NDLI: Evolution and phosphorus fractionation in saline Spolic Technosols flooded with eutrophic water

Content Provider	Springer Nature Link
Author	González Alcaraz, María Nazaret Álvarez Rogel, José María Cervantes, Antonio Egea, Consuelo Conesa, Héctor Miguel
Copyright Year	2012
Abstract	The aim of this study was to evaluate the behaviour of P in saline Spolic Technosols flooded with eutrophic water, with and without plant rhizosphere, in order to assess the role of these soils as sinks or sources of this nutrient.Samples were taken from basic (pH ~7.8), carbonated and acidic (pH ~6.2), de-carbonated soils of salt marshes polluted by mine wastes. Three treatments were assayed: pots with Sarcocornia fruticosa, pots with Phragmites australis and pots without plants (bare soil). The pots were flooded for 15 weeks with eutrophic water (PO 4 3− ~6.92 mg L$^{−1}$) and pH, Eh and water-soluble organic carbon and PO 4 3− concentrations were monitored in the soil solution. A soil P fractionation was applied before and after the flooding period.The PO 4 3− concentration in the soil solution decreased rapidly in both soils, with and without plant, being diminished by 80–90 % after 3 h of flooding. The Fe/Mn/Al oxides and the Ca/Mg compounds played an important role in soil P retention. In pots with S. fruticosa, the reductive conditions due to flooding induced P release from metal oxides and P retention to Ca/Mg compounds. In turn, P. australis may have favoured the release of P from carbonates, which was transferred to Fe/Mn/Al compounds.The retention of P by the soil was the main mechanism involved in the removal of PO 4 3− from the eutrophic flooding water but to evaluate the capacity of these systems as long-term P sinks, the combined effect of metals, Ca/Mg compounds and specific plant species should be considered.
Starting Page	1316
Ending Page	1326
Page Count	11
File Format	PDF
ISSN	14390108
Journal	Journal of Soils and Sediments
Volume Number	12
Issue Number	9
e-ISSN	16147480
Language	English
Publisher	Springer-Verlag
Publisher Date	2012-07-17
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Mar Menor Phosphorus fractionation Phragmites australis Redox potential Salt marsh soils Sarcocornia fruticosa Soil Science & Conservation Environment Environmental Physics
Content Type	Text
Resource Type	Article
Subject	Stratigraphy Earth-Surface Processes

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