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dc.contributor.supervisor Amiro, Brian (Soil Science) en_US
dc.contributor.author Fraser, Trevor James
dc.date.accessioned 2012-08-20T16:36:51Z
dc.date.available 2012-08-20T16:36:51Z
dc.date.issued 2012-08-20
dc.identifier.uri http://hdl.handle.net/1993/8441
dc.description.abstract Sequestering atmospheric carbon in soil is an attractive option for mitigation of rising atmospheric carbon dioxide concentrations through agriculture. Perennial crops are more likely to gain carbon while annual crops are more likely to lose carbon. A pair of eddy covariance towers were set up near Winnipeg Manitoba, Canada to measure carbon flux over adjacent fertilized long-term perennial grass hay fields with high soil organic carbon. In 2009 the forage stand of one field (Treatment) was sprayed with herbicide, cut and bailed; following which cattle manure was applied and the land was tilled. The forage stand in the other field (Control) continued to be cut and bailed. Differences between net ecosystem productivity of the fields were mainly due to gross primary productivity; ecosystem respiration was similar for both fields. When biomass removals and manure applications are included in the carbon balance, the Treatment conversion lost 149 g C m^(-2) and whereas the Control sequestered 96 g C m^(-2), for a net loss of 245 g C m^(-2) over the June to December period (210 days). This suggests that perennial grass converted for annual cropping can lose more carbon than perennial grasses can sequester in a season. en_US
dc.rights info:eu-repo/semantics/openAccess
dc.subject Carbon en_US
dc.subject Dioxide en_US
dc.subject Forage en_US
dc.subject Pasture en_US
dc.subject Soil en_US
dc.subject CO2 en_US
dc.subject Eddy en_US
dc.subject Covariance en_US
dc.subject Flux en_US
dc.title Carbon dynamics of perennial grassland conversion for annual cropping en_US
dc.type info:eu-repo/semantics/masterThesis
dc.type master thesis en_US
dc.degree.discipline Agribusiness and Agricultural Economics en_US
dc.contributor.examiningcommittee Tenuta, Mario (Soil Science) Wittenberg, Karin (Animal Science) en_US
dc.degree.level Master of Science (M.Sc.) en_US
dc.description.note October 2012 en_US


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