Nitrous Oxide Emissions and Nitrate Leaching from Spring- and Fall-Applied Digestate, Raw Dairy Manure and Urea

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dc.contributor.advisorWagner-Riddle, Claudia
dc.contributor.authorSchwager, Emily A.
dc.date.accessioned2015-04-15T13:50:00Z
dc.date.available2015-04-15T13:50:00Z
dc.date.copyright2015-04
dc.date.created2015-03-31
dc.date.issued2015-04-15
dc.degree.departmentSchool of Environmental Sciencesen_US
dc.degree.grantorUniversity of Guelphen_US
dc.degree.nameMaster of Scienceen_US
dc.degree.programmeEnvironmental Sciencesen_US
dc.description.abstractThe effect of N source (digestate and raw dairy manure) and application timing (spring- and fall-applied) on nitrous oxide (N2O) emissions and nitrate (NO3) leaching was evaluated. These N sources, as well as urea, were incorporated into plots with contrasting soil textures (sandy-loam vs. clay). Measurements of leached NO3 and N2O fluxes were collected using a tile drainage system, zero-tension lysimeters, and chambers, respectively. N2O flux measurements were also used to validate the agro-ecosystem model, DAYCENT. Overall, there was no difference in N2O emissions between N sources in the clay field but digestate had significantly higher N2O emissions than raw dairy manure in the sandy-loam field. Treatments with lower N2O emissions tended to have higher NO3 leaching. There was no overall effect of timing on N2O emissions, but fall applications had higher NO3 leaching. DAYCENT’s effectiveness at simulating N2O fluxes could be improved to better assess management practices.en_US
dc.description.sponsorshipThe Canadian Dairy Commission
dc.description.sponsorshipOntario Ministry of Agriculture, Food and Rural Affairs
dc.description.sponsorshipUniversity of Guelph's School of Environmental Sciences, Agriculture and Agri-Food Canada's (AAFC) Agricultural Greenhouse Gases Program
dc.description.sponsorshipAAFC's Research Affiliate Program
dc.identifier.urihttp://hdl.handle.net/10214/8749
dc.language.isoenen_US
dc.publisherUniversity of Guelphen_US
dc.rights.licenseAll items in the Atrium are protected by copyright with all rights reserved unless otherwise indicated.
dc.subjectNitrous Oxideen_US
dc.subjectNitrateen_US
dc.subjectLeachingen_US
dc.subjectGreenhouse Gas Emissionsen_US
dc.subjectDigestateen_US
dc.subjectAnaerobically Digested Dairy Manureen_US
dc.titleNitrous Oxide Emissions and Nitrate Leaching from Spring- and Fall-Applied Digestate, Raw Dairy Manure and Ureaen_US
dc.typeThesisen_US
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