Influencing factors and partitioning methods of carbonate contribution to CO2 emissions from calcareous soils

Sun, Zhaoan; Meng, Fanqiao; Zhu, Biao

doi:10.1007/s42832-022-0139-1

Cited by 16 publications

(10 citation statements)

References 106 publications

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“…Several recent reviews ( 17 , 27 , 41 , 46 ) have synthesized the sources and drivers of soil acidification, the mechanisms of pedogenic carbonate formation, and the multiple factors and pathways that regulate SIC dynamics across a wide range of conditions. Results in this study provide knowledge and quantitative insights into inorganic carbon dynamics.…”

Section: Discussionmentioning

confidence: 99%

Size, distribution, and vulnerability of the global soil inorganic carbon

Huang,

Song,

Wang

et al. 2024

Science

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Global estimates of the size, distribution, and vulnerability of soil inorganic carbon (SIC) remain largely unquantified. By compiling 223,593 field-based measurements and developing machine-learning models, we report that global soils store 2305 ± 636 (±1 SD) billion tonnes of carbon as SIC over the top 2-meter depth. Under future scenarios, soil acidification associated with nitrogen additions to terrestrial ecosystems will reduce global SIC (0.3 meters) up to 23 billion tonnes of carbon over the next 30 years, with India and China being the most affected. Our synthesis of present-day land-water carbon inventories and inland-water carbonate chemistry reveals that at least 1.13 ± 0.33 billion tonnes of inorganic carbon is lost to inland-waters through soils annually, resulting in large but overlooked impacts on atmospheric and hydrospheric carbon dynamics.

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Section: Discussionmentioning

confidence: 99%

Size, distribution, and vulnerability of the global soil inorganic carbon

Huang,

Song,

Wang

et al. 2024

Science

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“…The reversible reaction CaCO increase favors CaCO 3 recrystallization [74]. On the contrary, other studies in laboratory and field were in line with CaCO 3 dissolution, as attested by CO 2 emissions derived from soil inorganic carbon [6]. Calcareous soil temperature increase stimulated both root and shoot vegetative biomass production but also chlorosis in sorghum leaves [75].…”

Section: Calcareous Soil Tolerance In the Context Of Climate Changementioning

confidence: 84%

“…CaCO 3 is subject to fast dissolution-precipitation reactions and thereby actively participates in the carbon (C) biogeochemical cycle at the human scale [1]. CaCO 3 dissolution-precipitation depends on a range of biotic (e.g., microbiota respiration) and abiotic (e.g., soil composition and moisture) factors [6]. Calcareous soil pH is mainly buffered by reactions with CaCO 3 and air CO 2 and is close to 8 [7].…”

mentioning

confidence: 99%

Growing on calcareous soils and facing climate change

Bontpart,

Weiss,

Vile

et al. 2024

Trends in Plant Science

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“…. Calcium carbonate (CaCO 3 ) is the main existing form of SIC, hence the calcium source plays an important role and determines whether carbonate can be formed (Sun et al, 2022;Wang et al, 2014). SIC in the surface soil layer may be susceptible to leaching and precipitation into deeper soil layers under high soil water fluxes, CO 2 degassing, and acidic conditions (Zhao X. et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Profile soil organic and inorganic carbon sequestration in maize cropland after long-term straw return

Xie

Zhang

et al. 2023

Front. Environ. Sci.

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Promoting cropland carbon (C) sequestration through straw return has always been the focus of numerous studies. However, there is still a lack of comprehensive understanding of the straw return effects on soil organic carbon (SOC) and soil inorganic carbon (SIC) sequestration. Therefore, the present study aims to investigate the effects of long-term straw return on SOC and SIC sequestration across the 0–100 cm soil profile in the maize planting cropland in Northeastern China. The results showed an increasing trend in SOC contents in the 0–100 cm soil profile following long-term straw return, while significant decreases in SIC contents were observed in the surface (0–20 cm) and subsoil (20–60 cm) layers, respectively. In addition, the SOC stock increased significantly in the subsoil layer following long-term straw return, by an average value of 44%, which is higher than those observed in other soil layers. On the other hand, the SIC stock in the subsoil layer increased by an average value of 24% and decreased in the surface and under-subsoil layers by average values of 53% and 33%, respectively. Moreover, the exchangeable calcium contents were positively correlated with SOC and SIC stock, demonstrating the soil calcium contributes to SOC and SIC sequestration. The present study highlighted the importance of the subsoil layer for effective straw return strategies in cropland to promote SOC and SIC sequestration in croplands.

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Influencing factors and partitioning methods of carbonate contribution to CO2 emissions from calcareous soils

Cited by 16 publications

References 106 publications

Size, distribution, and vulnerability of the global soil inorganic carbon

Size, distribution, and vulnerability of the global soil inorganic carbon

Growing on calcareous soils and facing climate change

Profile soil organic and inorganic carbon sequestration in maize cropland after long-term straw return

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