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Modeling Soil Organic Carbon Change across Australian Wheat Growing Areas, 1960–2010

Soil organic carbon (SOC) dynamics in Australian wheat-growing areas were simulated from 1960 to 2010 using Agro-C, a calibrated and validated biogeophysical model. Previously published data from field measurements were used to parameterize the Agro-C model. Model simulations show a decreasing trend...

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Detalles Bibliográficos
Autores principales: Wang, Guocheng, Huang, Yao, Wang, Enli, Yu, Yongqiang, Zhang, Wen
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Public Library of Science 2013
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3656038/
https://www.ncbi.nlm.nih.gov/pubmed/23696813
http://dx.doi.org/10.1371/journal.pone.0063324
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author Wang, Guocheng
Huang, Yao
Wang, Enli
Yu, Yongqiang
Zhang, Wen
author_facet Wang, Guocheng
Huang, Yao
Wang, Enli
Yu, Yongqiang
Zhang, Wen
author_sort Wang, Guocheng
collection PubMed
description Soil organic carbon (SOC) dynamics in Australian wheat-growing areas were simulated from 1960 to 2010 using Agro-C, a calibrated and validated biogeophysical model. Previously published data from field measurements were used to parameterize the Agro-C model. Model simulations show a decreasing trend in SOC over the last 50 years, mainly attributable to relatively low organic carbon (C) inputs. The rate of decrease in SOC tended to slow in the last two decades due primarily to an increase in wheat yields, which resulted in an increase in C input. Overall, we estimate that Australian wheat-growing areas, covering an area of 15.09 million hectares (Mha), lost 156 (86–222, 95% confidence interval) Tg C in the topsoil (to 30 cm depth) from 1960 to 2010. Approximately 80% of the SOC loss occurred in the period between the 1960s and the 1980s. Spatially, the SOC loss in areas with relatively high temperature and low precipitation, such as Queensland, the northern part of New South Wales and Western Australia, was more significant than that in other areas. We suggest that the loss of SOC could be halted, or even reversed, with an additional input of organic C into the soil at a minimum rate of 0.4 Mg ha(–1) yr(–1).
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spelling pubmed-36560382013-05-21 Modeling Soil Organic Carbon Change across Australian Wheat Growing Areas, 1960–2010 Wang, Guocheng Huang, Yao Wang, Enli Yu, Yongqiang Zhang, Wen PLoS One Research Article Soil organic carbon (SOC) dynamics in Australian wheat-growing areas were simulated from 1960 to 2010 using Agro-C, a calibrated and validated biogeophysical model. Previously published data from field measurements were used to parameterize the Agro-C model. Model simulations show a decreasing trend in SOC over the last 50 years, mainly attributable to relatively low organic carbon (C) inputs. The rate of decrease in SOC tended to slow in the last two decades due primarily to an increase in wheat yields, which resulted in an increase in C input. Overall, we estimate that Australian wheat-growing areas, covering an area of 15.09 million hectares (Mha), lost 156 (86–222, 95% confidence interval) Tg C in the topsoil (to 30 cm depth) from 1960 to 2010. Approximately 80% of the SOC loss occurred in the period between the 1960s and the 1980s. Spatially, the SOC loss in areas with relatively high temperature and low precipitation, such as Queensland, the northern part of New South Wales and Western Australia, was more significant than that in other areas. We suggest that the loss of SOC could be halted, or even reversed, with an additional input of organic C into the soil at a minimum rate of 0.4 Mg ha(–1) yr(–1). Public Library of Science 2013-05-16 /pmc/articles/PMC3656038/ /pubmed/23696813 http://dx.doi.org/10.1371/journal.pone.0063324 Text en © 2013 Wang 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, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.
spellingShingle Research Article
Wang, Guocheng
Huang, Yao
Wang, Enli
Yu, Yongqiang
Zhang, Wen
Modeling Soil Organic Carbon Change across Australian Wheat Growing Areas, 1960–2010
title Modeling Soil Organic Carbon Change across Australian Wheat Growing Areas, 1960–2010
title_full Modeling Soil Organic Carbon Change across Australian Wheat Growing Areas, 1960–2010
title_fullStr Modeling Soil Organic Carbon Change across Australian Wheat Growing Areas, 1960–2010
title_full_unstemmed Modeling Soil Organic Carbon Change across Australian Wheat Growing Areas, 1960–2010
title_short Modeling Soil Organic Carbon Change across Australian Wheat Growing Areas, 1960–2010
title_sort modeling soil organic carbon change across australian wheat growing areas, 1960–2010
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3656038/
https://www.ncbi.nlm.nih.gov/pubmed/23696813
http://dx.doi.org/10.1371/journal.pone.0063324
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