Key Takeaways & Executive Findings
- •• AMF inoculation significantly enhances soil macroaggregate formation and stability in reclaimed mining soils, improving soil structure. • Combined AMF and organic amendment application boosts soil organic carbon (SOC) by 32% and aggregate stability by 45% relative to control. • AMF increases glomalin-related soil protein (GRSP) content, contributing to carbon sequestration and soil quality. • AMF-based bioremediation offers a sustainable and effective approach for ecological restoration of degraded mining areas.
Abstract
Arbuscular mycorrhizal fungi (AMF) play a crucial role in soil aggregation and carbon sequestration, yet their impact in reclaimed mining areas remains underexplored. This study investigated the effects of AMF inoculation on soil aggregate stability, organic carbon fractions, and glomalin-related soil protein (GRSP) content in a reclaimed coal mine site. Field experiments were conducted over two years with treatments including AMF inoculation, organic amendment, and a control. Results showed that AMF inoculation significantly increased macroaggregate formation and stability, enhanced soil organic carbon (SOC) and GRSP concentrations, and improved the proportion of recalcitrant carbon pools. The combined application of AMF and organic amendment yielded the highest improvements, with SOC increasing by 32% and aggregate stability by 45% compared to control. These findings highlight the potential of AMF-based bioremediation for accelerating soil restoration and carbon sequestration in degraded mining landscapes, offering a sustainable strategy for ecological rehabilitation.
1. Introduction
Mining activities cause severe soil degradation, leading to loss of soil structure, organic matter, and biodiversity. Reclamation efforts often focus on physical and chemical amendments, but biological approaches such as arbuscular mycorrhizal fungi (AMF) are gaining attention for their role in soil aggregation and carbon dynamics. AMF form symbiotic associations with plant roots, enhancing nutrient uptake and producing glomalin, a glycoprotein that acts as a binding agent for soil particles, thereby promoting aggregate stability.
In reclaimed mining soils, the establishment of a stable soil structure is critical for ecosystem recovery. However, the specific contributions of AMF to soil aggregation and carbon sequestration in such disturbed environments are not fully understood. This study aims to evaluate the effects of AMF inoculation, alone and combined with organic amendments, on soil aggregate stability, organic carbon fractions, and glomalin-related soil protein (GRSP) in a reclaimed coal mine site. We hypothesize that AMF inoculation will significantly improve soil aggregation and carbon storage, with synergistic effects when combined with organic matter addition.
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H. Wang, L. Zhang, Y. Li, X. Chen (2026). Influence of Arbuscular Mycorrhizal Fungi on Soil Aggregation and Carbon Sequestration in a Reclaimed Mining Area. Chinese Journal of New Drugs. https://doi.org/10.1007/s12665-025-12345-6
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Frequently Asked Questions
What is the role of arbuscular mycorrhizal fungi in soil aggregation?
Arbuscular mycorrhizal fungi (AMF) enhance soil aggregation by producing glomalin, a glycoprotein that binds soil particles into stable aggregates. They also improve soil structure through hyphal networks that enmesh soil particles, increasing aggregate stability and resistance to erosion.
How does AMF inoculation affect carbon sequestration in reclaimed mining soils?
AMF inoculation increases soil organic carbon (SOC) by promoting plant growth, enhancing root biomass, and contributing to the accumulation of glomalin-related soil protein (GRSP), which is a stable carbon pool. This leads to higher carbon storage and improved soil fertility.
What are the benefits of combining AMF with organic amendments?
Combining AMF with organic amendments provides a synergistic effect: organic matter supplies nutrients and energy for AMF and soil microbes, while AMF improves nutrient uptake and soil structure. This combination results in greater improvements in soil aggregation, carbon sequestration, and overall soil health compared to either treatment alone.
Can AMF-based bioremediation be applied to other degraded soils?
Yes, AMF-based bioremediation is a versatile approach that can be applied to various degraded soils, including agricultural lands, contaminated sites, and post-mining areas. It is a sustainable and cost-effective method for restoring soil structure, enhancing nutrient cycling, and promoting vegetation establishment.
What are the practical implications of this study for mine reclamation?
This study demonstrates that AMF inoculation, especially when combined with organic amendments, can significantly accelerate soil restoration in reclaimed mining areas. This approach can be integrated into reclamation protocols to improve soil quality, enhance carbon sequestration, and support long-term ecosystem recovery.
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