“Reactive Mineral Sink” drives soil organic matter dynamics and stabilization

npj Materials Sustainability, Journal Year: 2023, Volume and Issue: 1(1)

Published: Nov. 27, 2023

Abstract Reactive primary and secondary minerals play a critical role in the transformation stabilization of organic matter (OM) soil, aspect that has been largely overlooked existing literature. In this regard, we propose new model known as “reactive mineral sink” (RMS) to illustrate three mechanisms through which these drive bioprocessing, transformation, transport OM soil. Firstly, from biological perspective, reactive influence enzymatic microbial processing binding proteins or influencing structure communities. Secondly, chemical standpoint, have capacity adsorb and/or coprecipitate with it, leading more diverse distribution This distribution, turn, triggers catalysis redox reactions. Thirdly, on physical level, substantial impact soil architecture, aggregate dynamics, porosity development, hydrological processes. These changes then affect transport, reprocessing OM. The RMS provides conceptual framework underscores fundamental driving dynamics carbon (C) sequestration natural Furthermore, it promotes restoration biogeochemical processes ecological resilience. We advocate for implementation strategies based enhance C soils purposes rejuvenating health mitigating CO 2 emission.

Language: Английский

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Effect of biodegradable PBAT microplastics on the C and N accumulation of functional organic pools in tropical latosol

Environment International, Journal Year: 2023, Volume and Issue: 183, P. 108393 - 108393

Published: Dec. 17, 2023

Microplastics (MPs) pollution is becoming an emerging global stressor for soil ecosystems. However, studies on the impacts of biodegradable MPs C sequestration have been mainly based bulk quantity, without considering storage form C, its persistency and N demand. To address this issue, common poly (butylene adipate-co-terephthalate) (PBAT) was used as model, effects functional organic pools, including mineral-associated (MAOM), particulate (POM) dissolved matter (DOM), were investigated from novel coupled perspective stocks. After adding PBAT-MPs, contents POM-C, DOM-C, MAOM-C increased by 546.9%-697.8%, 54.2%-90.3%, 13.7%-18.9%, respectively. Accordingly, total 116.0%-191.1%. Structural equation modeling showed that pools regulated PBAT input microbial metabolism associated with enzymes. Specifically, debris could be disguised to promote POM formation, which main pathway accumulation. Inversely, DOM-C formation attributed product selective consumption in DOM-N. Random forest model confirmed N-activated (e.g., Nitrospirae) PBAT-degrading bacteria Gemmatinadetes) important taxa accumulation, key enzymes rhizopus oryzae lipas, invertase, ammonia monooxygenase. The accumulation related oligotrophic Chloroflexi Ascomycota) aggregate decreasing DOM-N 46.9%-84.3%, but did not significantly change other pools. Collectively, findings highlight urgency control nutrient imbalance risk labile loss recalcitrant enrichment avoid depressed turnover rate MPs-polluted soil.

Language: Английский

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Microbial adaption to stoichiometric imbalances regulated the size of soil mineral-associated organic carbon pool under continuous organic amendments

Geoderma, Journal Year: 2024, Volume and Issue: 445, P. 116883 - 116883

Published: April 23, 2024

Soil microorganisms play a key role in regulating soil organic carbon (SOC) accrual. Organic amendments with distinct stoichiometry may lead to imbalanced supply of (C), nitrogen (N), and phosphorus (P) the microbiome, causing changes microbial community composition their life strategies, as well enzyme production. However, response these imbalances whether adaptive strategies are related fate SOC pools remain largely unknown low-fertility paddy soil. To address this uncertainty, soils were sampled from 12-year experimental fertilisation trial under integrated application mineral fertilizers three types materials (green manure, rice straw, cattle manure). Stoichiometric between microbes available resources, activities, composition, linkages particulate (POC) mineral-associated (MAOC) C investigated. The results showed that despite equal input, strongest increase MAOC occurred smallest C:N imbalance C:P imbalance, suggesting alleviation N P limitation was inductive accrual stable fraction. Additional lower C: nutrient ratios shifted towards prevalence r-strategists, manure addition supporting copiotrophic bacteria green favouring fungi. Importantly, relative abundances Proteobacteria, Gemmatimonadetes, Actinobacteria belonging copiotrophs negatively but positively POC MAOC, while Chloroflexi, Basidiomycota Glomeromycota oligotrophs exhibited reversed relationships. In addition, greater associated an biomass decrease biomass-specific P-acquiring activity. Random forest analysis partial least squares path model revealed played important indirect shaping by concurrently biomass, production, whereas pool predominantly directly controlled proportion macroaggregates. These provide empirical evidence for stoichiometric control communities feedback pools, highlighting low C:nutrient ratio long-term storage persistence intensively managed soils.

Language: Английский

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Constraints on mineral-associated and particulate organic carbon response to regenerative management: carbon inputs and saturation deficit

Soil and Tillage Research, Journal Year: 2024, Volume and Issue: 238, P. 106008 - 106008

Published: Jan. 25, 2024

Language: Английский

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Contrasting processes of microbial anabolism and necromass formation between upland and paddy soils across regional scales

CATENA, Journal Year: 2024, Volume and Issue: 239, P. 107902 - 107902

Published: Feb. 23, 2024

Language: Английский

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Oilseed rape-rice rotation with recommended fertilization and straw returning enhances soil organic carbon sequestration through influencing macroaggregates and molecular complexity

Agriculture Ecosystems & Environment, Journal Year: 2024, Volume and Issue: 367, P. 108960 - 108960

Published: March 9, 2024

Language: Английский

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Perennial cropping systems increased topsoil carbon and nitrogen stocks over annual systems—a nine-year field study

Agriculture Ecosystems & Environment, Journal Year: 2024, Volume and Issue: 365, P. 108925 - 108925

Published: Feb. 9, 2024

Enhancing biomass yield simultaneously with soil carbon (C) sequestration is a key aim of climate-smart cropping systems. Perennialization believed to be suitable mitigation strategy for climate change the potential enhancing C stocks. Based on nine-year field experiment in Denmark, we measured changes and nitrogen (N) stocks, yield, stability three perennial (low-fertilized miscanthus, high-fertilized festulolium, no N-fertilized grass-legume mixture) two annual (continuous triticale maize) We found that topsoil (0–20 cm) 0–100 cm stocks N varied significantly between Over nine years, increased by an average 1.4 Mg ha−1 systems, while they decreased 3.4 The 6.8 systems 2.3 system, but 2.5 maize system. Topsoil 0.18 0.08 Changes did not differ Miscanthus, showed highest (17.1, 16.7, 16.4 year−1, respectively). There were significant differences among stability. This study demonstrated obtaining higher compared maintaining high supporting perennialization as promising option agriculture.

Language: Английский

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The influence of grazing intensity on soil organic carbon storage in grassland of China: A meta-analysis

The Science of The Total Environment, Journal Year: 2024, Volume and Issue: 924, P. 171439 - 171439

Published: March 2, 2024

Language: Английский

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Short-term warming supports mineral-associated carbon accrual in abandoned croplands

Nature Communications, Journal Year: 2025, Volume and Issue: 16(1)

Published: Jan. 2, 2025

Effective soil organic carbon (SOC) management can mitigate the impact of climate warming. However, response different SOC fractions to warming in abandoned croplands remains unclear. Here, categorizing into particulate and mineral-associated (POC MAOC) with physical fractionation, we investigate responses POC MAOC content temperature sensitivity (Q10) through a 3-year situ experiment (+1.6 °C) across 12 sites China (latitude: 22.33–46.58°N). Our results indicate that unchanged while significantly increases under changes are mainly influenced by root biomass microbial necromass changes, respectively. The Q10 is lower than regardless or control treatment, suggesting represents most persistent least vulnerable fraction within SOC. Collectively, sequestration stable be enhanced short-term Natural recovery generally benefits accrual croplands, but on this ecosystem authors showed enhances these lands.

Language: Английский

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Cereal-legume intercropping stimulates straw decomposition and promotes soil organic carbon stability

Science China Life Sciences, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 21, 2025

Language: Английский

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