Abstract: The biomass charcoal from poplar leaves was added to the aeolian sandy soil with simulated fertilization， we studied effects of biomass charcoal from poplar leaves on distribution of nitrogen forms in aeolian sandy soil. The results show that compared with the traditional fertilization mode and soil testing formula fertilization mode, the prepared biomass charcoal can increase the mass ratios of ammonium nitrogen, nitrate nitrogen, available nitrogen and total nitrogen in aeolian sandy soil. The mass ratios of ammonium nitrogen, nitrate nitrogen and total nitrogen are directly proportional to the amount of biomass charcoal added in the growth cycle of maize. When the mass fraction of biomass charcoal addition is 0.2%, it is fully mixed with the soil, the mass ratios of ammonium nitrogen, nitrate nitrogen and total nitrogen are 36.43 mg/kg,35.02 mg/kg,5.76 g/kg, which are the highest in the traditional fertilization mode, when the mass fraction of biomass charcoal addition is 0.5%, the mass ratio of available nitrogen is the highest under the soil testing formula fertilization mode, and the mass ratio is 79.52 mg/kg.

Key words: poplar leaf, biomass charcoal, aeolian sandy soil improvement, distribution of nitrogen form