A comparison of the carbon dioxide fluxes of two annual cropping systems and a perennial hay field in southern Manitoba over 30 months

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dc.contributor.authorTaylor, Amanda M.
dc.contributor.examiningcommitteeTenuta, Mario (Soil Science) Entz, Martin (Plant Science)en_US
dc.contributor.supervisorAmiro, Brian (Soil Science)en_US
dc.date.accessioned2013-01-08T19:49:58Z
dc.date.available2013-01-08T19:49:58Z
dc.date.issued2013-01-08
dc.degree.disciplineSoil Scienceen_US
dc.degree.levelMaster of Science (M.Sc.)en_US
dc.description.abstractThe eddy-covariance method was used to measure net ecosystem productivity over three adjacent fields from 2009 to 2011: two annual cropping systems (oat-canola-oat and hay-oat-fallow) recently converted from perennial cropping, and a perennial hay/pasture. We compared the management practises, determined the net carbon budget, and examined the effects of inter-annual variability. Carbon accumulation began earlier in the spring and continued later in the fall at the perennial site, compared with the annual crop sites, due to a longer growing season and continual plant cover. Cumulative cropping season net ecosystem productivity at the perennial site ranged from 40 to 240 g C m^(-2) because of variable weather. Including harvest removals and manure additions, the perennial site gained 120 g carbon m^(-2) and the annual sites lost 240 and 415 g carbon m^(-2), respectively, over the 30-month period. This indicates that the annual cropping systems would decrease soil carbon at this location.en_US
dc.description.noteFebruary 2013en_US
dc.identifier.urihttp://hdl.handle.net/1993/14427
dc.language.isoengen_US
dc.rightsopen accessen_US
dc.subjecteddy covarianceen_US
dc.subjectcarbon dioxideen_US
dc.subjectcarbon budgeten_US
dc.subjectnet ecosystem productivityen_US
dc.subjectagromicrometeorologyen_US
dc.subjectcarbonen_US
dc.subjectmicrometeorologyen_US
dc.subjectagroecologyen_US
dc.subjectCO2en_US
dc.subjectinter-annual variabilityen_US
dc.subjectagroecosystemen_US
dc.titleA comparison of the carbon dioxide fluxes of two annual cropping systems and a perennial hay field in southern Manitoba over 30 monthsen_US
dc.typemaster thesisen_US
local.subject.manitobayesen_US
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