中文摘要：

通过田间定位观测分析，研究稻麦轮作农田系统中土壤磷素的迁移流失特征及其对水环境的影响．结果表明，农田磷素以径流流失为主，渗漏流失极微，施肥对磷径流流失影响明显．在较低传统施肥水平下（102kg·hm^-2·a^-1），农田磷年流失量为5．33kg·hm^-2，占施肥量的3．59％．稻季磷素流失对水环境影响小，麦季施肥水平虽低，但施肥期排水磷浓度高，仍对水环境质量构成一定威胁．

英文摘要：

The study was focused on the phosphorus migration in the soil system and the effect of phosphorus loss on the water environment through field experiments. The results showed that the runoff loss was much higher than the leakage loss, and the fertilization of P had a great effect on the loss of P in running water. Under the application rate of 102 kg · hm^-12 · a^-1 , the total P loss was 5.33 kg · hm^- 2, accounting for 3.59% of the total P fertilization annually. The P loss in running water was high in wheat season than in rice season and will threaten the security of water environment.