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ARS Home » Midwest Area » Ames, Iowa » National Laboratory for Agriculture and The Environment » Soil, Water & Air Resources Research » Research » Publications at this Location » Publication #202721
Title: Emission of the Greenhouse Gas Nitrous Oxide (N2O) from Riparian Forest Buffers, Warm-Season and Cool-Season Grass Filters and Crop Fields

Author
item KIM, DONG-GILL - IA STATE UNIVERSITY
item SCHULTZ, R - IA STATE UNIVERSITY
item ISENHART, T - IA STATE UNIVERSITY
item Parkin, Timothy
item RAICH, J - IA STATE UNIVERSITY
item LOYNACHAN, T - IA STATE UNIVERSITY

Submitted to: ASA-CSSA-SSSA Annual Meeting Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: 11/16/2006
Publication Date: 11/16/2006
Citation: Kim, D., Schultz, R.C., Isenhart, T.M., Parkin, T.B., Raich, J.W., Loynachan, T.E. 2006. Emission of the Greenhouse Gas Nitrous Oxide (N2O) from Riparian Forest Buffers, Warm-Season and Cool-Season Grass Filters and Crop Fields [CD-ROM]. In: ASA-CSSA-SSSA Annual Meeting Abstracts. Nov. 12-16, 2006, Indianapolis, IN.

Interpretive Summary:

Technical Abstract: Denitrification is recognized as the major mechanism for reducing nitrate in riparian buffers coping with non-point source pollution (NPS) of surface water bodies. However, there are still questions about the quantity and products of denitrification that different kinds of riparian buffer vegetation can support We measured denitrification rates, Nitrous Oxide (N2O) emission, N2O in groundwater, N2O/ N2 emission ratios, and soil properties in riparian forest buffers, warm-season and cool-season grass filters, and a crop field all located in the Bear Creek watershed in central Iowa. Preliminary results suggest that differences among crop fields, warm season grass filters, and forested buffers range between 3-8 g m-2 h-1 N2O-N during the winter months in unfrozen soils with bursts up to 83 g m-2 h-1 N2O-N as these soils thaw after being frozen. These data further suggest as high as 10-fold differences in emissions in the unfrozen soils and 80-fold differences immediately following thawing between the various kinds of buffer plant communities. In this presentation, we will discuss results of annual N2O emission and denitrification rates from riparian forest buffers, warm-season and cool-season grass filters, and crop fields.