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Wetland soils may act as sinks for phosphorus from agricultural soils but P sorption is sensitive to soil redox conditions. When soils become flooded and anoxic, Fe III is reduced and P sorption decreases. To get improved knowledge about the relationship between redox state and P solubility under field conditions, a grid of 4 × 5 sampling points laid out in an Fe-rich meadow soil...
Re-established riparian wetlands used to mitigate nitrogen (N) loss from agricultural soils to surface water may lose phosphorus (P) from the top soils that often have received fertilizers. This could lead to eutrophication of lakes and estuaries. For a 2-year period we established mass balances of N and P in two restored riparian wetlands of ∼0.6ha situated on mineral soil. Monitoring began 5 years...
Despite the high priority of wetland restoration as the primary measure to reduce agricultural nutrient loads, it is also widely recognized that wetlands restored on former agricultural land could potentially release accumulated phosphorus (P) and become a source of eutrophication. Simulating the upward percolation of groundwater with variable O 2 content and flow rate, we investigated the...
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