Ge et al. (2025) Freeze–Thaw-Driven Dynamics of Soil Water–Salt and Nitrogen: Effects and Implications for Irrigation Management in the Hetao Irrigation District

⚠️ Warning: This summary was generated from the abstract only, as the full text was not available.

Identification

• Journal: Water
• Year: 2025
• Date: 2025-10-16
• Authors: Weili Ge, Jiaqi Jiang, Chunli Su, Qing Zhang, Chunming Zhang, Yanlong Li, Xin Li, Jiajia Song, Yanjing Su
• DOI: 10.3390/w17202991

Research Groups

Not explicitly stated in the provided text. Likely agricultural research institutions or universities specializing in soil science, hydrology, and agricultural management, potentially located in China given the Hetao Irrigation District context.

Short Summary

This study investigated the synergistic transport mechanisms of soil water, salt, and nitrogen under freeze-thaw cycles in salinized farmlands. It found that freeze-thaw cycles drive upward salt accumulation and enhance nitrogen transformation, identifying optimal low-salinity and moderate-nitrogen irrigation strategies to mitigate salinization and improve nitrogen utilization.

Objective

• Investigate the mechanisms of soil water-salt and nitrogen transport under freeze-thaw cycles in salinized farmlands of the Hetao Irrigation District.
• Identify optimal strategies for sustainable agricultural management under these freeze-thaw conditions.

Study Configuration

• Spatial Scale: Field scale (salinized farmlands of the Hetao Irrigation District) and laboratory scale (undisturbed and repacked soil columns).
• Temporal Scale: Experimental duration covering 0 to 15 freeze-thaw cycles, focusing on short-term nitrogen transformation dynamics.

Methodology and Data

• Models used: Not explicitly stated.
• Data sources: Field monitoring data and laboratory simulation data obtained from undisturbed and repacked soil columns.

Main Results

• Freeze-thaw processes significantly drive salt redistribution in surface soil layers through phase changes of soil moisture.
• Increased freeze-thaw cycles reduce surface soil moisture content while promoting upward salt accumulation.
• Salt dynamics exhibit pronounced spatial heterogeneity and dependency on the irrigation source.
• Surface soil salinity levels are lower after irrigation compared to pre-irrigation levels.
• Freeze-thaw cycles enhance short-term soil nitrogen transformation and facilitate inorganic nitrogen accumulation.
• Low-salinity irrigation (S2) and moderate-nitrogen irrigation (N2) effectively reduce surface salt accumulation and improve nitrogen utilization efficiency.
• Moderate-nitrogen irrigation leads to higher mineralization rates, facilitating the release of inorganic nitrogen from the soil.

Contributions

• Reveals the synergistic transport mechanisms of water, salt, and nitrogen under freeze-thaw driving forces.
• Provides a scientific basis and practical pathway for sustainable agricultural management in cold arid irrigation districts.

Funding

Not explicitly stated in the provided text.

Citation

@article{Ge2025FreezeThawDriven,
  author = {Ge, Weili and Jiang, Jiaqi and Su, Chunli and Xie, Xianjun and Zhang, Qing and Zhang, Chunming and Li, Yanlong and Li, Xin and Song, Jiajia and Su, Yanjing},
  title = {Freeze–Thaw-Driven Dynamics of Soil Water–Salt and Nitrogen: Effects and Implications for Irrigation Management in the Hetao Irrigation District},
  journal = {Water},
  year = {2025},
  doi = {10.3390/w17202991},
  url = {https://doi.org/10.3390/w17202991}
}