Abstract: With leaching-pond and plot experiments in dry farming fields,characteristics, related factors and loads of nitrogen losses via rainfall runoff and leaching from dry farming fields were studied in Shanghai suburbs.The results show that nitrogen losses from wheat fields and vegetable fields were 18.38 kg·hm^-2 and 55.65 kg·hm^-2 respectively, and （NO₃^--N） was the main form of nitrogen leaching losses from dry farming fields.Application of organic manure could reduce nitrogen leaching losses greatly from dry farming fields.

Key words: dry farming field, nitrogen, runoff loss, leaching loss, leaching-pond, organic manure