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High N availability decreases N uptake and yield under limited water availability in maize
Water and nitrogen (N) are the most limiting factors to plant productivity globally, but we lack a critical understanding of how water availability impacts N dynamics in agricultural systems. Plant N requirements are particularly uncertain when water is limited because of the interactive effect of w...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2023
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10471730/ https://www.ncbi.nlm.nih.gov/pubmed/37652935 http://dx.doi.org/10.1038/s41598-023-40459-0 |
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author | Flynn, Nora E. Comas, Louise H. Stewart, Catherine E. Fonte, Steven J. |
author_facet | Flynn, Nora E. Comas, Louise H. Stewart, Catherine E. Fonte, Steven J. |
author_sort | Flynn, Nora E. |
collection | PubMed |
description | Water and nitrogen (N) are the most limiting factors to plant productivity globally, but we lack a critical understanding of how water availability impacts N dynamics in agricultural systems. Plant N requirements are particularly uncertain when water is limited because of the interactive effect of water and N on plant growth, N demand, and plant uptake. We investigated impacts of N application and water availability on plant growth and N movement, including above and belowground growth, water productivity, N productivity, N uptake, N recovery, and greenhouse gas emissions within a semi-arid system in northeastern Colorado, USA. Moderately high soil N availability depressed grain yield and shoot growth under both limited and full water availability, despite no indication of physical toxicity, and came with additional risk of deleterious N losses. Under low N availability, plant N concentrations in aboveground tissues showed greater recovery of N than what was applied in the low N treatments under both full and limited water availability. This enhanced recovery underscores the need to better understand both plant soil foraging and processes governing resource availability under these conditions. Finally, limited water availability reduced N uptake across all N treatments and left 30% more soil nitrate (NO(3)(−)) deep in the soil profile at the end of the season than under full water availability. Our results show that plant N needs are not linearly related to water use and emphasize the need for an integrated understanding of water and N interactions, plant foraging for these resources, and the dynamics of processes that make N available to plants. |
format | Online Article Text |
id | pubmed-10471730 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2023 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-104717302023-09-02 High N availability decreases N uptake and yield under limited water availability in maize Flynn, Nora E. Comas, Louise H. Stewart, Catherine E. Fonte, Steven J. Sci Rep Article Water and nitrogen (N) are the most limiting factors to plant productivity globally, but we lack a critical understanding of how water availability impacts N dynamics in agricultural systems. Plant N requirements are particularly uncertain when water is limited because of the interactive effect of water and N on plant growth, N demand, and plant uptake. We investigated impacts of N application and water availability on plant growth and N movement, including above and belowground growth, water productivity, N productivity, N uptake, N recovery, and greenhouse gas emissions within a semi-arid system in northeastern Colorado, USA. Moderately high soil N availability depressed grain yield and shoot growth under both limited and full water availability, despite no indication of physical toxicity, and came with additional risk of deleterious N losses. Under low N availability, plant N concentrations in aboveground tissues showed greater recovery of N than what was applied in the low N treatments under both full and limited water availability. This enhanced recovery underscores the need to better understand both plant soil foraging and processes governing resource availability under these conditions. Finally, limited water availability reduced N uptake across all N treatments and left 30% more soil nitrate (NO(3)(−)) deep in the soil profile at the end of the season than under full water availability. Our results show that plant N needs are not linearly related to water use and emphasize the need for an integrated understanding of water and N interactions, plant foraging for these resources, and the dynamics of processes that make N available to plants. Nature Publishing Group UK 2023-08-31 /pmc/articles/PMC10471730/ /pubmed/37652935 http://dx.doi.org/10.1038/s41598-023-40459-0 Text en © This is a U.S. Government work and not under copyright protection in the US; foreign copyright protection may apply 2023 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) . |
spellingShingle | Article Flynn, Nora E. Comas, Louise H. Stewart, Catherine E. Fonte, Steven J. High N availability decreases N uptake and yield under limited water availability in maize |
title | High N availability decreases N uptake and yield under limited water availability in maize |
title_full | High N availability decreases N uptake and yield under limited water availability in maize |
title_fullStr | High N availability decreases N uptake and yield under limited water availability in maize |
title_full_unstemmed | High N availability decreases N uptake and yield under limited water availability in maize |
title_short | High N availability decreases N uptake and yield under limited water availability in maize |
title_sort | high n availability decreases n uptake and yield under limited water availability in maize |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10471730/ https://www.ncbi.nlm.nih.gov/pubmed/37652935 http://dx.doi.org/10.1038/s41598-023-40459-0 |
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