition, a simulation approach was used to account for the effect of stover quality on its mineralization and SOC balance. Maize grain yield, stover production and quality, and SOC stock were measured during a 6-yr period (2006–2012) in a long-term N fertilization experiment under continuous maize since 1994 in Paraná, Argentina. On average, grain yield ranged from 5.06 in 2011 to 9.10 Mg ha–1in 2009. The N effect on grain yield, significant in all seasons, was more important than the effect on C stover production. In contrast, stover C/N ratio showed a linear decrease as a function of N fertilization. Changes in the stover C/N ratio were inversely proportional to the difference between the N rate and the agronomical optimum nitrogen rate (AONR). Although N fertilization increased stover C inputs in 3 out of 6 yr, SOC stock remained unchanged. Simulation results indicate that the required stover amount to maintain the SOC stock increased as the C/N ratio decreased. Our results contribute to better understanding of the previous, controversial results of the N effect on SOC and provide useful insights to develop or improve simulation models for SOC dynamics. EEA Paraná Fil: Melchiori, Ricardo Jose. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Paraná. Grupo Recursos Naturales y Factores Abióticos; Argentina Fil: Novelli, Leonardo Esteban. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Paraná; Argentina. Universidad Nacional de Entre Ríos. Facultad Ciencias Agropecuarias; Argentina Fil: Gregorutti, Viviana Carolina. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Paraná; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Caviglia, Octavio. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Paraná. Grupo Ecología Forestal; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Entre Ríos. Facultad de Ciencias Agropecuarias; Argentina 2018-11-13T14:52:13Z 2018-11-13T14:52:13Z 2014-09 info:ar-repo/semantics/artículo info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://hdl.handle.net/20.500.12123/3882 https://dl.sciencesocieties.org/publications/aj/abstracts/106/5/1709 1435-0645 10.2134/agronj14.0194 eng info:eu-repo/semantics/restrictedAccess application/pdf Alliance of Crop, Soil, and Environmental Science Societies Agronomy journal 106 (5) : 1709-1716. (September 24, 2014) |
| spellingShingle | Maíz Zea Mays Carbono Orgánico del Suelo Abonos Nitrogenados Rendimiento Maize Soil Organic Carbon Nitrogen Fertilizers Yields Fertilización Nitrogenada Melchiori, Ricardo Jose Novelli, Leonardo Esteban Gregorutti, Viviana Carolina Caviglia, Octavio Stover quality and soil organic carbon in long-term nitrogen-fertilized maize |
| title | Stover quality and soil organic carbon in long-term nitrogen-fertilized maize |
| title_full | Stover quality and soil organic carbon in long-term nitrogen-fertilized maize |
| title_fullStr | Stover quality and soil organic carbon in long-term nitrogen-fertilized maize |
| title_full_unstemmed | Stover quality and soil organic carbon in long-term nitrogen-fertilized maize |
| title_short | Stover quality and soil organic carbon in long-term nitrogen-fertilized maize |
| title_sort | stover quality and soil organic carbon in long term nitrogen fertilized maize |
| topic | Maíz Zea Mays Carbono Orgánico del Suelo Abonos Nitrogenados Rendimiento Maize Soil Organic Carbon Nitrogen Fertilizers Yields Fertilización Nitrogenada |
| url | http://hdl.handle.net/20.500.12123/3882 https://dl.sciencesocieties.org/publications/aj/abstracts/106/5/1709 |
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