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Leaching of soils during laboratory incubations does not affect soil organic carbon mineralisation but solubilisation

Laboratory soil incubations provide controlled conditions to investigate carbon and nutrient dynamics; however, they are not free of artefacts. As carbon and nitrogen cycles are tightly linked, we aimed at investigating whether the incubation-induced accumulation of mineral nitrogen (N(min)) biases...

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Autores principales: González-Domínguez, Beatriz, Studer, Mirjam S., Hagedorn, Frank, Niklaus, Pascal A., Abiven, Samuel
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Public Library of Science 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5381879/
https://www.ncbi.nlm.nih.gov/pubmed/28380005
http://dx.doi.org/10.1371/journal.pone.0174725
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author González-Domínguez, Beatriz
Studer, Mirjam S.
Hagedorn, Frank
Niklaus, Pascal A.
Abiven, Samuel
author_facet González-Domínguez, Beatriz
Studer, Mirjam S.
Hagedorn, Frank
Niklaus, Pascal A.
Abiven, Samuel
author_sort González-Domínguez, Beatriz
collection PubMed
description Laboratory soil incubations provide controlled conditions to investigate carbon and nutrient dynamics; however, they are not free of artefacts. As carbon and nitrogen cycles are tightly linked, we aimed at investigating whether the incubation-induced accumulation of mineral nitrogen (N(min)) biases soil organic carbon (SOC) mineralisation. For this, we selected two soils representative of the C:N ratio values found in European temperate forests, and applied two incubation systems: ‘closed’ beakers and ‘open’ microlysimeters. The latter allowed leaching the soil samples during the incubation. By the end of the 121-day experiment, the low C:N soil significantly accumulated more N(min) in beakers (5.12 g kg(-1) OC) than in microlysimeters (3.00 g kg(-1) OC) but there was not a significant difference in SOC mineralisation at any point of the experiment. On the other hand, N(min) did not accumulate in the high C:N soil but, by the end of the experiment, leaching had promoted 33.9% more SOC solubilisation than beakers. Therefore, we did not find evidence that incubation experiments introduce a bias on SOC mineralisation. This outcome strengthens results from soil incubation studies.
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spelling pubmed-53818792017-04-19 Leaching of soils during laboratory incubations does not affect soil organic carbon mineralisation but solubilisation González-Domínguez, Beatriz Studer, Mirjam S. Hagedorn, Frank Niklaus, Pascal A. Abiven, Samuel PLoS One Research Article Laboratory soil incubations provide controlled conditions to investigate carbon and nutrient dynamics; however, they are not free of artefacts. As carbon and nitrogen cycles are tightly linked, we aimed at investigating whether the incubation-induced accumulation of mineral nitrogen (N(min)) biases soil organic carbon (SOC) mineralisation. For this, we selected two soils representative of the C:N ratio values found in European temperate forests, and applied two incubation systems: ‘closed’ beakers and ‘open’ microlysimeters. The latter allowed leaching the soil samples during the incubation. By the end of the 121-day experiment, the low C:N soil significantly accumulated more N(min) in beakers (5.12 g kg(-1) OC) than in microlysimeters (3.00 g kg(-1) OC) but there was not a significant difference in SOC mineralisation at any point of the experiment. On the other hand, N(min) did not accumulate in the high C:N soil but, by the end of the experiment, leaching had promoted 33.9% more SOC solubilisation than beakers. Therefore, we did not find evidence that incubation experiments introduce a bias on SOC mineralisation. This outcome strengthens results from soil incubation studies. Public Library of Science 2017-04-05 /pmc/articles/PMC5381879/ /pubmed/28380005 http://dx.doi.org/10.1371/journal.pone.0174725 Text en © 2017 González-Domínguez et al http://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
spellingShingle Research Article
González-Domínguez, Beatriz
Studer, Mirjam S.
Hagedorn, Frank
Niklaus, Pascal A.
Abiven, Samuel
Leaching of soils during laboratory incubations does not affect soil organic carbon mineralisation but solubilisation
title Leaching of soils during laboratory incubations does not affect soil organic carbon mineralisation but solubilisation
title_full Leaching of soils during laboratory incubations does not affect soil organic carbon mineralisation but solubilisation
title_fullStr Leaching of soils during laboratory incubations does not affect soil organic carbon mineralisation but solubilisation
title_full_unstemmed Leaching of soils during laboratory incubations does not affect soil organic carbon mineralisation but solubilisation
title_short Leaching of soils during laboratory incubations does not affect soil organic carbon mineralisation but solubilisation
title_sort leaching of soils during laboratory incubations does not affect soil organic carbon mineralisation but solubilisation
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5381879/
https://www.ncbi.nlm.nih.gov/pubmed/28380005
http://dx.doi.org/10.1371/journal.pone.0174725
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