Dissolution of phosphorus into pore-water flowing through an organic soil

摘要: Abstract Understanding dissolution and transport of phosphorus (P) from organic soils in agricultural fields restored wetlands is critical for devising management strategies to mitigate P losses. The objective this study was evaluate the water flowing through vadose zone-shallow ground continuum an soil. Three 90 cm × 50 cm × 8 cm flow cells were uniformly packed with soil material a Ponzer muck (Terric Haplosaprists) collected area that had been production at least 30 years. instrumented solution samplers platinum-tipped redox electrodes approximately 5 cm below simulated table (WT), capillary fringe (CF) 5 20 cm above WT collect monitor reduction potential (Eh), respectively. Distilled continuously supplied constant rates 1.2, 2.4, 3.6 L d− 1 one end, drained other end while maintaining 12 cm bottom midpoint each cell. Phosphorus concentration outflow consistently USEPA quality criteria 0.1 mg L− 1. Changes pore-water velocity did not alter amounts leached within time frame experiment. Dissolved concentrations both significantly higher than WT. This observation indicated out only saturated zone but also lower part CF. These results suggest controlling height limit saturation enriched surficial soils, considering contribution CF, may be effective tool limiting export wetland sited on former fields.