Inorganic carbon losses by soil acidification jeopardize global efforts on carbon sequestration and climate change mitigation

Raza, Sajjad; Zamanian, Kazem; Ullah, Sami; Kuzyakov, Yakov; Virto, Iñigo; Zhou, Jianbin

doi:10.1016/j.jclepro.2021.128036

Cited by 83 publications

(44 citation statements)

References 136 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%

“…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. In addition, compared with the CK, various vegetations in fallow can release more organic acids into soil and decrease soil pH, leading to dissolution of SIC in fallow (Liu et al, 2016).…”

Section: Discussionmentioning

confidence: 99%

“…Our findings indicated that SIC was significantly correlated with soil Olsen‐P, TN, SOC and Mg 2+ (Figure 5b). In fact, soil Ca 2+ /Mg 2+ ,

{CO}_{3}^{2 -} / {HCO}_{3}^{-},

and pH are direct factors affecting the formation and dissolution of carbonate (Raza et al, 2021; Wang et al, 2015b). Soil nutrients availability (e.g., Olsen‐P and TN) is closely related to microbial biomass and SOC mineralization, thus indirectly influence SIC accumulation via CO 2 dissolution from soil microbial respiration.…”

Section: Discussionmentioning

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%

{HCO}_{3}^{-}

Section: Discussionmentioning

confidence: 99%

“…Our findings indicated that SIC was significantly correlated with soil Olsen‐P, TN, SOC and Mg 2+ (Figure 5b). In fact, soil Ca 2+ /Mg 2+ ,

{CO}_{3}^{2 -} / {HCO}_{3}^{-},

Section: Discussionmentioning

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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“…Actions to mitigate the increase in atmospheric CO 2 concentration related to carbon capture through SOC should be reviewed (Raza et al, 2021), mainly in calcareous soils, since the emission of CO 2 generated because of dissolution of the SIC reserve are considerable and influences the carbon cycle and global warming (Zamanian et al, 2018). To increase knowledge on calcareous soils in Mexico is needed, including additional studies about structural characteristics and chemical composition, with particular emphasis on SOC and SIC relationship.…”

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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“…During the past fifty years, the grain yield per unit area in the world has increased by 130.34%, which the wide application of synthetic N fertilizer around the world has significantly contributed to [1]. At the same time, the excessive application of synthetic N fertilizer in agricultural production has caused to serious environmental issues, including soil acidification [2], N 2 O emissions [3], water eutrophication [4], acid rain [5], etc. The environmental impacts are damaging the sustainability of crop farming systems and causing the possibility of declining crop yields [6].…”

Section: Introductionmentioning

confidence: 99%

Replacing Synthetic Nitrogen Fertilizer with Different Types of Organic Materials Improves Grain Yield in China: A Meta-Analysis

et al. 2021

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Synthetic nitrogen fertilizer substitution (NSS) with different types of organic material is a cleaner agricultural practice for reducing the application of synthetic N input in farmlands while also relieving the environmental issues caused by the discharge of organic wastes. However, the effects of the NSS practice on crop yields, being the primary objective of agricultural activity, is still uncertain in China. This study conducted a meta-analysis to assess the impacts of the NSS practices with different types of organic materials on crop yields. Results showed that the average crop yield was increased by 3.4%, with significant differences under NSS, thereby demonstrating that this practice contributed to improving crop yields, especially of rice and maize. According to published reports, the NSS practices involving chicken manure, pig manure, and crop straw increased crop yields by 4.79, 7.68, and 3.28%, respectively, with significant differences, thus demonstrating the superior effects needed for replacing synthetic N fertilizer. Moreover, substitution ratios (SR) between 0% and 60% could be suggested when using the NSS practice, with the high SR recommended when the original soil fertility was adequate for crops. Considering the long-term effects of applied organic materials, improving the grain yield with the NSS practice should be expected in the long-term. By effectively applying the NSS, this study attempted to scientifically decide on the type of organic materials and the appropriate SR based on the conditions of the soil and the crop. The results provide research information for the development of clean agricultural production and food security in China.

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Inorganic carbon losses by soil acidification jeopardize global efforts on carbon sequestration and climate change mitigation

Cited by 83 publications

References 136 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

Replacing Synthetic Nitrogen Fertilizer with Different Types of Organic Materials Improves Grain Yield in China: A Meta-Analysis

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