01574naa a2200133 a 450000100080000000500110000800800410001910000110006024501230007126000090019452010440020365300360124777301570128310772272011-06-06       2010    bl uuuu     u00u1 u    #d1 aEpagri  aLeaching of nitrate to the fertilization with litter of swine bed depping liquid swine manure and chemical fertilizer.  c2010  aThe successive application of high doses of pig manure can lead to contamination of nitrate, due to the high nitrogen concentrations in these wastes, related primarily to the composition of the diet of pigs. This study evaluated changes in levels of N-NO3- in an Ultisol, typical in the city of Bra??o do Norte, SC, during the cycle of culture of the maize in a tillage system, in function to the fertilization with litter of swine bed depping, liquid swine manure and chemical fertilizer, with application of the appropriate dosage of N and twice the recommended dosage for the maize. The evaluations were made at depths of 0-15, 15-30, 30-45 and 45-60 cm at six dates during the maize cycle. There were increases in the levels of NO3- in the soil, with variation of values during the cycle of the culture. The highest value was observed in the treatment fertilized with pig slurry 2x in the depth of 45-60 cm. The results indicate the occurrence of leaching of NO3-, but these elements are not yet present at critical levels in the soil.  aSwine percolation fertilization  tIn: WORLD CONGRESS OF SOIL SCIENCE, 19., 2010, Brisbane, Austr??lia. [Proceedings...]. Brisbane, Austr??lia: International Union of Soil Sciences, 2010.