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Phosphate Sorption in Relation to Extractable Iron and Aluminum in Spodosols
Author(s) -
Yuan G.,
Lavkulich L. M.
Publication year - 1994
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1994.03615995005800020013x
Subject(s) - sorption , podzol , oxalate , phosphate , soil water , chemistry , phosphorus , environmental chemistry , inorganic chemistry , environmental science , soil science , organic chemistry , adsorption
Phosphorus is an important plant nutrient and of concern from the environmental point of view. Numerous studies on the relationship between P sorption characteristics and other soil properties have been done; however, most of these studies do not include originally sorbed (oxalate‐extractable) P (P o ). Since P o accounts for 17 to 66% of the total sorption capacity (P o + X m , where X m is the P sorption maximum) in 43 Spodosol samples from British Columbia, Canada, it should not be ignored in P sorption models. The good correlations between oxalate‐extractable Fe and Al (Fe o + Al o ) and P sorption parameters (P o , X m , or P o + X m ) indicate amorphous Fe and Al oxides are the major P sorbents in the soils studied. Phosphorus sorption capacity is predictable from Al o and Fe o by two existing models. The relationship between organically complexed Al and P sorption parameters may be important in forest and soil management, since the organically complexed fraction is relatively easily altered if environmental factors or management practices change.