Organic Amendments Alter Long-Term Turnover and Stability of Soil Carbon: Perspectives from a Data-Model Integration

Organic amendment (OA) additions may profoundly regulate the turnover behaviours of soil organic carbon (SOC). Explicit understanding of such role of OA is crucial for accurately assessing the potential of carbon sequestration in agricultural soils. To explore the effects of OA additions on the deta...

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Autores principales:	Guocheng Wang, Zhongkui Luo
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	soil organic carbon residue management manure soil carbon model microbial carbon use efficiency carbon sequestration Agriculture S
Acceso en línea:	https://doaj.org/article/69e49daa7d614fa48de9b7f15f56c10c
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spelling	oai:doaj.org-article:69e49daa7d614fa48de9b7f15f56c10c2021-11-25T16:03:47ZOrganic Amendments Alter Long-Term Turnover and Stability of Soil Carbon: Perspectives from a Data-Model Integration10.3390/agronomy111121342073-4395https://doaj.org/article/69e49daa7d614fa48de9b7f15f56c10c2021-10-01T00:00:00Zhttps://www.mdpi.com/2073-4395/11/11/2134https://doaj.org/toc/2073-4395Organic amendment (OA) additions may profoundly regulate the turnover behaviours of soil organic carbon (SOC). Explicit understanding of such role of OA is crucial for accurately assessing the potential of carbon sequestration in agricultural soils. To explore the effects of OA additions on the detailed SOC stabilization and destabilization processes, we collected SOC measurements from 29 trials with experimental duration ranging from 14 to 85 years across the globe. Using these datasets, we constrained a soil carbon model to analyse SOC turnover and built-up processes as impacted by OA additions. We found that OA generally decreases microbial carbon use efficiency (CUE) and the fraction of inert SOC that is resistant to decomposition (f<sub>inert</sub>), but has divergent effects on the decay rate of humic SOC (k<sub>hum</sub>). Across the sites, there was great variability in the effects of OA on CUE, k<sub>hum</sub>, and f<sub>inert</sub>, which can be largely explained by local soil and climate conditions and the quantity and quality of OA. Long-term simulations suggested that, without considering the effects of OA on CUE, k<sub>hum</sub>, and f<sub>inert</sub>, the effectiveness of OA additions for carbon sequestration could be largely overestimated. Our results suggest that the strong site-specific regulations of OA on SOC dynamics as demonstrated in this study must be properly considered and better constrained by observational data when assessing SOC sequestration in agricultural soils under the management of OA additions.Guocheng WangZhongkui LuoMDPI AGarticlesoil organic carbonresidue managementmanuresoil carbon modelmicrobial carbon use efficiencycarbon sequestrationAgricultureSENAgronomy, Vol 11, Iss 2134, p 2134 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	soil organic carbon residue management manure soil carbon model microbial carbon use efficiency carbon sequestration Agriculture S
spellingShingle	soil organic carbon residue management manure soil carbon model microbial carbon use efficiency carbon sequestration Agriculture S Guocheng Wang Zhongkui Luo Organic Amendments Alter Long-Term Turnover and Stability of Soil Carbon: Perspectives from a Data-Model Integration
description	Organic amendment (OA) additions may profoundly regulate the turnover behaviours of soil organic carbon (SOC). Explicit understanding of such role of OA is crucial for accurately assessing the potential of carbon sequestration in agricultural soils. To explore the effects of OA additions on the detailed SOC stabilization and destabilization processes, we collected SOC measurements from 29 trials with experimental duration ranging from 14 to 85 years across the globe. Using these datasets, we constrained a soil carbon model to analyse SOC turnover and built-up processes as impacted by OA additions. We found that OA generally decreases microbial carbon use efficiency (CUE) and the fraction of inert SOC that is resistant to decomposition (f<sub>inert</sub>), but has divergent effects on the decay rate of humic SOC (k<sub>hum</sub>). Across the sites, there was great variability in the effects of OA on CUE, k<sub>hum</sub>, and f<sub>inert</sub>, which can be largely explained by local soil and climate conditions and the quantity and quality of OA. Long-term simulations suggested that, without considering the effects of OA on CUE, k<sub>hum</sub>, and f<sub>inert</sub>, the effectiveness of OA additions for carbon sequestration could be largely overestimated. Our results suggest that the strong site-specific regulations of OA on SOC dynamics as demonstrated in this study must be properly considered and better constrained by observational data when assessing SOC sequestration in agricultural soils under the management of OA additions.
format	article
author	Guocheng Wang Zhongkui Luo
author_facet	Guocheng Wang Zhongkui Luo
author_sort	Guocheng Wang
title	Organic Amendments Alter Long-Term Turnover and Stability of Soil Carbon: Perspectives from a Data-Model Integration
title_short	Organic Amendments Alter Long-Term Turnover and Stability of Soil Carbon: Perspectives from a Data-Model Integration
title_full	Organic Amendments Alter Long-Term Turnover and Stability of Soil Carbon: Perspectives from a Data-Model Integration
title_fullStr	Organic Amendments Alter Long-Term Turnover and Stability of Soil Carbon: Perspectives from a Data-Model Integration
title_full_unstemmed	Organic Amendments Alter Long-Term Turnover and Stability of Soil Carbon: Perspectives from a Data-Model Integration
title_sort	organic amendments alter long-term turnover and stability of soil carbon: perspectives from a data-model integration
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/69e49daa7d614fa48de9b7f15f56c10c
work_keys_str_mv	AT guochengwang organicamendmentsalterlongtermturnoverandstabilityofsoilcarbonperspectivesfromadatamodelintegration AT zhongkuiluo organicamendmentsalterlongtermturnoverandstabilityofsoilcarbonperspectivesfromadatamodelintegration
_version_	1718413320255438848

Organic Amendments Alter Long-Term Turnover and Stability of Soil Carbon: Perspectives from a Data-Model Integration

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