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Critical carbon input to maintain current soil organic carbon stocks in global wheat systems

Soil organic carbon (SOC) dynamics in croplands is a crucial component of global carbon (C) cycle. Depending on local environmental conditions and management practices, typical C input is generally required to reduce or reverse C loss in agricultural soils. No studies have quantified the critical C...

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Autores principales: Wang, Guocheng, Luo, Zhongkui, Han, Pengfei, Chen, Huansheng, Xu, Jingjing
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4725856/
https://www.ncbi.nlm.nih.gov/pubmed/26759192
http://dx.doi.org/10.1038/srep19327
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author Wang, Guocheng
Luo, Zhongkui
Han, Pengfei
Chen, Huansheng
Xu, Jingjing
author_facet Wang, Guocheng
Luo, Zhongkui
Han, Pengfei
Chen, Huansheng
Xu, Jingjing
author_sort Wang, Guocheng
collection PubMed
description Soil organic carbon (SOC) dynamics in croplands is a crucial component of global carbon (C) cycle. Depending on local environmental conditions and management practices, typical C input is generally required to reduce or reverse C loss in agricultural soils. No studies have quantified the critical C input for maintaining SOC at global scale with high resolution. Such information will provide a baseline map for assessing soil C dynamics under potential changes in management practices and climate, and thus enable development of management strategies to reduce C footprint from farm to regional scales. We used the soil C model RothC to simulate the critical C input rates needed to maintain existing soil C level at 0.1° × 0.1° resolution in global wheat systems. On average, the critical C input was estimated to be 2.0 Mg C ha(−1) yr(−1), with large spatial variability depending on local soil and climatic conditions. Higher C inputs are required in wheat system of central United States and western Europe, mainly due to the higher current soil C stocks present in these regions. The critical C input could be effectively estimated using a summary model driven by current SOC level, mean annual temperature, precipitation, and soil clay content.
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spelling pubmed-47258562016-01-28 Critical carbon input to maintain current soil organic carbon stocks in global wheat systems Wang, Guocheng Luo, Zhongkui Han, Pengfei Chen, Huansheng Xu, Jingjing Sci Rep Article Soil organic carbon (SOC) dynamics in croplands is a crucial component of global carbon (C) cycle. Depending on local environmental conditions and management practices, typical C input is generally required to reduce or reverse C loss in agricultural soils. No studies have quantified the critical C input for maintaining SOC at global scale with high resolution. Such information will provide a baseline map for assessing soil C dynamics under potential changes in management practices and climate, and thus enable development of management strategies to reduce C footprint from farm to regional scales. We used the soil C model RothC to simulate the critical C input rates needed to maintain existing soil C level at 0.1° × 0.1° resolution in global wheat systems. On average, the critical C input was estimated to be 2.0 Mg C ha(−1) yr(−1), with large spatial variability depending on local soil and climatic conditions. Higher C inputs are required in wheat system of central United States and western Europe, mainly due to the higher current soil C stocks present in these regions. The critical C input could be effectively estimated using a summary model driven by current SOC level, mean annual temperature, precipitation, and soil clay content. Nature Publishing Group 2016-01-13 /pmc/articles/PMC4725856/ /pubmed/26759192 http://dx.doi.org/10.1038/srep19327 Text en Copyright © 2016, Macmillan Publishers Limited http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
spellingShingle Article
Wang, Guocheng
Luo, Zhongkui
Han, Pengfei
Chen, Huansheng
Xu, Jingjing
Critical carbon input to maintain current soil organic carbon stocks in global wheat systems
title Critical carbon input to maintain current soil organic carbon stocks in global wheat systems
title_full Critical carbon input to maintain current soil organic carbon stocks in global wheat systems
title_fullStr Critical carbon input to maintain current soil organic carbon stocks in global wheat systems
title_full_unstemmed Critical carbon input to maintain current soil organic carbon stocks in global wheat systems
title_short Critical carbon input to maintain current soil organic carbon stocks in global wheat systems
title_sort critical carbon input to maintain current soil organic carbon stocks in global wheat systems
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4725856/
https://www.ncbi.nlm.nih.gov/pubmed/26759192
http://dx.doi.org/10.1038/srep19327
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