State Water Resources Research Institute Program

Project ID: 2008VT36B
Title: Improvement of Phosphorus Load Estimates through the use of Enzyme-Hydrolysis Measures of Phosphorus Bioavailability
Project Type: Research
Start Date: 3/01/2009
End Date: 2/28/2010
Congressional District: First
Focus Categories: Sediments
Keywords: phosphorus, P index, enzyme, labile, soil test
Principal Investigator: Hill, Jane
Federal Funds: $ 40,005
Non-Federal Matching Funds: $ 27,578
Abstract: Microorganisms alter the forms of phosphorus forms in soils and sediments over time. Prediction of this labile phosphorus is complex and not well understood. This proposal endeavors to aid in the prediction of phosphorus migration off-site through the application of enzymatic assays to assess the labile nature of phosphorus in soils and sediments. Enzyme hydrolysis assays have been applied to dairy manures with success. An intensive assessment of soils and sediments from a variety of soil types will be conducted. This study will: 1. Adapt the enzyme assay soils and sediments samples and 2. Provide an option for soil scientists who wish to use a labile phosphorus measure in the Vermont Phosphorus Site Index as well as other models of phosphorus transport.

Progress/Completion Report, 2008, PDF
Progress/Completion Report, 2009, PDF

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