Abstract: Nitrogen and phosphorus emission from farmland is one of the important sources of agricultural non-point source pollution, and its emission potential may be affected by many environmental factors. Xihuang village, Xinzhou district, Wuhan city, Hubei province was selected as the experimental site, and the boxplot method and the analysis of variance method were used for the study. The results showed that the average nitrogen content of the study site was between 0.974~1.297 g/kg, and the autumn paddy field content was relatively high, while the summer dryland content was relatively low. The average level of soil phosphorus content was between 0.491 g/kg and 0.676 g/kg, among which the content of near-residential areas in summer dry land was relatively high, while that in distant paddy fields in autumn was relatively low. There was a significant difference in nitrogen content between seasons and water and drought, and there was no significant difference between the neighborhoods. There was a significant difference in phosphorus content between seasons, water and drought, and residential areas.

Key words: farmland soil, nitrogen content, phosphorus content, time and space difference, non-point source pollution