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<p>The availability of phosphorus (P), a crucial component for soil fertility, is usually restricted in hydromorphic soils due to complex interactions with iron (Fe) under dynamic redox circumstances. Additionally, it clarifies how P dynamics and spatial distribution in hydromorphic soils are influenced by redox-driven iron and phosphorus interactions as well as soil physicochemical characteristics. This study investigates the interplay between iron dynamics and phosphorus mobilization in hydromorphic soils along the Day Valley, upstream from the Beni Moussa perimeter, Tadla Plain, Morocco. We used remote sensing, GIS, and multivariate statistical analyses to find that ferrous iron (Fe<sup>2</sup>⁺) dominates under reductive conditions, enhancing phosphorus solubilization and mobility. Higher Fe<sup>2</sup>⁺ levels downstream are coupled with higher phosphorus availability, whereas oxidized soils have higher phosphorus fixation. Pearson correlation analysis reveals a moderate positive relationship (r = 0.49) between total iron and phosphorus, which was concluded as iron-phosphorus interactions. However, a strong negative relationship (r = −&#xa0;0.75) between phosphorus and calcium carbonate (CaCO3) reveals that high CaCO3 levels restrict phosphorus availability. Our work highlights the influence of redox conditions and other soil parameters, i.e., CaCO3 and cation exchange capacity (CEC), on phosphorus dynamics. Remote sensing, Geographic Information Systems (GIS), multivariate statistical analyses, Principal Component Analysis (PCA), and Hierarchical Cluster Analysis (HCA) reveal promising methodologies for monitoring nutrient availability in hydromorphic soils and gaining knowledge for improved soil fertility management.</p>

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Assessing the relationship between iron behavior and phosphorus in hydromorphic soils: the day Valley case, Tadla Plain, Morocco

  • 期刊论文

  • 发表日期：

    2025年4月29日

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  • Abdessalam Salmi,
  • Mohamed El Baghdadi,
  • Abdessamad Hilali,
  • Widad Ennaji,
  • Hassan Mosaid

摘要

The availability of phosphorus (P), a crucial component for soil fertility, is usually restricted in hydromorphic soils due to complex interactions with iron (Fe) under dynamic redox circumstances. Additionally, it clarifies how P dynamics and spatial distribution in hydromorphic soils are influenced by redox-driven iron and phosphorus interactions as well as soil physicochemical characteristics. This study investigates the interplay between iron dynamics and phosphorus mobilization in hydromorphic soils along the Day Valley, upstream from the Beni Moussa perimeter, Tadla Plain, Morocco. We used remote sensing, GIS, and multivariate statistical analyses to find that ferrous iron (Fe2⁺) dominates under reductive conditions, enhancing phosphorus solubilization and mobility. Higher Fe2⁺ levels downstream are coupled with higher phosphorus availability, whereas oxidized soils have higher phosphorus fixation. Pearson correlation analysis reveals a moderate positive relationship (r = 0.49) between total iron and phosphorus, which was concluded as iron-phosphorus interactions. However, a strong negative relationship (r = − 0.75) between phosphorus and calcium carbonate (CaCO3) reveals that high CaCO3 levels restrict phosphorus availability. Our work highlights the influence of redox conditions and other soil parameters, i.e., CaCO3 and cation exchange capacity (CEC), on phosphorus dynamics. Remote sensing, Geographic Information Systems (GIS), multivariate statistical analyses, Principal Component Analysis (PCA), and Hierarchical Cluster Analysis (HCA) reveal promising methodologies for monitoring nutrient availability in hydromorphic soils and gaining knowledge for improved soil fertility management.