Soil respiration response to reductions in maize plant density and increased row spacing (Southeast pampas, Argentina)
Previous studies have recognized the influence of crop cover and agricultural management on variables (soil temperature, soil moisture, and root biomass) that influence soil respiration. However, despite the influence of plant density and row spacing on these variables in the maize crop (Zea mays L....
| Autores principales: | , , , , , |
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| Formato: | info:ar-repo/semantics/artículo |
| Lenguaje: | Inglés |
| Publicado: |
Elsevier
2024
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| Materias: | |
| Acceso en línea: | http://hdl.handle.net/20.500.12123/19666 https://www.sciencedirect.com/science/article/abs/pii/S2352009424000750 https://doi.org/10.1016/j.geodrs.2024.e00828 |
| _version_ | 1855038088869314560 |
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| author | Lewczuk, Nuria Picone, Liliana Echarte, María Mercedes Alfonso, Cecilia Rizzalli, Roberto Héctor Echarte, Laura |
| author_browse | Alfonso, Cecilia Echarte, Laura Echarte, María Mercedes Lewczuk, Nuria Picone, Liliana Rizzalli, Roberto Héctor |
| author_facet | Lewczuk, Nuria Picone, Liliana Echarte, María Mercedes Alfonso, Cecilia Rizzalli, Roberto Héctor Echarte, Laura |
| author_sort | Lewczuk, Nuria |
| collection | INTA Digital |
| description | Previous studies have recognized the influence of crop cover and agricultural management on variables (soil temperature, soil moisture, and root biomass) that influence soil respiration. However, despite the influence of plant density and row spacing on these variables in the maize crop (Zea mays L.), their impact on soil respiration has received little attention. Thus, the aims of this study were (i) to investigate whether reducing plant density and row spacing influences soil respiration, and (ii) to identify the controlling variables (soil temperature and soil moisture) underlying this response. We conducted field experiments in Balcarce, Argentina, over two seasons. Treatments included (i) maize crops at high plant density (≈8 plants m−2) and narrow rows (0.52 cm, HDN), and (ii) maize crops at low plant density (≈6.5 plants m−2) and wide row spacing (0.70 cm; LDW). Leaf area index (LAI), soil CO2 fluxes, soil superficial temperature, and moisture (characterized by the water-filled pore space, WFPS) were assessed throughout the growing season. Grain yield and cumulative soil CO2 emissions were determined at the final harvest. Major findings relevant to understanding the influence of reducing plant density and wider row spacing on instant CO2 fluxes include: (i) LAI reductions were related to higher superficial soil moisture, which was consistent at LAI ≥ 3; suggesting higher decreases in water uptake than increases in soil evaporation, and in turn (ii) increments in soil moisture were associated with higher CO2 fluxes. While lower plant density and wider row spacing had notable short-term effects on WFPS and soil respiration fluxes, they did not significantly affect cumulative soil respiration throughout the growing season. However, the combination of this practice with low-yield potential genotypes that exhibit low stability to changes in resource availability can increase CO2 emissions per unit of grain yield. These findings contribute to a better understanding of the impacts of management practices on soil respiration and, consequently, on carbon cycling within agricultural ecosystems. |
| format | info:ar-repo/semantics/artículo |
| id | INTA19666 |
| institution | Instituto Nacional de Tecnología Agropecuaria (INTA -Argentina) |
| language | Inglés |
| publishDate | 2024 |
| publishDateRange | 2024 |
| publishDateSort | 2024 |
| publisher | Elsevier |
| publisherStr | Elsevier |
| record_format | dspace |
| spelling | INTA196662024-10-04T10:04:28Z Soil respiration response to reductions in maize plant density and increased row spacing (Southeast pampas, Argentina) Lewczuk, Nuria Picone, Liliana Echarte, María Mercedes Alfonso, Cecilia Rizzalli, Roberto Héctor Echarte, Laura Manejo del Cultivo Maíz Respiración del Suelo Porosidad del Suelo Temperatura del Suelo Argentina Crop Management Maize Soil Respiration Soil Porosity Soil Temperature Región Pampeana Previous studies have recognized the influence of crop cover and agricultural management on variables (soil temperature, soil moisture, and root biomass) that influence soil respiration. However, despite the influence of plant density and row spacing on these variables in the maize crop (Zea mays L.), their impact on soil respiration has received little attention. Thus, the aims of this study were (i) to investigate whether reducing plant density and row spacing influences soil respiration, and (ii) to identify the controlling variables (soil temperature and soil moisture) underlying this response. We conducted field experiments in Balcarce, Argentina, over two seasons. Treatments included (i) maize crops at high plant density (≈8 plants m−2) and narrow rows (0.52 cm, HDN), and (ii) maize crops at low plant density (≈6.5 plants m−2) and wide row spacing (0.70 cm; LDW). Leaf area index (LAI), soil CO2 fluxes, soil superficial temperature, and moisture (characterized by the water-filled pore space, WFPS) were assessed throughout the growing season. Grain yield and cumulative soil CO2 emissions were determined at the final harvest. Major findings relevant to understanding the influence of reducing plant density and wider row spacing on instant CO2 fluxes include: (i) LAI reductions were related to higher superficial soil moisture, which was consistent at LAI ≥ 3; suggesting higher decreases in water uptake than increases in soil evaporation, and in turn (ii) increments in soil moisture were associated with higher CO2 fluxes. While lower plant density and wider row spacing had notable short-term effects on WFPS and soil respiration fluxes, they did not significantly affect cumulative soil respiration throughout the growing season. However, the combination of this practice with low-yield potential genotypes that exhibit low stability to changes in resource availability can increase CO2 emissions per unit of grain yield. These findings contribute to a better understanding of the impacts of management practices on soil respiration and, consequently, on carbon cycling within agricultural ecosystems. EEA Balcarce Fil: Lewczuk, Nuria. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Balcarce; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Innovación para la Producción Agropecuaria y el Desarrollo Sostenible; Argentina Fil: Picone, Liliana. Universidad Nacional de Mar del Plata. Facultad de Ciencias Agrarias; Argentina Fil: Echarte, Maria Mercedes. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Balcarce; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Innovación para la Producción Agropecuaria y el Desarrollo Sostenible; Argentina Fil: Alfonso, Cecilia. Universidad Nacional de Mar del Plata. Facultad de Ciencias Agrarias; Argentina Fil: Rizzalli, Roberto Héctor. Universidad Nacional de Mar del Plata. Facultad de Ciencias Agrarias; Argentina Fil: Echarte, Laura. Universidad Nacional de Mar del Plata. Facultad de Ciencias Agrarias; Argentina Fil: Echarte, Laura. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Balcarce; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Innovación para la Producción Agropecuaria y el Desarrollo Sostenible; Argentina 2024-10-04T09:59:53Z 2024-10-04T09:59:53Z 2024-09 info:ar-repo/semantics/artículo info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://hdl.handle.net/20.500.12123/19666 https://www.sciencedirect.com/science/article/abs/pii/S2352009424000750 2352-0094 https://doi.org/10.1016/j.geodrs.2024.e00828 eng info:eu-repo/semantics/restrictedAccess 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 Elsevier Geoderma Regional 38 : e00828 (September 2024) |
| spellingShingle | Manejo del Cultivo Maíz Respiración del Suelo Porosidad del Suelo Temperatura del Suelo Argentina Crop Management Maize Soil Respiration Soil Porosity Soil Temperature Región Pampeana Lewczuk, Nuria Picone, Liliana Echarte, María Mercedes Alfonso, Cecilia Rizzalli, Roberto Héctor Echarte, Laura Soil respiration response to reductions in maize plant density and increased row spacing (Southeast pampas, Argentina) |
| title | Soil respiration response to reductions in maize plant density and increased row spacing (Southeast pampas, Argentina) |
| title_full | Soil respiration response to reductions in maize plant density and increased row spacing (Southeast pampas, Argentina) |
| title_fullStr | Soil respiration response to reductions in maize plant density and increased row spacing (Southeast pampas, Argentina) |
| title_full_unstemmed | Soil respiration response to reductions in maize plant density and increased row spacing (Southeast pampas, Argentina) |
| title_short | Soil respiration response to reductions in maize plant density and increased row spacing (Southeast pampas, Argentina) |
| title_sort | soil respiration response to reductions in maize plant density and increased row spacing southeast pampas argentina |
| topic | Manejo del Cultivo Maíz Respiración del Suelo Porosidad del Suelo Temperatura del Suelo Argentina Crop Management Maize Soil Respiration Soil Porosity Soil Temperature Región Pampeana |
| url | http://hdl.handle.net/20.500.12123/19666 https://www.sciencedirect.com/science/article/abs/pii/S2352009424000750 https://doi.org/10.1016/j.geodrs.2024.e00828 |
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