A pore-scale investigation of soil aggregate structure responding to freeze-thaw cycles using X-ray computed microtomography

Zhao, Yun‐Duo; Hu, Xia

doi:10.1007/s11368-023-03539-2

Cited by 8 publications

(1 citation statement)

References 39 publications

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“…Soil aggregate is the basic unit of soil structure (Shen et al 2022), and serve essential functions in regulating soil hydrothermal conditions and stability, as well as maintaining soil nutrients, facilitating plant growth, and influencing biological activities (Six et al 2004, Zhao andHu 2023). Some studies have shown that the physical protection in aggregate is one of the key mechanisms for conserving soil organic carbon (SOC) (Tang et al 2016, Xiao et al 2019.…”

Section: Introductionmentioning

confidence: 99%

Effects of freeze-thaw cycles on the size distribution and stability of soil aggregate in the permafrost regions of the Qinghai-Tibetan Plateau

Dong,

Gu,

Jia

et al. 2023

Environ. Res. Commun.

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As the basic units of soil structure, soil aggregate are essential for maintaining soil stability. Intensified freeze-thaw cycles have deeply affected the size distribution and stability of aggregate under global warming. To date, we are still lacking about the effect of freeze-thaw cycles on aggregate in the permafrost regions of the Qinghai-Tibetan Plateau (QTP). Therefore, we investigated the effects of diurnal freeze-thaw cycles and seasonal freeze-thaw processes on soil aggregate by in-situ studies. Our results showed that the durations of thawing and freezing periods in the 0-10 cm soil layer were longer than in the 10-20 cm soil layer, while the opposite for completely thawed and frozen periods. Freeze-thaw strength was greater in the 0-10 cm layer than that in the 10-20 cm layer. The diurnal freeze-thaw cycles might not have significant effect on the size distribution and stability of aggregate. However, < 0.25 mm fraction dominated wet sieving aggregate with the highest proportion during the thawing period, while the proportions of 0.5-1 mm and 1-3 mm fractions reached the highest during the completely frozen period in the 0-20 cm layer (P < 0.05). Likewise, the mean weight diameter and water-stable aggregate were decreased during the thawing period compared with other periods, which were influenced by soil microbial biomass carbon and belowground biomass. Hence, the seasonal freeze-thaw processes destroyed macro-aggregate (> 0.25 mm) and reduced aggregate stability. Our study has a scientific guidance for evaluating the effects of freeze-thaw cycles on aggregate and provides a theoretical basis for further exploration on soil and water conservation in the permafrost regions of the QTP.

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Section: Introductionmentioning

confidence: 99%

Effects of freeze-thaw cycles on the size distribution and stability of soil aggregate in the permafrost regions of the Qinghai-Tibetan Plateau

Dong,

Gu,

Jia

et al. 2023

Environ. Res. Commun.

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Soil Open Pore Structure Regulates Soil Organic Carbon Fractions of soil Aggregates under Simulated Freeze‑Thaw Cycles as Determined by X‑ray Computed Tomography

Wu,

2024

J Soil Sci Plant Nutr

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Soil pore structure may affect microbial communities involved in carbon cycling during thaw slumps development

Zhao,

2025

Applied Soil Ecology

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A pore-scale investigation of soil aggregate structure responding to freeze-thaw cycles using X-ray computed microtomography

Cited by 8 publications

References 39 publications

Effects of freeze-thaw cycles on the size distribution and stability of soil aggregate in the permafrost regions of the Qinghai-Tibetan Plateau

Effects of freeze-thaw cycles on the size distribution and stability of soil aggregate in the permafrost regions of the Qinghai-Tibetan Plateau

Soil Open Pore Structure Regulates Soil Organic Carbon Fractions of soil Aggregates under Simulated Freeze‑Thaw Cycles as Determined by X‑ray Computed Tomography

Soil pore structure may affect microbial communities involved in carbon cycling during thaw slumps development

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