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Availability and Surface Runoff of Phosphorus from Compost Amended Mid-Atlantic Soils

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dc.contributor.authorSpargo, John Thomasen
dc.contributor.committeechairEvanylo, Gregory K.en
dc.contributor.committeememberMullins, Gregory L.en
dc.contributor.committeememberAlley, Marcus M.en
dc.contributor.departmentCrop and Soil Environmental Sciencesen
dc.date.accessioned2014-03-14T21:26:33Zen
dc.date.adate2005-01-07en
dc.date.available2014-03-14T21:26:33Zen
dc.date.issued2004-12-14en
dc.date.rdate2008-01-07en
dc.date.sdate2005-01-03en
dc.description.abstractThe accumulation of P in soil from land-applied biosolids and manure increases the risk for P enrichment of agricultural runoff. Transport of these residuals to areas where P may be efficiently utilized is necessary to reduce the threat to water quality. Composting can improve biosolids and manure handling characteristics to make their transportation more feasible; however, little is known about P dynamics in compost-amended soil. We investigated the factors controlling P solubility and plant availability in two soils, a Kempsville fine sandy loam (Typic Hapludult) and a Fauquier silty clay loam (Ultic Hapludalf), amended with one of 4 composts (2 biosolids composts and 2 poultry litter - yard waste composts), poultry litter, or inorganic P (as KH2PO4) in incubation and greenhouse pot studies. We also compared the effects of compost, poultry litter and commercial fertilizer on surface P runoff from a Fauquier silty clay loam that had received compost, poultry litter, or commercial fertilizer for 5 years. Organic amendments with higher concentrations of Fe, Al, and Ca had lower relative P solubility/availability. Phosphorus solubility in the Kempsville fine sandy loam, having far lower native P binding capacity, was more affected by Fe, Al, and Ca applied with the organic amendments. The concentration of P in runoff from the compost treatments was higher; however, infiltration was increased and runoff decreased so the mass loss of P and sediment was lower. Improved soil physical properties associated with compost applications aid to limit P runoff.en
dc.description.degreeMaster of Scienceen
dc.identifier.otheretd-01032005-092600en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-01032005-092600/en
dc.identifier.urihttp://hdl.handle.net/10919/40532en
dc.language.isoenen
dc.publisherVirginia Techen
dc.relation.haspartETD_Final.pdfen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectpoultry litteren
dc.subjectphosphorus runoffen
dc.subjectcomposten
dc.subjectbiosolidsen
dc.titleAvailability and Surface Runoff of Phosphorus from Compost Amended Mid-Atlantic Soilsen
dc.typeThesisen
thesis.degree.disciplineCrop and Soil Environmental Sciencesen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.levelmastersen
thesis.degree.nameMaster of Scienceen

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