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Alkalization intensifies soil available phosphorus limitation through enhanced fixation compared to salinization
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DOI：10.1016/j.geoderma.2026.117984.png)
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Abstract
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• Salt type, not intensity alone, dictates the bottleneck of phosphorus (P) availability. • Alkalization caused stronger P availability limitation than salinization by shifting P from labile to occluded pools. • Stress redistributes macroaggregate-P toward silt + clay, especially under soda-type soils. • Soda-type soils show stronger P adsorption and weaker desorption than chloride-type soils.
Keywords:
Saline-alkali soils
Phosphorus availability
Salt-type-associated soil systems
Soil phosphorus fractions
Soil aggregates
Phosphorus adsorption–desorption
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