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This article in SSSAJ

  1. Vol. 44 No. 5, p. 951-955
     
    Received: Mar 26, 1979
    Published: Sept, 1980


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doi:10.2136/sssaj1980.03615995004400050015x

Adsorption of Phosphate and Water-extractable Soil Organic Material by Synthetic Aluminum Silicates and Acid Soils1

  1. T. L. Yuan2

Abstract

Abstract

Three synthetic Al silicates with different Si/Al ratios and soil samples from a Eutrandept, a Paleudult, and a Haplaquod, were separately treated with P and hot water-extractable soil organic materials. The Al silicate with the lowest Si/Al ratio retained the most P but the least organic materials. The Paleudult which had a lower P adsorption capacity retained more organic matter than the Eutrandept. The Haplaquod had the lowest P and organic matter retention.

Pretreatment of soils with organic material had varied effects on subsequent P adsorption. Pretreatment of soils with P reduced the adsorption of organic material, but at all organic matter levels the P adsorption was constant.

The findings suggested that the sites for organic matter and P adsorption may differ, but certain sites seem to adsorb both P and organic matter.

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