Details
| Original language | English |
|---|---|
| Article number | 128036 |
| Journal | Journal of cleaner production |
| Volume | 315 |
| Publication status | Published - 15 Sept 2021 |
| Externally published | Yes |
Abstract
Soil plays a significant role in controlling the global carbon (C) cycle. Studies on climate change mitigation have focused entirely on soil organic carbon (SOC) to increase C sequestration and decrease carbon dioxide (CO2) emissions. In contrast, the contribution of soil inorganic carbon (SIC) to CO2 emissions is usually neglected because SIC is generally considered to be very stable. However, the significant worldwide increase in soil acidification, mainly because of intensive N fertilization and high atmospheric deposition, causes a considerable decrease in SIC stocks, leading to very high unaccounted CO2 efflux. Additionally, large areas of acidic soils worldwide are regularly subjected to high SIC applications in the form of lime to remediate acidity, which is another direct source of CO2 emission. Consequently, global efforts to mitigate climate change through SOC sequestration need a revisit as SIC-borne C losses are significant both in terms of C stocks and soil fertility loss, upon which future SOC sequestration will be reduced. Compared to SOC, wherein C stocks can be increased through management, SIC losses are irreversible and cause significant decline in soil health, ecosystem services, and functions. The present review is the first to summarize the current information about acidification-induced intensified SIC losses and their mechanisms. It included: (i) natural and anthropogenic sources and causes of soil acidification, (ii) losses of SIC as HCO3− leaching and CO2 efflux from calcareous soils (7.5 Tg C yr−1) and liming (273 Tg C yr−1) during acidity neutralization, (iii) the relationship between climate change and SIC stocks, (iv) consequences of SIC depletion in soil-plant-water systems, and (v) strategies to remediate and control soil acidification. We concluded that acidification-induced SIC-borne CO2 losses are a major C loss pathway and could jeopardize global efforts to mitigate climate change through SOC sequestration.
Keywords
- Carbon dioxide efflux, Carbon sequestration, Carbonate dissolution, Reactive nitrogen, Soil acidification, Soil inorganic carbon
ASJC Scopus subject areas
- Energy(all)
- Renewable Energy, Sustainability and the Environment
- Engineering(all)
- Building and Construction
- Environmental Science(all)
- Business, Management and Accounting(all)
- Strategy and Management
- Engineering(all)
- Industrial and Manufacturing Engineering
Sustainable Development Goals
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In: Journal of cleaner production, Vol. 315, 128036, 15.09.2021.
Research output: Contribution to journal › Article › Research
}
TY - JOUR
T1 - Inorganic carbon losses by soil acidification jeopardize global efforts on carbon sequestration and climate change mitigation
AU - Raza, Sajjad
AU - Zamanian, Kazem
AU - Ullah, Sami
AU - Kuzyakov, Yakov
AU - Virto, Iñigo
AU - Zhou, Jianbin
N1 - Publisher Copyright: © 2021 Elsevier Ltd
PY - 2021/9/15
Y1 - 2021/9/15
N2 - Soil plays a significant role in controlling the global carbon (C) cycle. Studies on climate change mitigation have focused entirely on soil organic carbon (SOC) to increase C sequestration and decrease carbon dioxide (CO2) emissions. In contrast, the contribution of soil inorganic carbon (SIC) to CO2 emissions is usually neglected because SIC is generally considered to be very stable. However, the significant worldwide increase in soil acidification, mainly because of intensive N fertilization and high atmospheric deposition, causes a considerable decrease in SIC stocks, leading to very high unaccounted CO2 efflux. Additionally, large areas of acidic soils worldwide are regularly subjected to high SIC applications in the form of lime to remediate acidity, which is another direct source of CO2 emission. Consequently, global efforts to mitigate climate change through SOC sequestration need a revisit as SIC-borne C losses are significant both in terms of C stocks and soil fertility loss, upon which future SOC sequestration will be reduced. Compared to SOC, wherein C stocks can be increased through management, SIC losses are irreversible and cause significant decline in soil health, ecosystem services, and functions. The present review is the first to summarize the current information about acidification-induced intensified SIC losses and their mechanisms. It included: (i) natural and anthropogenic sources and causes of soil acidification, (ii) losses of SIC as HCO3− leaching and CO2 efflux from calcareous soils (7.5 Tg C yr−1) and liming (273 Tg C yr−1) during acidity neutralization, (iii) the relationship between climate change and SIC stocks, (iv) consequences of SIC depletion in soil-plant-water systems, and (v) strategies to remediate and control soil acidification. We concluded that acidification-induced SIC-borne CO2 losses are a major C loss pathway and could jeopardize global efforts to mitigate climate change through SOC sequestration.
AB - Soil plays a significant role in controlling the global carbon (C) cycle. Studies on climate change mitigation have focused entirely on soil organic carbon (SOC) to increase C sequestration and decrease carbon dioxide (CO2) emissions. In contrast, the contribution of soil inorganic carbon (SIC) to CO2 emissions is usually neglected because SIC is generally considered to be very stable. However, the significant worldwide increase in soil acidification, mainly because of intensive N fertilization and high atmospheric deposition, causes a considerable decrease in SIC stocks, leading to very high unaccounted CO2 efflux. Additionally, large areas of acidic soils worldwide are regularly subjected to high SIC applications in the form of lime to remediate acidity, which is another direct source of CO2 emission. Consequently, global efforts to mitigate climate change through SOC sequestration need a revisit as SIC-borne C losses are significant both in terms of C stocks and soil fertility loss, upon which future SOC sequestration will be reduced. Compared to SOC, wherein C stocks can be increased through management, SIC losses are irreversible and cause significant decline in soil health, ecosystem services, and functions. The present review is the first to summarize the current information about acidification-induced intensified SIC losses and their mechanisms. It included: (i) natural and anthropogenic sources and causes of soil acidification, (ii) losses of SIC as HCO3− leaching and CO2 efflux from calcareous soils (7.5 Tg C yr−1) and liming (273 Tg C yr−1) during acidity neutralization, (iii) the relationship between climate change and SIC stocks, (iv) consequences of SIC depletion in soil-plant-water systems, and (v) strategies to remediate and control soil acidification. We concluded that acidification-induced SIC-borne CO2 losses are a major C loss pathway and could jeopardize global efforts to mitigate climate change through SOC sequestration.
KW - Carbon dioxide efflux
KW - Carbon sequestration
KW - Carbonate dissolution
KW - Reactive nitrogen
KW - Soil acidification
KW - Soil inorganic carbon
UR - http://www.scopus.com/inward/record.url?scp=85109078466&partnerID=8YFLogxK
U2 - 10.1016/j.jclepro.2021.128036
DO - 10.1016/j.jclepro.2021.128036
M3 - Article
AN - SCOPUS:85109078466
VL - 315
JO - Journal of cleaner production
JF - Journal of cleaner production
SN - 0959-6526
M1 - 128036
ER -