Tuesday, 7 October 2008

George R. Brown Convention Center, Exhibit Hall E

Harold Collins, USDA-ARS-NPA-SPNRU, IAREC, 24106 N. Bunn Rd., Prosser, WA 99350-9687, Jason Streubel, Crops and Soil Science, Washington State University - IAREC Prosser, 1204 West 3rd Street, Grandview, WA 98930, Stephen Fransen, Washington State University, Washington State Univ.-IAREC, 24106 N Bunn Rd., Prosser, WA 99350-9687, Chad Kruger, Center for Sustaining Agriculture & Natural Resources, Washington State University, 1100 N. Western Ave., Wenatchee, WA 98801 and Shulin Chen, Biological Systems Eng. Department, Washington State University, Pullman, WA 99164-6120

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.

See more of: GRACEnet (Posters)
See more of: S06 Soil & Water Management & Conservation

2008 Joint Annual Meeting (5-9 Oct. 2008): GRACEnet: Trace Gas Fluxes from Irrigated Soils Amended with Anaerobic Digested Dairy Manure.

682-10 GRACEnet: Trace Gas Fluxes from Irrigated Soils Amended with Anaerobic Digested Dairy Manure.