Skip to main content
ARS Home » Northeast Area » University Park, Pennsylvania » Pasture Systems & Watershed Management Research » Research » Publications at this Location » Publication #103070
Title: EFFECT OF BIOLOGICAL EXTRACTION ON SOIL P POOL STABILITY

Author
item Stout, William
item Sharpley, Andrew
item Weaver, Stefan

Submitted to: Agronomy Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: 8/13/1999
Publication Date: N/A
Citation: Stout, W.L., Sharpley, A.N., Weaver, S.R. 1999. Effect of biological extraction on soil inorganic phosphorus stability[abstract]. Agronomy Abstracts. p. 1.

Interpretive Summary:

Technical Abstract: Flue gas desulfurization (FGD) gypsum, a coal combustion by-product, can be used to reduce water extractable soil P, thereby reducing the potential for P export to surface waters. This reduction results from the conversion of readily desorbable P to less soluble Al- and Fe-bound soil P pools. The short-term effect of this conversion on plant available P is small, but the eeffect on plant available P over several cycles of biological extraction i not known. In a greenhouse experiment, we measured plant P extraction from three widely different soils treated with FGD gypsum and determined the extent to which P was being extracted from the various soil P pools. We also used iron oxide strips and a surrogate for plant P extraction from the treated soils. A comparison on the extent to which plants and iron oxide strips extract P from the various P pools will be presented.