02296naa a2200277 a 450000100080000000500110000800800410001902400570006010000130011724501170013026000090024750001200025652013170037665000130169365000250170665000220173165000290175365000170178265300270179965300230182665300090184965300300185870000200188870000200190877300900192820700222022-03-30       2017    bl uuuu     u00u1 u    #d7 ahttps://doi.org/10.1590/S0100-204X20170003000072DOI1 aRECH, I.  aAdditives incorporated into urea to reduce nitrogen losses after application to the soil.h[electronic resource]  c2017  aTítulo em português: Aditivos incorporados à ureia para reduzir perdas de nitrogênio após aplicação ao solo.  aThe objective of this work was to develop urea-based fertilizers with internal incorporation of urease inhibitors and other additives in the granule. The effects of the incorporation of NBPT, copper (Cu+2), boric acid (H3BO3), elemental sulphur (Sº), and a clay mineral from the zeolite group in powder urea - with ten different combinations of these additives - were evaluated as to N losses by volatilization and leaching. The losses in laboratory-developed formulations were compared with those of commercial fertilizers coated with the same additives (Super N, FH Nitro Mais, and FH Nitro Gold). The evaluations were made in greenhouse conditions, using a Ultisol accommodated in PVC columns. Nitrate and ammonium leaching was evaluated in the solution percolated through the soil columns. Ammonia volatilization was measured with a semi-open static chamber. The incorporation of urease inhibitors (NBPT, H3BO3, and Cu+2) into the urea granules was efficient to reduce N volatilization. Ammonia volatilization in the laboratory-developed ureas was lower than in commercial fertilizers coated with the same additives, while ammonium sulfate losses by leaching were similar. The addition of zeolite does not reduce N volatilization. Mineral N leaching in the soil profile is not affected by urease inhibitors.  aLeaching  aNitrogen fertilizers  aUrease inhibitors  aFertilizante nitrogenado  aLixiviação  aAmmonia volatilization  aInibidor de urease  aNBPT  aVolatilizaçãode amônia1 aPOLIDORO, J. C.1 aPAVINATO, P. S.  tPesquisa Agropecuária Brasileira, Brasília, DFgv. 52, n. 3, p. 194-204, mar. 2017.