15N Natural Abundance Characteristics of Ammonia Volatilization from Soils Applied by Different Types of Fertilizer

Ammonia (NH3) volatilized from cropland significantly impacts the ecological environment and human health. The identification quantification of atmospheric sources NH3 are therefore important for emission reduction air pollution control. Choosing appropriate nitrogen (N) fertilizer types is one key ways to reduce emissions agricultural systems due different N fertilizers with factors. natural abundance isotope (δ15N) values can well identify source volatilization, although there rare research on δ15N-NH3 when applying fertilizers. Here, we conducted an incubation experiment study characteristics during whole volatilization process after were applied soil. results show that cumulative urea (U), urease inhibitor (UI), compound (CF) ammonium nitrate phosphate (AP) treatment was 5.25 ± 0.00, 3.11 3.22 0.19 1.38 0.12 kg ha−1 at end 15-day period, respectively. average δ15N value U, UI, CF AP treatments −36.02 4.95, −29.08 9.70, −35.18 4.98 −29.42 4.33‰, Generally, ranged −41.33 −6.30‰ process. lower in U than UI (p < 0.05), which suggests forms slow-release additions fertilizers, such as NO3−-N inhibitors, delay or slow down resulting relative isotopic enrichment. Therefore, basic properties changes soil NH4+-N impacted values.