Stability of buried carbon in deep-ploughed forest and cropland soils - implications for carbon stocks

Abstract Accumulation of soil organic carbon (SOC) may play a key role in climate change mitigation and adaptation. In particular, subsoil provides a great potential for additional SOC storage due to the assumed higher stability of subsoil SOC. The fastest way in which SOC reaches the subsoil is via...

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Autores principales:	Viridiana Alcántara, Axel Don, Lars Vesterdal, Reinhard Well, Rolf Nieder
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/980b971a965d4ee4965735f97bffa777
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spelling	oai:doaj.org-article:980b971a965d4ee4965735f97bffa7772021-12-02T16:06:40ZStability of buried carbon in deep-ploughed forest and cropland soils - implications for carbon stocks10.1038/s41598-017-05501-y2045-2322https://doaj.org/article/980b971a965d4ee4965735f97bffa7772017-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-05501-yhttps://doaj.org/toc/2045-2322Abstract Accumulation of soil organic carbon (SOC) may play a key role in climate change mitigation and adaptation. In particular, subsoil provides a great potential for additional SOC storage due to the assumed higher stability of subsoil SOC. The fastest way in which SOC reaches the subsoil is via burial, e.g. via erosion or deep ploughing. We assessed the effect of active SOC burial through deep ploughing on long-term SOC stocks and stability in forest and cropland subsoil. After 25–48 years, deep-ploughed subsoil contained significantly more SOC than reference subsoils, in both forest soil (+48%) and cropland (+67%). However, total SOC stocks down to 100 cm in deep-ploughed soil were greater than in reference soil only in cropland, and not in forests. This was explained by slower SOC accumulation in topsoil of deep-ploughed forest soils. Buried SOC was on average 32% more stable than reference SOC, as revealed by long-term incubation. Moreover, buried subsoil SOC had higher apparent radiocarbon ages indicating that it is largely isolated from exchange with atmospheric CO2. We concluded that deep ploughing increased subsoil SOC storage and that the higher subsoil SOC stability is not only a result of selective preservation of more stable SOC fractions.Viridiana AlcántaraAxel DonLars VesterdalReinhard WellRolf NiederNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-12 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Viridiana Alcántara Axel Don Lars Vesterdal Reinhard Well Rolf Nieder Stability of buried carbon in deep-ploughed forest and cropland soils - implications for carbon stocks
description	Abstract Accumulation of soil organic carbon (SOC) may play a key role in climate change mitigation and adaptation. In particular, subsoil provides a great potential for additional SOC storage due to the assumed higher stability of subsoil SOC. The fastest way in which SOC reaches the subsoil is via burial, e.g. via erosion or deep ploughing. We assessed the effect of active SOC burial through deep ploughing on long-term SOC stocks and stability in forest and cropland subsoil. After 25–48 years, deep-ploughed subsoil contained significantly more SOC than reference subsoils, in both forest soil (+48%) and cropland (+67%). However, total SOC stocks down to 100 cm in deep-ploughed soil were greater than in reference soil only in cropland, and not in forests. This was explained by slower SOC accumulation in topsoil of deep-ploughed forest soils. Buried SOC was on average 32% more stable than reference SOC, as revealed by long-term incubation. Moreover, buried subsoil SOC had higher apparent radiocarbon ages indicating that it is largely isolated from exchange with atmospheric CO2. We concluded that deep ploughing increased subsoil SOC storage and that the higher subsoil SOC stability is not only a result of selective preservation of more stable SOC fractions.
format	article
author	Viridiana Alcántara Axel Don Lars Vesterdal Reinhard Well Rolf Nieder
author_facet	Viridiana Alcántara Axel Don Lars Vesterdal Reinhard Well Rolf Nieder
author_sort	Viridiana Alcántara
title	Stability of buried carbon in deep-ploughed forest and cropland soils - implications for carbon stocks
title_short	Stability of buried carbon in deep-ploughed forest and cropland soils - implications for carbon stocks
title_full	Stability of buried carbon in deep-ploughed forest and cropland soils - implications for carbon stocks
title_fullStr	Stability of buried carbon in deep-ploughed forest and cropland soils - implications for carbon stocks
title_full_unstemmed	Stability of buried carbon in deep-ploughed forest and cropland soils - implications for carbon stocks
title_sort	stability of buried carbon in deep-ploughed forest and cropland soils - implications for carbon stocks
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/980b971a965d4ee4965735f97bffa777
work_keys_str_mv	AT viridianaalcantara stabilityofburiedcarbonindeepploughedforestandcroplandsoilsimplicationsforcarbonstocks AT axeldon stabilityofburiedcarbonindeepploughedforestandcroplandsoilsimplicationsforcarbonstocks AT larsvesterdal stabilityofburiedcarbonindeepploughedforestandcroplandsoilsimplicationsforcarbonstocks AT reinhardwell stabilityofburiedcarbonindeepploughedforestandcroplandsoilsimplicationsforcarbonstocks AT rolfnieder stabilityofburiedcarbonindeepploughedforestandcroplandsoilsimplicationsforcarbonstocks
_version_	1718384917110325248

Stability of buried carbon in deep-ploughed forest and cropland soils - implications for carbon stocks

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