IADO   05364
INSTITUTO ARGENTINO DE OCEANOGRAFIA
Unidad Ejecutora - UE
artículos
Título:
Stream Corridor Soil Phosphorus Availability in a Forested-Agricultural Mixed Land Use Watershed
Autor/es:
WEMPLE, BEVERLEY C.; PERILLO, VANESA L.; BALLING, COURTNEY; ROSS, DONALD S.; LEMIEUX, LIZA E.
Revista:
JOURNAL OF ENVIRONMENTAL QUALITY
Editorial:
AMER SOC AGRONOMY
Referencias:
Año: 2019 vol. 48 p. 185 - 192
ISSN:
0047-2425
Resumen:
Watershed land use affects nutrient and sediment export, particularly through streambank erosion, which can add to P export and contribute to eutrophication in downstream waterbodies. We characterized P of soils from four different land uses (32 sites) along streams in the Missisquoi River basin (Vermont, USA)-silage corn ( L.), hay meadow, emergent wetlands, and forest-and their corresponding streambanks. We measured total P (TP), pH 4.8 NH-acetate P, degree of P saturation (DPS), and soluble P. The latter three measurements were used as predictors of potential P bioavailability. Forest soils were relatively low in TP, whereas soils in corn, hay, and wetland were elevated (>1000 mg kg). With the exception of forests, the TP of the corresponding streambanks of each land use was statistically significantly lower than in the interior of the land use, while still higher than those in forests, suggesting a possible influence of land use on its adjacent streambank. The pH 4.8 NH-acetate P was low in nonagricultural land uses and all streambanks of different land uses, but higher than optimum for soils in cornfields and hayfields. The DPS averaged 36% in the cornfields, but