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Conventional analysis methods underestimate the plant-available pools of calcium, magnesium and potassium in forest soils

The plant-available pools of calcium, magnesium and potassium are assumed to be stored in the soil as exchangeable cations adsorbed on the cation exchange complex. In numerous forest ecosystems, despite very low plant-available pools, elevated forest productivities are sustained. We hypothesize that...

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Autores principales: Jérémie, Bel, Arnaud, Legout, Laurent, Saint-André, Steven, J. Hall, Stefan, Löfgren, Jean-Paul, Laclau, van der Heijden Gregory
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7519158/
https://www.ncbi.nlm.nih.gov/pubmed/32973312
http://dx.doi.org/10.1038/s41598-020-72741-w
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author Jérémie, Bel
Arnaud, Legout
Laurent, Saint-André
Steven, J. Hall
Stefan, Löfgren
Jean-Paul, Laclau
van der Heijden Gregory
author_facet Jérémie, Bel
Arnaud, Legout
Laurent, Saint-André
Steven, J. Hall
Stefan, Löfgren
Jean-Paul, Laclau
van der Heijden Gregory
author_sort Jérémie, Bel
collection PubMed
description The plant-available pools of calcium, magnesium and potassium are assumed to be stored in the soil as exchangeable cations adsorbed on the cation exchange complex. In numerous forest ecosystems, despite very low plant-available pools, elevated forest productivities are sustained. We hypothesize that trees access nutrient sources in the soil that are currently unaccounted by conventional soil analysis methods. We carried out an isotopic dilution assay to quantify the plant-available pools of calcium, magnesium and potassium and trace the soil phases that support these pools in 143 individual soil samples covering 3 climatic zones and 5 different soil types. For 81%, 87% and 90% of the soil samples (respectively for Ca, Mg and K), the plant-available pools measured by isotopic dilution were greater than the conventional exchangeable pool. This additional pool is most likely supported by secondary non-crystalline mineral phases in interaction with soil organic matter and represents in many cases (respectively 43%, 27% and 47% of the soil samples) a substantial amount of plant-available nutrient cations (50% greater than the conventional exchangeable pools) that is likely to play an essential role in the biogeochemical functioning of forest ecosystems, in particular when the resources of Ca, Mg and K are low.
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spelling pubmed-75191582020-09-29 Conventional analysis methods underestimate the plant-available pools of calcium, magnesium and potassium in forest soils Jérémie, Bel Arnaud, Legout Laurent, Saint-André Steven, J. Hall Stefan, Löfgren Jean-Paul, Laclau van der Heijden Gregory Sci Rep Article The plant-available pools of calcium, magnesium and potassium are assumed to be stored in the soil as exchangeable cations adsorbed on the cation exchange complex. In numerous forest ecosystems, despite very low plant-available pools, elevated forest productivities are sustained. We hypothesize that trees access nutrient sources in the soil that are currently unaccounted by conventional soil analysis methods. We carried out an isotopic dilution assay to quantify the plant-available pools of calcium, magnesium and potassium and trace the soil phases that support these pools in 143 individual soil samples covering 3 climatic zones and 5 different soil types. For 81%, 87% and 90% of the soil samples (respectively for Ca, Mg and K), the plant-available pools measured by isotopic dilution were greater than the conventional exchangeable pool. This additional pool is most likely supported by secondary non-crystalline mineral phases in interaction with soil organic matter and represents in many cases (respectively 43%, 27% and 47% of the soil samples) a substantial amount of plant-available nutrient cations (50% greater than the conventional exchangeable pools) that is likely to play an essential role in the biogeochemical functioning of forest ecosystems, in particular when the resources of Ca, Mg and K are low. Nature Publishing Group UK 2020-09-24 /pmc/articles/PMC7519158/ /pubmed/32973312 http://dx.doi.org/10.1038/s41598-020-72741-w Text en © The Author(s) 2020 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/.
spellingShingle Article
Jérémie, Bel
Arnaud, Legout
Laurent, Saint-André
Steven, J. Hall
Stefan, Löfgren
Jean-Paul, Laclau
van der Heijden Gregory
Conventional analysis methods underestimate the plant-available pools of calcium, magnesium and potassium in forest soils
title Conventional analysis methods underestimate the plant-available pools of calcium, magnesium and potassium in forest soils
title_full Conventional analysis methods underestimate the plant-available pools of calcium, magnesium and potassium in forest soils
title_fullStr Conventional analysis methods underestimate the plant-available pools of calcium, magnesium and potassium in forest soils
title_full_unstemmed Conventional analysis methods underestimate the plant-available pools of calcium, magnesium and potassium in forest soils
title_short Conventional analysis methods underestimate the plant-available pools of calcium, magnesium and potassium in forest soils
title_sort conventional analysis methods underestimate the plant-available pools of calcium, magnesium and potassium in forest soils
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7519158/
https://www.ncbi.nlm.nih.gov/pubmed/32973312
http://dx.doi.org/10.1038/s41598-020-72741-w
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