The allometric relationships between biomass and nitrogen of vegetative organs affect crop N status in maize at silking stage
In maize (Zea mays, L.) changes in the partitioning of biomass (W) and nitrogen (N) between organs linked to photosynthetically active tissues, such as leaves (with high N concentration, %N) and organs related to supporting functions, such as stems (with low %N) at silking stage, could modify the di...
| Main Authors: | , , , , |
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| Format: | Artículo |
| Language: | Inglés |
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Elsevier
2023
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| Online Access: | http://hdl.handle.net/20.500.12123/14087 https://www.sciencedirect.com/science/article/abs/pii/S0378429023000540 https://doi.org/10.1016/j.fcr.2023.108861 |
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| author | Maltese, Nicolás Maddonni, Gustavo Angel Melchiori, Ricardo Jose Ciampitti, Ignacio A. Caviglia, Octavio |
| author_browse | Caviglia, Octavio Ciampitti, Ignacio A. Maddonni, Gustavo Angel Maltese, Nicolás Melchiori, Ricardo Jose |
| author_facet | Maltese, Nicolás Maddonni, Gustavo Angel Melchiori, Ricardo Jose Ciampitti, Ignacio A. Caviglia, Octavio |
| author_sort | Maltese, Nicolás |
| collection | INTA Digital |
| description | In maize (Zea mays, L.) changes in the partitioning of biomass (W) and nitrogen (N) between organs linked to photosynthetically active tissues, such as leaves (with high N concentration, %N) and organs related to supporting functions, such as stems (with low %N) at silking stage, could modify the diagnosis of crop N status (i.e., N nutrition index, NNI) for fertilizer N recommendations. To test this hypothesis we used a database of maize measurements performed at silking stage of crops cultivated under different N fertilization rates, plant densities, hybrids, and sowing dates, to investigate i) the allometric relationships between %N and W of leaves (%NL and WL) and stems (%NS and WS), ii) changes in N uptake in vegetative organs for crops with low (<6700 kg ha−1) and high (>6700 kg ha−1) crop W and contrasting NNIs, iii) the responses of crop W at silking stage to N fertilization relative to responses of WL, WS, %NL and %NS, and iv) the inclusion of the %NL/%NS ratio in a predictive model of relative grain yield based on crop NNI at silking. Variations of WS (from 2143 to 10,067 kg ha−1) were greater than those of WL (from 1010 to 4107 kg ha−1), whereas the values of WL/WS ratio (for low W crops) and leaf/stem ratio for N uptake (for both high and low W crops) were lower for NNI> 1.1 than for NNI< 0.9, reflecting the key role of stems as N storage organs when N is non-limiting. Changes in WS largely modulate the response of crop W to N fertilization, while changes in %NL largely modulated the response of crop %N to N fertilization for high W crops. Optimal crop N status (i.e., NNI=∼1) was attained with a greater %NL/%NS ratio for high (2.0) than for low (1.2) W crops, suggesting that this allometric ratio should be taken into account at this crop growth stage, particularly for low crop W. Accordingly, the prediction of relative grain yield based on NNI at silking was improved by the inclusion of %NL/%NS. Therefore, our results are useful to better understand the response of maize crop W, grain yield, and crop %N (for leaves and stems) to late N fertilization, adding valuable insights to improve current NNI-based N diagnostic tools. |
| format | Artículo |
| id | INTA14087 |
| institution | Instituto Nacional de Tecnología Agropecuaria (INTA -Argentina) |
| language | Inglés |
| publishDate | 2023 |
| publishDateRange | 2023 |
| publishDateSort | 2023 |
| publisher | Elsevier |
| publisherStr | Elsevier |
| record_format | dspace |
| spelling | INTA140872023-02-27T19:25:37Z The allometric relationships between biomass and nitrogen of vegetative organs affect crop N status in maize at silking stage Maltese, Nicolás Maddonni, Gustavo Angel Melchiori, Ricardo Jose Ciampitti, Ignacio A. Caviglia, Octavio Maíz Biomasa Nitrógeno Alometría Hojas Tallos Maize Biomass Nitrogen Allometry Leaves Stems In maize (Zea mays, L.) changes in the partitioning of biomass (W) and nitrogen (N) between organs linked to photosynthetically active tissues, such as leaves (with high N concentration, %N) and organs related to supporting functions, such as stems (with low %N) at silking stage, could modify the diagnosis of crop N status (i.e., N nutrition index, NNI) for fertilizer N recommendations. To test this hypothesis we used a database of maize measurements performed at silking stage of crops cultivated under different N fertilization rates, plant densities, hybrids, and sowing dates, to investigate i) the allometric relationships between %N and W of leaves (%NL and WL) and stems (%NS and WS), ii) changes in N uptake in vegetative organs for crops with low (<6700 kg ha−1) and high (>6700 kg ha−1) crop W and contrasting NNIs, iii) the responses of crop W at silking stage to N fertilization relative to responses of WL, WS, %NL and %NS, and iv) the inclusion of the %NL/%NS ratio in a predictive model of relative grain yield based on crop NNI at silking. Variations of WS (from 2143 to 10,067 kg ha−1) were greater than those of WL (from 1010 to 4107 kg ha−1), whereas the values of WL/WS ratio (for low W crops) and leaf/stem ratio for N uptake (for both high and low W crops) were lower for NNI> 1.1 than for NNI< 0.9, reflecting the key role of stems as N storage organs when N is non-limiting. Changes in WS largely modulate the response of crop W to N fertilization, while changes in %NL largely modulated the response of crop %N to N fertilization for high W crops. Optimal crop N status (i.e., NNI=∼1) was attained with a greater %NL/%NS ratio for high (2.0) than for low (1.2) W crops, suggesting that this allometric ratio should be taken into account at this crop growth stage, particularly for low crop W. Accordingly, the prediction of relative grain yield based on NNI at silking was improved by the inclusion of %NL/%NS. Therefore, our results are useful to better understand the response of maize crop W, grain yield, and crop %N (for leaves and stems) to late N fertilization, adding valuable insights to improve current NNI-based N diagnostic tools. EEA Paraná Fil: Maltese, Nicolás. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Maltese, Nicolás. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Paraná; Argentina. Fil: Maltese, Nicolás. Universidad Nacional de Entre Ríos. Facultad de Ciencias Agropecuarias; Argentina Fil: Maddonni, Gustavo Angel. Universidad de Buenos Aires. Facultad de Agronomía. Cátedra de Cerealicultura; Argentina Fil: Maddonni, Gustavo Angel. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Fisiología y Ecología Vinculado a la Agricultura; Argentina Fil: Maddonni, Gustavo Angel. Universidad de Buenos Aires. Facultad de Agronomía. Instituto de Fisiología y Ecología Vinculado a la Agricultura; Argentina Fil: Melchiori, Ricardo Jose. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Paraná; Argentina. Fil: Ciampitti, Ignacio. Kansas State University. Throckmorton Plant Science Center. Department of Agronomy; Estados Unidos Fil: Caviglia, Octavio. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Caviglia, Octavio. Universidad Nacional de Entre Ríos. Facultad de Ciencias Agropecuarias; Argentina 2023-02-27T19:23:02Z 2023-02-27T19:23:02Z 2023-04 info:ar-repo/semantics/artículo info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://hdl.handle.net/20.500.12123/14087 https://www.sciencedirect.com/science/article/abs/pii/S0378429023000540 0378-4290 1872-6852 https://doi.org/10.1016/j.fcr.2023.108861 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 294 : 108861. (April 2023) |
| spellingShingle | Maíz Biomasa Nitrógeno Alometría Hojas Tallos Maize Biomass Nitrogen Allometry Leaves Stems Maltese, Nicolás Maddonni, Gustavo Angel Melchiori, Ricardo Jose Ciampitti, Ignacio A. Caviglia, Octavio The allometric relationships between biomass and nitrogen of vegetative organs affect crop N status in maize at silking stage |
| title | The allometric relationships between biomass and nitrogen of vegetative organs affect crop N status in maize at silking stage |
| title_full | The allometric relationships between biomass and nitrogen of vegetative organs affect crop N status in maize at silking stage |
| title_fullStr | The allometric relationships between biomass and nitrogen of vegetative organs affect crop N status in maize at silking stage |
| title_full_unstemmed | The allometric relationships between biomass and nitrogen of vegetative organs affect crop N status in maize at silking stage |
| title_short | The allometric relationships between biomass and nitrogen of vegetative organs affect crop N status in maize at silking stage |
| title_sort | allometric relationships between biomass and nitrogen of vegetative organs affect crop n status in maize at silking stage |
| topic | Maíz Biomasa Nitrógeno Alometría Hojas Tallos Maize Biomass Nitrogen Allometry Leaves Stems |
| url | http://hdl.handle.net/20.500.12123/14087 https://www.sciencedirect.com/science/article/abs/pii/S0378429023000540 https://doi.org/10.1016/j.fcr.2023.108861 |
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