Nitrogen Fertilizer Inhibitors Impact on Ammonia Volatilization, Nitrate Leaching and Nitrous Oxide Emissions Under Different Soil Types.

Field studies evaluating nitrogen (N) fertilizer inhibitors often focus on a specific N loss pathway due to time, cost and equipment constraints. Nonetheless, the inhibition of one N loss pathway may enhance loss through other pathways. The objective of this study is to assess how nitrification and urease inhibitors concurrently impact ammonia volatilization, nitrate leaching and nitrous oxide emissions from silt loam and sandy loam soils. A laboratory incubation study was set up as a two-way factorial treatment design with different inhibitor types (none, N-Serve, Agrotain Ultra, Limus) and soil types (silt loam, sandy loam) plus a 0 N control. The study is a completely randomized design with four replicates. The study is currently being conducted and further results will be added in the future.