Sorption of phosphorus by the iron oxide-impregnated filter paper (P i soil test) embedded in soils
Plant and Soil(1990)
摘要
Incubation experiments were carried out to evaluate the feasibility of extracting phosphorus from soil by embedding iron oxide-impregnanted filter paper strips (Pi strips) in soils having a wide range in pH, texture, and extractable-P contents. Under flooded conditions, the amount of P extracted by the Pi strips increased with the period of submergence and embedding time of the Pi strips. Under unsaturated conditions, the Pi strips were found to extract P from soils over a wide range in moisture conditions; however, keeping the soil at moisture level between saturation and field capacity was found to result in maximal sorption of P by the strips. An embedding time of 16 h was found to be adequate.
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关键词
extraction by embedding strips,in situ evaluation,iron oxide paper (Pi) strips,moisture effect on P extracted,Pi soil P test
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