101157 The Effect of Green Waste Compost on Nitrous Oxide Production Under Different Temperatures.
Poster Number 177-502
See more from this Division: SSSA Division: Soil Biology and Biochemistry
See more from this Session: Soil Biology and Biochemistry Poster I (includes student competition)
Monday, November 7, 2016
Phoenix Convention Center North, Exhibit Hall CDE
Abstract:
Agricultural soil is a major source of the increased N2O in atmosphere, accounting for 60% of the global annual emission. Green waste compost as soil organic amendments affect N2O emissions by either providing N substrate through compost mineralization or decreasing N availability through immobilization. We conducted a 15 days’ laboratory experiment to investigate the effect of compost application on N2O production under different temperatures. In the soils treated with 50 or 100 mg N kg-1fertilizer, the application of compost increased the total N2O emissions by 89 or 97% under high temperature (35°C), by 207 or 69% under room temperature (25°C), and by 99 or 229% under low temperature (15°C) compared to no compost treatments, respectively. The application of compost didn’t significantly affect soil inorganic N content in all the N and temperature treatments. The net nitrification rates were promoted by the compost application by an average of 26, 12 and 35% at 15, 25 and 35°C, respectively. Results indicate that temperature is an important factor determining the effect of compost application on N2O production processes.
See more from this Division: SSSA Division: Soil Biology and Biochemistry
See more from this Session: Soil Biology and Biochemistry Poster I (includes student competition)