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Unlike carbon, water, and nitrogen, phosphorus is not present in the atmosphere as a gas. Instead, most phosphorus in the ecosystem exists as compounds, such as phosphate ions (PO43-), found in soil, water, sediment and rocks. Phosphorus is often a limiting nutrient (i.e., in short supply). Consequently, phosphorus is added to most agricultural fertilizers, which can cause environmental problems related to runoff in aquatic ecosystems.
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Analyte Adsorption and Distribution01:09

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In certain chromatographic separations, solutes transfer between the mobile phase and the stationary phase via sorption, which typically refers to the process of adsorption. For many chromatographic systems, the sorption process often depends on the polarity of the compounds—an expression of the overall dipole moment within the molecule. During the separation process, there is competition between the solute and solvent for adsorption to the stationary phase. Highly polar compounds and...
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  9. Soil Physics
  11. Phosphorus Pool Distributions And Adsorption-desorption Characteristics Of Soil Aggregates In Cut Slopes Of A Permafrost Zone In The Qinghai-tibetan Plateau

Phosphorus pool distributions and adsorption-desorption characteristics of soil aggregates in cut slopes of a permafrost zone in the Qinghai-Tibetan Plateau

Tingting Chen1, Meihua Sheng1, Jingyao Xiao1

  • 1Key Laboratory of Bio-Resource and Eco-Environment of Ministry of Education, College of Life Sciences, State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Sichuan 610065, China.

The Science of the Total Environment
|October 12, 2024

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View abstract on PubMed

Summary
This summary is machine-generated.

Permafrost type significantly impacts soil phosphorus (P) distribution and P dynamics in alpine cut slopes. Understanding these P pools and adsorption is crucial for effective slope restoration in these sensitive environments.

Area of Science:

  • Soil Science
  • Geochemistry
  • Permafrost Science

Background:

  • Soil phosphorus (P) is vital for the restoration of cut slopes in permafrost regions.
  • Limited understanding of soil P pool distribution and adsorption-desorption in alpine cut slopes.

Purpose of the Study:

  • To investigate P pool distribution and P adsorption-desorption characteristics in alpine cut slopes across different permafrost types.
  • To correlate P pools with P adsorption-desorption behaviors.

Main Methods:

  • Analysis of total P (TP), available P (AP), labile P (LP), moderately labile P (MLP), and stable P (SP) in soil aggregates.
  • Assessment of P adsorption-desorption characteristics.
  • Comparison across perennially frozen (PF), seasonally frozen ground (SFG), and non-frozen soil (NFS) types.
Keywords:
Alpine areaCut slopesPermafrost typePhosphorus adsorption-desorption

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Main Results:

  • Permafrost type significantly affected P pool contents (TP, AP, LP, MLP, SP).
  • Inorganic P (IP) dominated over organic P (OP); NaHCO3-Po was the smallest fraction.
  • Stable P (SP) was generally higher than MLP and LP; LP varied significantly across permafrost types.
  • AP correlated with MLP and LP; SFG showed distinct P adsorption-low and desorption-high characteristics compared to PF and NFS.

Conclusions:

  • Permafrost conditions critically influence soil P dynamics in alpine cut slopes.
  • Findings provide a theoretical foundation for the ecological restoration of cut slopes in alpine permafrost regions.
Phosphorus pool
Soil aggregates