A review on the possible factors influencing soil inorganic carbon under elevated CO2

Ferdush, Jannatul; Paul, Varun

doi:10.1016/j.catena.2021.105434

Cited by 58 publications

(43 citation statements)

References 221 publications

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“…Our study revealed that intensive cropping without fertilizer input (the CK) significantly increased SIC accumulation by 13.78% compared with the fallow. This mainly due to more CO 2 was trapped into soil solution in the CK, which may promote SIC re‐precipitation as soil pH increased from 8.1 to 8.7 (Ferdush & Paul, 2021; Raza et al, 2021). It is showed that soil buffering system is dominant by

{HCO}_{3}^{-}

when pH is over 8.3 (Raza et al, 2021), which contributes to SIC formation and accumulation.…”

Section: Discussionmentioning

confidence: 99%

“…The content of Ca 2+ cation in our study under mineral nitrogen fertilizer application showed an increase compared with the CK, while it was equal to that of other treatments. Firstly, soil Ca 2+ /Mg 2+ cations get redistributed according to the distribution of plant roots promoted by fertilization (Ferdush & Paul, 2021; Mi et al, 2008). In addition, enhanced evaporation resulted from relative higher yield under mineral fertilization also can cause the upward movement of Ca 2+ /Mg 2+ in soil (Ferdush & Paul, 2021).…”

Section: Discussionmentioning

confidence: 99%

“…The stock of SIC in cropland is largely influenced by land management practices, such as irrigation and fertilization (Ferdush & Paul, 2021; Kim et al, 2020; Zamanian et al, 2016). Studies from long‐term fertilization fields demonstrate that applications of organic and mineral fertilizers can increase the SIC stock in North China (Bughio et al, 2016; Wang et al, 2015b; Wang et al, 2014), which may be a result of extra available Ca 2+ and Mg 2+ supplied by fertilizers.…”

Section: Introductionmentioning

confidence: 99%

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Organic amendments facilitate soil carbon sequestration via organic carbon accumulation and mitigation of inorganic carbon loss

et al. 2022

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Both soil organic carbon (SOC) and soil inorganic carbon (SIC) are important carbon reservoirs involved in the global carbon cycle. Fertilization especially organic amendments can increase SOC sequestration, while nitrogen fertilization-induced soil acidification leads to significant SIC loss in alkline soil. How fertilization changes SIC and SOC via altering abiotic and biotic properties remains unclear. Here, we investigated the effects of mineral fertilizer with/without organic amendments (manure, straw, green manure) on SIC and SOC in bulk soil and particle-size fractions, as well as their interrelationship based on a 38-year field trial. Results showed that compared to the unfertilized soil, mineral fertilization significantly decreased SIC by 13.38%-15.69%, primarily due to decreased soil pH. However, mineral nitrogen plus manure (NM) largely increased SIC by 26.55%, likely resulting from the CO 2À 3 reprecipitated by Ca 2+ and/or Mg 2+ compensation. Mineral nitrogen plus manure and straw (NM, NS) increased SOC by 11.12%-100.35%. For bulk soil and particle-size fractions >0.25 mm, SIC content was positively correlated with SOC. Random forest model revealed that SOC was regulated by soil nutrients (total nitrogen [TN], Olsen-P), microbial biomass and β-1,4-N-acetyl-glucosaminidase. The change in SIC was directly regulated by soil Mg 2+ , and indirectly by soil nutrients (e.g., TN, Olsen-P) which affected crop-derived C input. Our findings suggested that organic manure amendments can facilitate SOC accumulation and mitigate SIC loss by occluded more SIC in large soil particles. The results are of fundamental significance for understanding the role of optimal manure application played in SOC sequestration and SIC accumulation.

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{HCO}_{3}^{-}

when pH is over 8.3 (Raza et al, 2021), which contributes to SIC formation and accumulation.…”

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Organic amendments facilitate soil carbon sequestration via organic carbon accumulation and mitigation of inorganic carbon loss

et al. 2022

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“…In calcareous soils of the Comarca Lagunera, average CO 2 emissions were 10.70 μmol m -2 s -1 , contrasting with studies reported for the Chihuahuan desert in the Big Bend National Park, where a CO 2 emission of 1.46 μmol m -2 s -1 was reported, despite soil contains 3.7 % (37 mg g -1 of C) of SOC (Cable et al, 2011). Quantification of CO 2 emissions from soils considers primarily the degradation of SOC reserves (Kuzyakov, 2006), which integrates organic residues and soil microorganisms, as they are related to anthropogenic activities, but for arid zones, it must add the contribution of the SIC to CO 2 emissions (Zamanian et al, 2021), because the amounts of stored SIC exceed those of SOC by several times (Ferdush and Paul, 2021).…”

Section: Emissions Of Co 2 Of Calcareous Soils From the Comarca Laguneramentioning

confidence: 99%

CO2 emission affected by moisture content and aggregate sizes in a calcareous soil of Comarca Lagunera, Mexico

Martínez-Santiago¹,

Benedicto-Valdés²,

López-Santos³

et al. 2022

Revista Brasileira De Ciência Do Solo

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Soil CO 2 emissions are formed from biotic and abiotic processes related to organic carbon (SOC) and inorganic carbon (SIC), respectively. Calcareous soil has a high amount of SIC and occurs mainly in arid areas, and little is known about CO 2 emissions from aggregates of this soil. This study aims to evaluate the emission of CO 2 of aggregates from calcareous soil in the Comarca Lagunera, Mexico. Soil samples were taken from the layers of 0.00-0.15 and 0.15-0.30 m, and soil physical and chemical properties were determined. Aggregates distribution was obtained using the dry-sieving method. Macro (0.25-0.149 mm), meso (0.149-0.074 mm) and microaggregates (<0.074 mm) were selected for incubation in a dynamic closed system for 30 days under two moisture contents (15 and 30 %, dry weight basis). The CO 2 emissions were quantified using a non-dispersive infrared gas analyzer (IRGA). From total carbon measured, 97 % were found to be SIC. Soil texture is a sandy clay loam with a field capacity and a permanent wilting point of 27 and 17 %, respectively. From whole soil aggregates, 60 % were distributed in fractions lower than 0.25 mm diameter, which are highly erodible by the wind. Soil moisture content had a significant effect on the emission of CO 2 . The highest accumulated CO 2 emission was registered in the superficial layer (0.00-0.15 m) within 0.25 mm aggregates (29.4 g m -2 h -1 ), which turned out higher than reported for similar areas. The CO 2 emissions were attributed to the dissolution -reprecipitation process of high concentrations of SIC present in soil, involving a considerable contribution of CO 2 to the atmosphere.

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“…However, due to the shielding effect of the soil layer, the chemical weathering flux budget of the underlying bedrocks often loses more than 40% under natural conditions (Hartmann et al, 2014), and the main reason is the incomplete weathering of rocks, resulting in the formation of smaller primary and secondary minerals distributed in the soil, such as feldspar, pyroxene, chlorite, smectite and mica, etc (Zolkos et al, 2018). These minerals can not only store about 600Pg of organic carbon per year (Ferdush and Paul, 2021), but also absorbing a certain scale of inorganic carbon through chemical reaction with CO2 in the atmosphere/soil (Doetterl et al, 2018), especially for most clay minerals with silicate as the main component, they are not only widely distributed, but also having a large specific surface area for reaction, resulting in a high degree of stability of the carbon sink effect on the geological time scale (Bibi et al, 2016;Whitfield et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Large invisible carbon sink potential of global clay minerals to mitigate climate change

Bai

et al. 2021

Preprint

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The chemical weathering of clay minerals widely distributed in the soil have great potential of carbon sink (CS), but the magnitude and influence mechanisms of this CS are unclear. Here we analyse recent changes in five major clay minerals (chlorite, smectite, mica, illite, and vermiculite) carbon sink and its driving factors, using a process-based model (PROFILE) and satellite data assimilation. We show that magnitude of CS in five major clay minerals is about 0.11 Pg C yr-1 from 0 to 2m depth of soil, which is one third of CS in rocks and also may be mainly responsible for the world's missing carbon sink. According to our simulations, the linear trend of CS during 1970-2018 showing that CS in 56% of the world increasing significantly, although the intensification of CS cannot be explained by soil moisture (SM) or soil temperature (STMP) alone, they are the dominant cause of the intensification of CS in the high latitude area and the decrease of CS in parts of the tropics, while in areas where SM is drier, STMP may weaken the former’s negative effect on CS. Besides, simulation results based on medium emission scenarios indicating that CS may increase by about 36% by the end of this century. These results highlight that a more comprehensive understanding of the magnitude and driving mechanism of the soil minerals’ CS is the key to realizing their potential as a nature-based climate solution.

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A review on the possible factors influencing soil inorganic carbon under elevated CO2

Cited by 58 publications

References 221 publications

Organic amendments facilitate soil carbon sequestration via organic carbon accumulation and mitigation of inorganic carbon loss

Organic amendments facilitate soil carbon sequestration via organic carbon accumulation and mitigation of inorganic carbon loss

CO2 emission affected by moisture content and aggregate sizes in a calcareous soil of Comarca Lagunera, Mexico

Large invisible carbon sink potential of global clay minerals to mitigate climate change

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