Cargando…
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...
Autores principales: | , , , , |
---|---|
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 |
_version_ | 1782269975462936576 |
---|---|
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). |
format | Online Article Text |
id | pubmed-3656038 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2013 |
publisher | Public Library of Science |
record_format | MEDLINE/PubMed |
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 |
work_keys_str_mv | AT wangguocheng modelingsoilorganiccarbonchangeacrossaustralianwheatgrowingareas19602010 AT huangyao modelingsoilorganiccarbonchangeacrossaustralianwheatgrowingareas19602010 AT wangenli modelingsoilorganiccarbonchangeacrossaustralianwheatgrowingareas19602010 AT yuyongqiang modelingsoilorganiccarbonchangeacrossaustralianwheatgrowingareas19602010 AT zhangwen modelingsoilorganiccarbonchangeacrossaustralianwheatgrowingareas19602010 |