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Effect of sampling strategies and nitrogen fertilization best management practices on cumulative nitrous oxide emissions

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dc.contributor.advisor Wagner-Riddle, Claudia Ferrari Machado, Pedro Vitor 2017-05-29T16:09:00Z 2017-05-29T16:09:00Z 2017-05 2017-05-23 2017-05-29
dc.description.abstract This thesis consists of firstly, an assessment of diurnal variation (DV) and effect of sampling frequency on N2O cumulative emissions, and secondly, an evaluation of N2O emissions in response to N fertilization best management practices (BMPs) in a corn field. The first study was performed by sub-sampling a high frequency dataset for growing and non-growing seasons. For growing seasons, taking mid-morning samples twice per week after N fertilization, with an extra sample taken after >10 mm rainfall resulted in lowest uncertainties among the studied strategies. For non-growing seasons mid-morning and mid-afternoon measurements introduced positive errors into the analysis, but taking bi-weekly mid-morning samples still underestimated fluxes due to missing N2O emission events. For the second study, the interaction of soil water content and soil nitrate influenced N2O emissions and the tested BMPs were effective to mitigate N2O emissions when nitrate accumulation was delayed to periods when soil was drier. en_US
dc.description.sponsorship Fertilizer Canada and Agriculture and Agri-Food Canada provided funding for the project. Koch fertilizers provided N sources for our research. Thurtell, Latornell and Sharom families, and the estate of the late Martha Robb provided scholarships and travel grants during my M.Sc. program. en_US
dc.language.iso en en_US
dc.subject climate change en_US
dc.subject DCD en_US
dc.subject enhanced efficiency fertilizers en_US
dc.subject flux gradient method en_US
dc.subject GHG en_US
dc.subject NBPT en_US
dc.subject side-dress fertilization en_US
dc.subject slow release fertilizer en_US
dc.subject spring fertilization en_US
dc.subject 4Rs en_US
dc.title Effect of sampling strategies and nitrogen fertilization best management practices on cumulative nitrous oxide emissions en_US
dc.type Thesis en_US Environmental Sciences en_US Master of Science en_US School of Environmental Sciences en_US
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