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| Titel |
Effect of land use change for bioenergy on greenhouse gas emissions from a wet marginal soil in New York State, USA. |
| VerfasserIn |
Cathelijne Stoof, Cedric Mason, Tammo Steenhuis, Brian Richards |
| Konferenz |
EGU General Assembly 2013
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 15 (2013) |
| Datensatznummer |
250077093
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| Zusammenfassung |
| Millions of hectares of marginal lands in the Northeast USA no longer used for
agriculture are suitable for production of second-generation cellulosic bioenergy crops,
offering the potential for regional bioenergy production without inducing food vs. fuel
competition for prime farmland. Abundant water resources, close proximity between
production and markets, and compatibility with existing agricultural systems all favor
development in the region. Yet, little is known about how sustainable bioenergy
crop production on marginal lands is regarding greenhouse gas emissions. In a
10-ha field trial on wet marginal soils in upstate New York, we are assessing the
effect of land use change (from fallow land to perennial grass stands) on N2O and
CH4 emissions. The deep clay loam is unsuited for row-crop agriculture because it
is too dry in summer and too wet in winter. Monthly chamber campaigns were
performed from April to November 2012 to monitor large scale (10-20 m resolution)
differences caused by land cover type (n=4 for both switchgrass, reed-canary grass and a
50-yr unplowed control) across soil moisture gradients (n=5 soil moisture levels per
replicate). Additional weekly campaigns assessed the smaller scale spatial and temporal
variability in emissions at meter-scale. Here we present results of both the large and
small-scale patterns in greenhouse gas emissions from this marginal soil, and discuss
effects of soil properties and hydrologic conditions as potential drivers. Insight
gained about the environmental impact of bioenergy crops can be used to assess the
sustainability of using this region’s underutilized land base for energy production. |
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