Nitrous Oxide Emissions in Switchgrass Areas
Abstract:Our goal is to understand how switchgrass yield and nitrous oxide emissions change over changing nitrogen rates.
Objective: To determine the impact of nitrogen rate on nitrous oxide emissions from soils planted in switchgrass and to monitor the controlling environmental factors of nitrous oxide production.
Switchgrass has large potential as a bioenergy crop for the Great Plains:
However this crop needs nitrogen fertilizer to attain maximum yield. When soil moisture is high (after a rainstorm for instance) pore spaces within soil aggregates are saturated creating anaerobic sites for denitrification to occur. Through denitrification soil microbes convert excess nitrogen (N) from the fertilizer to nitrous oxide (N2O), a potent greenhouse gas.
To improve nitrogen efficiency nitrous oxide concentrations and yield rates need to be analyzed to help switchgrass crop management, protect water resources, and minimize greenhouse gases.
Results and Discussion
- McGill University
- Bioresource Engineering U3
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- This material is based upon work supported by National Science Foundation Grant: REU Site: Summer Academy in Sustainable Bioenergy; NSF Award No.: SMA-1359082, awarded to Kansas State University.
- Dr. Charles W. Rice, Kansas State University
- Andrew McGowan, NSF IGERT, Kansas State University
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