Abstract: Taking the quasi-protected area of Jiangbei water source  area in Jiamusi City， Heilongjiang Province as the research  area, we selected  seven typical land use types  to study the distribution characteristics of nitrogen and phosphorus in groundwater and aeration zone under  different land use types. The results show that the NH⁺₄ content in the irrigated land is significantly lower (p<0.05, same below) than that in other land use types within the depth range of 0—180 cm in the aeration zone. The distribution characteristics of dissolved nitrogen and phosphorus in residential area aeration zone are the most different from those in other land use types. The contents of NO^-₃ (0—150 cm),  NO^-₂ (0—120 cm),  and DP (0—90 cm) in the residential area aeration zone are significantly higher than those in other land use types,  and their contents decrease with the increase of soil depth. For all land use types of groundwater, NO^-₃ is the main component of TN,  and the contents of NO^-₃ and TN in the groundwater of residential areas and irrigated land are significantly higher than those in other land use types.  Agricultural production,  manure and wastewater are the main sources of NO^-₃ in groundwater at residential areas. The results of Pearson correlation analysis show that the content of NO^-₂ in groundwater is significantly   positively correlated with the contents of NH⁺₄,NO^-₂,NO^-₃,  and conductivity  in the soil at 0—30 cm depth. There is a significant   positive correlation between NH⁺₄ content and soil pH  value at 150—180 cm depth. TN  is significantly   positively correlated with NH⁺₄ and NO^-₂ contents in 0—30 cm soil. The research results  provide a theoretical basis for an in-depth understanding of the relationship between the distribution characteristics of  nitrogen and phosphorus in the aeration zone soil and the quality of shallow groundwater under different land use types.

Key words: land use type,  , aeration zone soil,  , groundwater,  , nitrogen,  , phosphorus