Phosphorus dynamics in some Irish soils : the influence of laboratory drying, soil characteristics and season
Citation:David, 1979- Styles, 'Phosphorus dynamics in some Irish soils : the influence of laboratory drying, soil characteristics and season', [thesis], Trinity College (Dublin, Ireland). Department of Geology, 2005, pp 311
Styles, David TCD THESIS 7400 Phosphorus dynamics.pdf (PDF) 202.0Mb
Phosphorus (P) is a nutrient that is important in hmiting biological growth in fresh waters, and desorption of P from soils is thought to be an important driver for the eutrophication of freshwater bodies. Previous studies have linked land use, soil P contents and general soil characteristics to soil P desorption. This project aims to assess the potential to use readily available soil type and agronomic soil P (Morgan P) data to predict soil P desorption - as measured by water-extractable P (Pw) and bioavailable P (Pfeo) - for a range of Irish soils. The effects of the standard practice of sample drying prior to desorption analyses, and implications for assessing soil P desorption risk in catchment P loss models, are explored. Dried samples of 35 soils collected from a range of soil types and land uses within the Lough Mask catchment in County Mayo were analysed for numerous soil characteristics and P sorption/desorption. Sub-samples of these samples were also maintained at the moisture content they contained during sampling (moist samples), and analysed for P desorption. Moist soil samples collected monthly from 11 sites in the Mask catchment were analysed for a range of characteristics and P sorption/desorption over a period of 12-16 months. For four of these months, representing different seasons, dried samples were subjected to the same analyses. Dried soil samples from three parent research project partners’ catchments, one in N. Ireland and two in Galicia, Spain, were also analysed and compared with Mask catchments soils. Extensive stream-water chemistry data for the Mask catchment, obtained by parent research project co-workers, enabled an assessment of the relationship between soil P characteristics and water P concentrations.
Author: Styles, David, 1979-
Advisor:Coxon, Catherine E.
Publisher:Trinity College (Dublin, Ireland). Department of Geology
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Type of material:thesis
Availability:Full text available