A dataset for N natural abundance of soil ammonia volatilization.

Investigating the sources of ammonia (NH) in the atmosphere and the contribution of each source is essential for environmental pollution control. The presented dataset aims to provide N natural abundance (δN) data collected from different controlled treatments to fill the knowledge gap between insufficient data of soil δN-NH and accurately identifying atmospheric NH source apportionments. Our results showed that the overall δN-NH values emitted from soil ranged from -46.09 to 10.22‰, with an average of -26.81 ± 11.17‰. The mean δN-NH values under different nitrogen (N) application rates, N fertilizer types, air temperatures, soil moisture, soil pH, soil types, and land use types were -29.41 ± 10.91, -32.43 ± 6.86, -29.10 ± 10.04, -30.31 ± 6.18, -24.84 ± 13.76, -23.53 ± 7.66, and -14.57 ± 12.54‰, respectively. Significant correlations were observed between δN-NH values and soil pH, soil NO-N concentration, and NH volatilization. This unique database provides basic data and evidence for the qualification of atmospheric NH source apportionments under different study area conditions.