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Title: GRACEnet: Trace Gas Fluxes from Irrigated Soils Amended with Anaerobic Digested Dairy Manure

Author
item Collins, Harold
item STRUEBEL, JASON - WASHINGTON STATE UNIV
item FRANSEN, STEVE - WASHINGTON STATE UNIV
item KRUGER, C - WASHINGTON STATE UNIV
item CHEN, S - WASHINGTON STATE UNIV

Submitted to: American Society of Agronomy Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: 5/25/2008
Publication Date: 9/30/2008
Citation: Collins, H.P., Struebel, J., Fransen, S., Kruger, C., Chen, S. 2008. Gracenet: trace gas fluxes from irrigated soils amended with anaerobic digested dairy manure.. American Society of Agronomy Abstracts, 2008 International Meetings, Houston, TX. Oct 4-9, 2008. On CD.

Interpretive Summary:

Technical Abstract: Dairy production in Eastern Washington has shown a steady increase (4 % per year) over the past eight years, with a farm gate value exceeding 280 million dollars. This increase has also been accompanied by management challenges associated with the production of large concentrations of dairy animal wastes. Challenges include: land use management, soil nutrient imbalances (N, K and P), and insect and odor problems generated from animal manures. In addition, a decline in surface and subsurface water quality has been attributed to the land application of dairy manure as well as a a potential increase in the production trace gases. The effect of N-fertilization, dairy manure and anaerobic digested manure on trace gas emissions within a corn-triticale sillage cropping system was evaluated under irrigation in Eastern Washington. Sillage production with manure amendments is a common practice for dairy management in eastern Washington. Research findings, using indirect N-budget estimates, suggest greater loss of applied N fertilizer either through nitrification-denitrification or/and volatilization in irrigated soils. Trace gas flux was measured an hour after irrigation, using vented chambers, twice a week during the cropping season.