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选择上海宝山罗店镇具有代表性的旱地蔬菜农田生态系统,在从2004年3月到8月的近半年时间里,通过对径流及径流中侵蚀泥沙的氮磷流失情况的连续监测与实验分析,研究了旱地农田施肥与氮磷流失污染之间的关系,探讨了农田氮磷的迁移特征及环境效应,主要结果表明:随地表径流流失的总氮、总磷,流失形态以沉积相为主,大部分是当季施用的化肥,随径流排出农田的氮素中有37.7%是当季施用的氮素化肥,磷素中有26.9%是当季施用的磷素化肥。
Choosing the typical dryland vegetable farmland ecosystem in Luodian, Baoshan, Shanghai, through continuous monitoring and experiment on runoff and runoff erosion of nitrogen and phosphorus from March to August in 2004, The relationship between fertilization of farmland and loss of nitrogen and phosphorus in dry land was analyzed. The characteristics of nitrogen and phosphorus migration and the environmental effect were also discussed. The main results showed that with the loss of total nitrogen and total phosphorus, Most of the main fertilizers used in the season were nitrogen fertilizers, of which 37.7% of the nitrogen discharged from the farmland with runoff was the nitrogen fertilizers applied in the season and 26.9% of the phosphorus used in the season.