Soil Phosphorus Extracted by Three Anion Exchange Membranes Compared to Water-Soluble and Truog-Extractable Phosphorus

Abstract

Effects of different kinds of anion exchange membrane (AEM) on soil P extracted by AEM (AEM P) were investigated in three soils (Cumulic Andosol, Yellow soil, and Gray Lowland soil). There was no significant difference in AEM P among the AEMs tested (BDH-Prolabo 551642S, AGC Engineering Selemion AMT, and AGC Engineering Selemion AMV). The AEM P was greater than water-soluble P in all soils. Although AEM P was greater than Truog-extractable P in Cumulic Andosol, the reverse was true in the Yellow soil and Gray Lowland soil.

Keywords:

• Anion exchange membrane
• Hedley method
• soil phosphorus
• water-soluble

Acknowledgments

The author is grateful to AGC Engineering, Co., Ltd., for Selemion AMT and Selemion AMV. The author also thanks Yumiko Nemoto for her laboratory assistance.