Indiana University-Purdue University Indianapolis (IUPUI) / Nitrous oxide (N2O) is an atmospheric constituent that contributes to climate
warming and stratospheric ozone depletion. A large fraction of the anthropogenic N2O
emission originates from agricultural soils suggesting therefore a strong connection
between N2O accumulation in the atmosphere and agricultural land management. During
the last 2-3 decades, no-till (NT) farming and integration of cover crops into crop rotation
represent two major developments in agriculture, but much remains to be learned about
the impact of these management approaches on N2O emission and underlying biological
soil factors. This dissertation focuses on the contribution of different components of the
soil microflora to N2O production, and how different types of cover crops (legume vs
grass) affect the soil microbial community composition, mineral N availability, and N2O
emission in plowed (PT) and NT soils. To address these questions, several laboratory and
greenhouse experiments were conducted. Results of these experiments documented soil
microbial community responses to cover crop addition and could inform the selection of
cover crops most suitable to soils under different tillage practices.
| Identifer | oai:union.ndltd.org:IUPUI/oai:scholarworks.iupui.edu:1805/11298 |
| Date | 06 May 2016 |
| Creators | Ladan, Shiva |
| Contributors | Jacinthe, Pierre-André, Filippelli, Gabriel, Stott, Diane E., Gilhooly, William P., Moreno, Max Jacobo |
| Source Sets | Indiana University-Purdue University Indianapolis |
| Language | en_US |
| Detected Language | English |
| Type | Dissertation |
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