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Characterization of Anaerobic Digestates for their Nitrogen Fertility Value and Improved Nutrient Management

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dc.contributor.advisor Voroney, R. Paul
dc.contributor.author O'Reilly, Mary Christine
dc.date.accessioned 2014-05-07T16:26:57Z
dc.date.available 2014-05-07T16:26:57Z
dc.date.copyright 2014-04
dc.date.created 2014-04-17
dc.date.issued 2014-05-07
dc.identifier.uri http://hdl.handle.net/10214/8092
dc.description.abstract The purpose of this research was to determine the nitrogen fertility benefits of anaerobic digestates (AD) applied to agricultural soils for crop production. The kinetics of nitrogen release in soils amended with AD were measured in 6-week laboratory incubation studies. Nitrification occurred within the first 3-4 weeks. Mineralization was not statistically significant over time. Soil samples from field trials in the 2012 - 2013 cropping year showed nitrification and mineralization occurred in the six weeks after AD application. Most soil inorganic-N was taken up by the crop before harvest. Early growth of maize (Zea mays L.) in soil amended with AD was investigated in a greenhouse trial. Field trials in 2012 and 2013 measured grain yield response and stover production of maize in soils treated with AD, urea, or manure (2013 only). These experiments confirm that inorganic-N in digestate and urea is equally available, and that ADs are a comparable nitrogen source to liquid manure (FNEs of 34% and 31%, respectively). en_US
dc.description.sponsorship Ontario Ministry of Agriculture and Food and Ministry of Rural Affairs - University of Guelph Partnership (Research Program and Highly Qualified Personnel Scholarship Program) en_US
dc.language.iso en en_US
dc.subject anaerobic digester en_US
dc.subject digestate en_US
dc.subject nitrogen en_US
dc.subject nutrient management en_US
dc.subject maize en_US
dc.subject corn en_US
dc.subject Zea mays en_US
dc.subject soil en_US
dc.subject incubation en_US
dc.subject anaerobic digester en_US
dc.subject digestate en_US
dc.subject nitrogen en_US
dc.subject nutrient management en_US
dc.subject maize en_US
dc.subject corn en_US
dc.subject Zea mays en_US
dc.subject soil en_US
dc.subject incubation en_US
dc.title Characterization of Anaerobic Digestates for their Nitrogen Fertility Value and Improved Nutrient Management en_US
dc.type Thesis en_US
dc.degree.programme Environmental Sciences en_US
dc.degree.name Master of Science en_US
dc.degree.department School of Environmental Sciences en_US


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