01907naa a2200265 a 450000100080000000500110000800800410001902200140006010000200007424501480009426000090024252011130025165000140136465000290137865000110140765300210141870000210143970000190146070000190147970000230149870000140152170000220153570000210155777300630157821523912023-03-15       2023    bl uuuu     u00u1 u    #d  a0301-47971 aNUNES, R. S. G.  aMitigation of ammonia and greenhouse gases emissions from urea coated with oil shale residues in a silvopastoral system.h[electronic resource]  c2023  aThe objective of this work was to investigate the viability of using retorted oil shale as urea coating (U + ROS) in the decrease of N losses by ammonia (NH3?N) volatilization. The experiment was carried out in a silvopastoral system with a randomized block design with split-plots. The main treatments consisted of spatial arrangements of the trees, while the subdivision of the plots constituted the surface application of common urea (U) and retorted oil shale-coated urea (U + ROS) for the pasture. In addition to NH3 measurements, fluxes of N2O and CH4 in the soil were determined, as well as soil moisture and contents of mineral N (0?5 cm). Independently of tree spacing, the use of ROS along with urea (U + ROS) showed a mean decrease of 15.9% in the accumulated NH3 volatilization and 24.1% in the peaks of emission, although it was not significantly different from the U treatment (P &lt0.10). In addition, it did not increase significantly the N2O and CH4 emissions, evidencing a potential to decrease N losses by ammonia volatilization, with no impact on greenhouse gases emissions from the soil.  aOil shale  aFertilizante Nitrogenado  aMetano  aXisto betuminoso1 aDELOSS, A. DE M.1 aMARTINAZZO, R.1 aBAMBERG, A. L.1 aSILVEIRA, C. A. P.1 aBAYER, C.1 aSANTOS, D. C. DOS1 aVIEIRA, F. C. B.  tJournal of Environmental Managementgv. 326, 116779, 2023.