Millennium timescale carbon stability in an Andisol: How persistent are organo-metal complexes?

Shimada, Hiroaki; Wagai, Rota; Inoue, Yukihiko; Tamura, Kenji; Asano, Masaharu

doi:10.1016/j.geoderma.2022.115820

Cited by 5 publications

(3 citation statements)

References 61 publications

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“…Such soils have considerable amounts of HIV clay minerals with moderate to high clay CEC > 30 but -1 <65 cmol (+) kg (Caner et al 2000). These authors explained the OC enrichment even in presence of HIV, which is basically due to metal-humus complexes because in acidic soil conditions, Fe and Aloxides serve as a good source of positively charged metal cations for metal-humus complexation (Oades 1989;Chatterjee et al 2014;Kleber et al 2015;Shimada et al 2022). SOC sequestration in some of the Indian non-acidic smectitic Vertisols and Inceptisols with predominance of mica has also been linked to amorphous Al and Fe oxides (Chatterjee et al 2013) and poorly crystalline layer silicate minerals (Datta et al 2015) like in Andisols.…”

Section: Soc Enrichment In Ultisolsmentioning

confidence: 99%

Ultisols with Unique Soil Properties and their Implications in Carbon Enhancement Strategies for Indian Tropical Soils

Pal,

Chandran,

Paul

et al. 2023

agroped

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Million years old Ultisols, developed as an end stage of advance soil weathering on base-poor rock systems under forest and plantation crops of the Indian sub-continent, are enriched with organic carbon (OC). Despite their remarkable acid chemical reaction, they show an upward increase in extractable bases (EB) and base saturation (BS) in the pedon, and on some occasion BS > 35% in surface horizons. Recent research suggests that the litter falls from forest species provide bases on soil surface, which causes similar depth distribution of EB and BS in Andisols of Nilgiri Hills of humid tropical southern India, developed on pre-weathered lateritic materials consisting primarily of Fe and Al oxides/ hydroxides. Under similar humid tropical (HT) climate in protected rain forest, million years old OC rich soils of Andaman and Nicobar Islands, developed on base-poor rock systems, have similar chemical and clay mineralogical properties of Ultisols except however their EB and BS, which are more than 10% and much above 50%, respectively and therefore, they are acidic Alfisols. Formation of Alfisols on the Island is a unique example on the formidable role of vegetation in soil formation, suggesting that if inland Ultisols are kept under natural protected forest ecosystem, they may phase towards Alfisols thereby facilitating OC sequestration and perform other ecosystem functions. The preservation of natural or semi-natural ecosystems is thus essential to raise the OC stocks of soils, which would help to gain various ecological benefits.

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Section: Soc Enrichment In Ultisolsmentioning

confidence: 99%

Ultisols with Unique Soil Properties and their Implications in Carbon Enhancement Strategies for Indian Tropical Soils

Pal,

Chandran,

Paul

et al. 2023

agroped

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“…Most of the soil samples in the studied area correspond to the Andisol and Histosol order; according to the U.S. Soil Taxonomy System, Andisols soils derived from volcanic ejecta, especially volcanic ash, are characterized by high concentrations of OM [45].…”

Section: Sampling Site Descriptionmentioning

confidence: 99%

Assessing and Understanding Arsenic Contamination in Agricultural Soils and Lake Sediments from Papallacta Rural Parish, Northeastern Ecuador, via Ecotoxicology Factors, for Environmental Embasement

et al. 2023

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The concentration of arsenic (As), considered a toxic and carcinogenic metalloid, in agricultural soils has become a global challenge. Sources of arsenic in soils can be both anthropogenic and natural. Contaminated water is used for the irrigation of crops and vegetables, and therefore it is the main pathway for arsenic to enter the human food chain, creating a potential health risk. This study evaluated the concentrations of arsenic in agricultural soils in the rural parish of Papallacta, located 67 km east of the city of Quito, Northeastern Ecuador, and constitutes an analysis of the problem of arsenic in agricultural soils. Shallow groundwater and geothermal water discharges laced with arsenic are frequently used for irrigation and have raised the level of arsenic in agricultural soils. This work is focused on evaluating the environmental quality and contamination of agricultural soils through environmental quality indices such as geo-accumulation index, enrichment, and contamination factor. The average arsenic levels in the agricultural soils of the four studied areas fluctuate between 20.4 and 43.0 mg kg−1, while in the sediments of the Papallacta Lake, higher values were found in the range between 16.8 and 102.4 mg kg−1; all of which exceed the permissible limit by the Ecuadorian Environmental Legislation for agricultural use (12 mg kg−1). The results of the study in the five studied sites of the Papallacta civil parish indicate low to moderate levels of arsenic enrichment, soils enriched by bedrock, and moderate to considerable contamination.

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“…Previous studies have suggested that SOC accumulation and persistence in mineral soils result from interactions between organic matter (OM) and Fe and Al oxides or oxyhydroxides (Kleber et al, 2015;Hall and Thompson, 2021;Shimada et al, 2022). Other studies pointed toward the relevance of associations between OM and mineral surfaces via exchangeable cations (Nitzsche et al, 2017;Rasmussen et al, 2018;Rowley et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Storage and persistence of organic carbon in the upper three meters of soil under arable and native prairie land use

Anuo,

Li,

Moreland

et al. 2024

Preprint

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Aims - Land use change from native grasslands to arable lands globally impacts soil ecosystem functions, including the storage of soil organic carbon (SOC). Understanding the factors affecting SOC changes in topsoil and subsoil due to land use is crucial for effective mitigation strategies. We determined SOC storage and persistence as affected by land use change from native prairies to arable lands.Methods - We examined SOC stocks, soil δ13C and ∆14C signatures, microbial community (bacteria and fungi), and soil mineral characteristics under native prairies and long-term arable lands (i.e., > 40 years) down to 3 m in the U.S. Midwest.Results - Native prairie soils had higher SOC stocks in the A horizon and 0–50 cm depth increment than arable soils. For both land use types, the δ13C and ∆14C values significantly decreased with depth, with the latter pointing towards highly stabilized SOC, especially in the B- and C-horizons. Analysis of microbial communities indicated that the diversity of bacteria and fungi decreased with soil depth. The content of oxalate soluble Al appeared to be the single most important predictor of SOC across horizons and land use types.Conclusion - Our data suggest that most SOC gains and losses and transformation and translocation processes seem to be restricted to the uppermost 50 cm. Increasing SOC retention in A and B horizons within the 0–50 cm depth would enhance organic material serving as substrate and nutrients for microbes and plants (A horizon) and facilitate long-term SOC storage in subsoil (B horizon).

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Millennium timescale carbon stability in an Andisol: How persistent are organo-metal complexes?

Cited by 5 publications

References 61 publications

Ultisols with Unique Soil Properties and their Implications in Carbon Enhancement Strategies for Indian Tropical Soils

Ultisols with Unique Soil Properties and their Implications in Carbon Enhancement Strategies for Indian Tropical Soils

Assessing and Understanding Arsenic Contamination in Agricultural Soils and Lake Sediments from Papallacta Rural Parish, Northeastern Ecuador, via Ecotoxicology Factors, for Environmental Embasement

Storage and persistence of organic carbon in the upper three meters of soil under arable and native prairie land use

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