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Anthropogenic N input increases global warming potential by awakening the “sleeping” ancient C in deep critical zones

Even a small net increase in soil organic carbon (SOC) mineralization will cause a substantial increase in the atmospheric CO(2) concentration. It is widely recognized that the SOC mineralization within deep critical zones (2 to 12 m depth) is slower and much less influenced by anthropogenic disturb...

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Autores principales: Qin, Shuping, Yuan, Haijing, Hu, Chunsheng, Li, Xiaoxin, Wang, Yuying, Zhang, Yuming, Dong, Wenxu, Clough, Timothy, Luo, Jiafa, Zhou, Shungui, Wrage-Mönnig, Nicole, Ma, Lin, Oenema, Oene
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Association for the Advancement of Science 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9908017/
https://www.ncbi.nlm.nih.gov/pubmed/36753554
http://dx.doi.org/10.1126/sciadv.add0041
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author Qin, Shuping
Yuan, Haijing
Hu, Chunsheng
Li, Xiaoxin
Wang, Yuying
Zhang, Yuming
Dong, Wenxu
Clough, Timothy
Luo, Jiafa
Zhou, Shungui
Wrage-Mönnig, Nicole
Ma, Lin
Oenema, Oene
author_facet Qin, Shuping
Yuan, Haijing
Hu, Chunsheng
Li, Xiaoxin
Wang, Yuying
Zhang, Yuming
Dong, Wenxu
Clough, Timothy
Luo, Jiafa
Zhou, Shungui
Wrage-Mönnig, Nicole
Ma, Lin
Oenema, Oene
author_sort Qin, Shuping
collection PubMed
description Even a small net increase in soil organic carbon (SOC) mineralization will cause a substantial increase in the atmospheric CO(2) concentration. It is widely recognized that the SOC mineralization within deep critical zones (2 to 12 m depth) is slower and much less influenced by anthropogenic disturbance when compared to that of surface soil. Here, we showed that 20 years of nitrogen (N) fertilization enriched a deep critical zone with nitrate, almost doubling the SOC mineralization rate. This result was supported by corresponding increases in the expressions of functional genes typical of recalcitrant SOC degradation and enzyme activities. The CO(2) released and the SOC had a similar (14)C age (6000 to 10,000 years before the present). Our results indicate that N fertilization of crops may enhance CO(2) emissions from deep critical zones to the atmosphere through a previously disregarded mechanism. This provides another reason for markedly improving N management in fertilized agricultural soils.
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spelling pubmed-99080172023-02-09 Anthropogenic N input increases global warming potential by awakening the “sleeping” ancient C in deep critical zones Qin, Shuping Yuan, Haijing Hu, Chunsheng Li, Xiaoxin Wang, Yuying Zhang, Yuming Dong, Wenxu Clough, Timothy Luo, Jiafa Zhou, Shungui Wrage-Mönnig, Nicole Ma, Lin Oenema, Oene Sci Adv Earth, Environmental, Ecological, and Space Sciences Even a small net increase in soil organic carbon (SOC) mineralization will cause a substantial increase in the atmospheric CO(2) concentration. It is widely recognized that the SOC mineralization within deep critical zones (2 to 12 m depth) is slower and much less influenced by anthropogenic disturbance when compared to that of surface soil. Here, we showed that 20 years of nitrogen (N) fertilization enriched a deep critical zone with nitrate, almost doubling the SOC mineralization rate. This result was supported by corresponding increases in the expressions of functional genes typical of recalcitrant SOC degradation and enzyme activities. The CO(2) released and the SOC had a similar (14)C age (6000 to 10,000 years before the present). Our results indicate that N fertilization of crops may enhance CO(2) emissions from deep critical zones to the atmosphere through a previously disregarded mechanism. This provides another reason for markedly improving N management in fertilized agricultural soils. American Association for the Advancement of Science 2023-02-08 /pmc/articles/PMC9908017/ /pubmed/36753554 http://dx.doi.org/10.1126/sciadv.add0041 Text en Copyright © 2023 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution License 4.0 (CC BY). https://creativecommons.org/licenses/by/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution license (https://creativecommons.org/licenses/by/4.0/) , which permits which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Earth, Environmental, Ecological, and Space Sciences
Qin, Shuping
Yuan, Haijing
Hu, Chunsheng
Li, Xiaoxin
Wang, Yuying
Zhang, Yuming
Dong, Wenxu
Clough, Timothy
Luo, Jiafa
Zhou, Shungui
Wrage-Mönnig, Nicole
Ma, Lin
Oenema, Oene
Anthropogenic N input increases global warming potential by awakening the “sleeping” ancient C in deep critical zones
title Anthropogenic N input increases global warming potential by awakening the “sleeping” ancient C in deep critical zones
title_full Anthropogenic N input increases global warming potential by awakening the “sleeping” ancient C in deep critical zones
title_fullStr Anthropogenic N input increases global warming potential by awakening the “sleeping” ancient C in deep critical zones
title_full_unstemmed Anthropogenic N input increases global warming potential by awakening the “sleeping” ancient C in deep critical zones
title_short Anthropogenic N input increases global warming potential by awakening the “sleeping” ancient C in deep critical zones
title_sort anthropogenic n input increases global warming potential by awakening the “sleeping” ancient c in deep critical zones
topic Earth, Environmental, Ecological, and Space Sciences
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9908017/
https://www.ncbi.nlm.nih.gov/pubmed/36753554
http://dx.doi.org/10.1126/sciadv.add0041
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