Nitrogen deficiency in maize fields of the Southern Pampas does not affect kernel number but reduces weight per kernel
Nitrogen (N) requirement of maize has been increasing over the past decades, but there has been a lack ofadjustment in fertilization management practices across different regions in Argentina. The higher N requirementin modern hybrids is associated with a higher post-flowering N accumulation. Additi...
| Main Authors: | , , , , |
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| Format: | info:ar-repo/semantics/artículo |
| Language: | Inglés |
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Elsevier
2024
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| Subjects: | |
| Online Access: | http://hdl.handle.net/20.500.12123/18572 https://www.sciencedirect.com/science/article/abs/pii/S0378429024001473 https://doi.org/10.1016/j.fcr.2024.109394 |
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| author | Moisés Domínguez, Clara Andrade, Fernando Hector Monzón, Juan Pablo Reussi Calvo, Nahuel Ignacio Cerrudo, Aníbal Alejandro |
| author_browse | Andrade, Fernando Hector Cerrudo, Aníbal Alejandro Moisés Domínguez, Clara Monzón, Juan Pablo Reussi Calvo, Nahuel Ignacio |
| author_facet | Moisés Domínguez, Clara Andrade, Fernando Hector Monzón, Juan Pablo Reussi Calvo, Nahuel Ignacio Cerrudo, Aníbal Alejandro |
| author_sort | Moisés Domínguez, Clara |
| collection | INTA Digital |
| description | Nitrogen (N) requirement of maize has been increasing over the past decades, but there has been a lack ofadjustment in fertilization management practices across different regions in Argentina. The higher N requirementin modern hybrids is associated with a higher post-flowering N accumulation. Additionally, soil fertility in theArgentina Pampas has consistently decreased in recent years. Whether the effects of N deficiency are expressed inthe post-flowering period is still unclear at field level. The objective of this work was to quantify the yieldreduction attributed to N deficiency and to identify the physiological basis of this effect at the field level fortypical high-tech farms across the south-eastern Pampas of Argentina. Nineteen experiments were conductedduring the 2020/2021 growing season in the south-eastern Pampas, evaluating two N managements i) Farmers’N level; ii) High N input. Results showed that the additional N input increased grain yield by an average of 6.4%(average grain yield difference of 712 kg ha− 1). Weight per kernel was the only yield component that respondedto N fertilization. Farmers’ N management did not affect N accumulation or growth-related variables such as leafarea index, green leaves per plant, PAR interception, nitrogen sufficiency index until flowering, but the farmers’N level reduced these variables during the grain filling period leading to differences in aerial biomass and Naccumulated at physiological maturity. Farmers’ N level led to decreased post-flowering N uptake during grainfilling period, which reduced the photosynthetic capacity of the canopy. These findings suggest that N management strategies and models need to be reviewed for high-tech maize systems. |
| format | info:ar-repo/semantics/artículo |
| id | INTA18572 |
| institution | Instituto Nacional de Tecnología Agropecuaria (INTA -Argentina) |
| language | Inglés |
| publishDate | 2024 |
| publishDateRange | 2024 |
| publishDateSort | 2024 |
| publisher | Elsevier |
| publisherStr | Elsevier |
| record_format | dspace |
| spelling | INTA185722024-07-19T10:46:19Z Nitrogen deficiency in maize fields of the Southern Pampas does not affect kernel number but reduces weight per kernel Moisés Domínguez, Clara Andrade, Fernando Hector Monzón, Juan Pablo Reussi Calvo, Nahuel Ignacio Cerrudo, Aníbal Alejandro Nitrógeno Maíz Grano Período de Crecimiento Rendimiento Nitrogen Maize Grain Growth Period Yields Kernels On-farm Research Germen Investigación en la Finca Nitrogen (N) requirement of maize has been increasing over the past decades, but there has been a lack ofadjustment in fertilization management practices across different regions in Argentina. The higher N requirementin modern hybrids is associated with a higher post-flowering N accumulation. Additionally, soil fertility in theArgentina Pampas has consistently decreased in recent years. Whether the effects of N deficiency are expressed inthe post-flowering period is still unclear at field level. The objective of this work was to quantify the yieldreduction attributed to N deficiency and to identify the physiological basis of this effect at the field level fortypical high-tech farms across the south-eastern Pampas of Argentina. Nineteen experiments were conductedduring the 2020/2021 growing season in the south-eastern Pampas, evaluating two N managements i) Farmers’N level; ii) High N input. Results showed that the additional N input increased grain yield by an average of 6.4%(average grain yield difference of 712 kg ha− 1). Weight per kernel was the only yield component that respondedto N fertilization. Farmers’ N management did not affect N accumulation or growth-related variables such as leafarea index, green leaves per plant, PAR interception, nitrogen sufficiency index until flowering, but the farmers’N level reduced these variables during the grain filling period leading to differences in aerial biomass and Naccumulated at physiological maturity. Farmers’ N level led to decreased post-flowering N uptake during grainfilling period, which reduced the photosynthetic capacity of the canopy. These findings suggest that N management strategies and models need to be reviewed for high-tech maize systems. EEA Balcarce Fil: Moisés Domínguez, Clara. Universidad Nacional de Mar del Plata. Facultad de Ciencias Agrarias; Argentina Fil: Moisés Domínguez, Clara. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Andrade, Fernando Héctor. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Balcarce; Argentina Fil: Andrade, Fernando Héctor. Universidad Nacional de Mar del Plata. Facultad de Ciencias Agrarias; Argentina Fil: Andrade, Fernando Héctor. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Monzón, Juan Pablo. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Monzón, Juan Pablo. University of Nebraska-Lincoln. Department of Agronomy and Horticulture; Estados Unidos Fil: Reussi Calvo, Nahuel Ignacio. Universidad Nacional de Mar del Plata. Facultad de Ciencias Agrarias; Argentina Fil: Reussi Calvo, Nahuel Ignacio. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Cerrudo, Aníbal Alejandro. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Balcarce; Argentina Fil: Cerrudo, Aníbal Alejandro. Universidad Nacional de Mar del Plata. Facultad de Ciencias Agrarias; Argentina Fil: Cerrudo, Aníbal Alejandro. University of Minnesota. Department of Agronomy and Plant Genetics; Estados Unidos 2024-07-19T10:39:07Z 2024-07-19T10:39:07Z 2024-05 info:ar-repo/semantics/artículo info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://hdl.handle.net/20.500.12123/18572 https://www.sciencedirect.com/science/article/abs/pii/S0378429024001473 0378-4290 https://doi.org/10.1016/j.fcr.2024.109394 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 Field Crops Research 312 : 109394 (May 2024) |
| spellingShingle | Nitrógeno Maíz Grano Período de Crecimiento Rendimiento Nitrogen Maize Grain Growth Period Yields Kernels On-farm Research Germen Investigación en la Finca Moisés Domínguez, Clara Andrade, Fernando Hector Monzón, Juan Pablo Reussi Calvo, Nahuel Ignacio Cerrudo, Aníbal Alejandro Nitrogen deficiency in maize fields of the Southern Pampas does not affect kernel number but reduces weight per kernel |
| title | Nitrogen deficiency in maize fields of the Southern Pampas does not affect kernel number but reduces weight per kernel |
| title_full | Nitrogen deficiency in maize fields of the Southern Pampas does not affect kernel number but reduces weight per kernel |
| title_fullStr | Nitrogen deficiency in maize fields of the Southern Pampas does not affect kernel number but reduces weight per kernel |
| title_full_unstemmed | Nitrogen deficiency in maize fields of the Southern Pampas does not affect kernel number but reduces weight per kernel |
| title_short | Nitrogen deficiency in maize fields of the Southern Pampas does not affect kernel number but reduces weight per kernel |
| title_sort | nitrogen deficiency in maize fields of the southern pampas does not affect kernel number but reduces weight per kernel |
| topic | Nitrógeno Maíz Grano Período de Crecimiento Rendimiento Nitrogen Maize Grain Growth Period Yields Kernels On-farm Research Germen Investigación en la Finca |
| url | http://hdl.handle.net/20.500.12123/18572 https://www.sciencedirect.com/science/article/abs/pii/S0378429024001473 https://doi.org/10.1016/j.fcr.2024.109394 |
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