Testing mechanisms underlying the Hedley sequential phosphorus extraction of soils

• Published in: Journal of plant nutrition and soil science Vol. 182; no. 4; pp. 570 - 577
• Main Authors: Klotzbücher, Anika, Kaiser, Klaus, Klotzbücher, Thimo, Wolff, Maximilian, Mikutta, Robert
• Format: Journal Article
• Language: English
• Published: Weinheim Wiley Subscription Services, Inc 01.08.2019
• Subjects: allophane; Aluminum; Aluminum hydroxide; Anion exchange; anion exchange resins; Anion exchanging; Binding; Bioavailability; Calcium; Dissolution; Emission analysis; Emission spectroscopy; ferrihydrite; Forest soils; Fractionation; Goethite; Hedley fractionation; hydrochloric acid; Hypotheses; Inductively coupled plasma; iron; Iron constituents; Minerals; mineral‐phosphorus association; Optical emission spectroscopy; Orthophosphate; orthophosphates; Phosphorus; phosphorus extractability; Phytic acid; RNA; sequential phosphorus extraction; Sodium bicarbonate; Sodium hydroxide; soil sampling; Soils; Spectroscopy
• ISSN: 1436-8730; 1522-2624
• DOI: 10.1002/jpln.201800652

The Hedley fractionation has become the preeminent measure for estimating the bioavailability of phosphorus (P) in soils. However, mechanisms underlying P extractability have never been tested. We hypothesize that P sequentially extracted by individual steps can either be referred to a specific mine...