title: Nitrogen and phosphorus distribution in a constructed wetland fed with treated swine slurry from an anaerobic lagoon.
abstract: Nitrogen and phosphorus distribution in a constructed wetland fed with treated swine slurry from an anaerobic lagoon were studied. The methodology considered a daily meteorological monitoring site. During 2011 to 2012, water, soil and plants (Schoenoplectus californicus (C.A. Méyer) Sójak, Typha angustifolia (L.)) were seasonally sampled (spring and fall) into the constructed wetland. During study period, results showed that rainfall was the main factor of maintenance hydraulic conditions, while evapotranspiration was driver of variations in water storage level. Nitrogen and phosphorus removal from the water phase were up to 54% and 37%, respectively. Onto soil were adsorbed over 70% nitrogen and 65% phosphorus. Phosphorus was less mobile than nitrogen, since it was bound to oxides Fe-Mn. Inorganic nitrogen species were affected by level water and seasonal vegetable maturation. During spring, N-NH4(+) was the predominant soil species, while in the fall, N-NO3(-) was dominant near the belowground part of Sc and NH4(+) near to the belowground zone of Ta. In addition, nutrients uptake was less than 30% with 64% aboveground-spring and 85% belowground-fall for both plants. Findings showed nitrification process evidences when water levels are below 0.1 m.
authors.affiliation: a Environmental Engineering and Biotechnology Group, Environmental Science Faculty and EULA-Chile Center , University of de Concepción , Concepción , Chile.
authors.forename: Cristina A
authors.initials: CA
authors.lastname: Villamar
authors.forename: Diego
authors.initials: D
authors.lastname: Rivera
authors.forename: Maria E
authors.initials: ME
authors.lastname: Neubauer
authors.forename: Gladys
authors.initials: G
authors.lastname: Vidal
mesh_terms: D000693:Anaerobiosis; D000818:Animals; D002677:Chile; D029785:Cyperaceae / Q000254:growth & development; D008372:Manure / Q000382:microbiology; D017672:Nitrogen Compounds / Q000032:analysis* / Q000302:isolation & purification; D017553:Phosphorus Compounds / Q000032:analysis* / Q000302:isolation & purification; D012621:Seasons; D013552:Swine; D032401:Typhaceae / Q000254:growth & development; D014865:Waste Disposal, Fluid / Q000379:methods*; D014874:Water Pollutants, Chemical / Q000032:analysis* / Q000302:isolation & purification; D053833:Wetlands
chemical_list: D008372:Manure; D017672:Nitrogen Compounds; D017553:Phosphorus Compounds; D014874:Water Pollutants, Chemical
keywords: Nitrogen/phosphorous distribution; Schoenoplectus californicus (C.A. Méyer) Soják; Typha angustifolia (L.); swine slurry