排灌机械工程学报2016，Vol.34Issue(8)：709-714,736,7.DOI:10.3969/j.issn.1674-8530.15.0284
农田地表径流总磷流失特性
Characteristics of total phosphorus loss into surface runoff from farmland
摘要
Abstract
To characterize phosphorus loss in surface runoff from farmland,simulated rainfall experiments were performed in a test field in Qingpu District of Shanghai.Different methods of fertilization were im-plemented to study the total phosphorus loss at different stages of runoff.The results show that phospho-rus loss was more in the early runoff stage than that in the late runoff stage with stable heavy rainfall, and loss rate of the former is almost three times than that of the latter.However,it takes a much longer time of the late runoff stage,so the mass of phosphorus loss will be large in the late runoff stage,which is approximately 1.5 times than that of the early run off stage.Moreover,the total mass of phosphorus loss has a notable correlation with runoff volume where the correlation coefficient is close to 1 by compu-tation,so runoff volume has a great effect on the mass of phosphorus loss.On the other hand,different applications of fertilizer also affect the bulk of phosphorus loss.The soil phosphorus would be easier to lose if the direction of fertilizer application is parallel to the direction of surface runoff flow,compared to the perpendicular flow.The peak value of total phosphorus concentration in the former condition is al-most 2.5 times than that in the latter condition.The results provide a significant reference for the reduc-tion of phosphorus loss and the corresponding non-point source water pollution.关键词
磷/模拟降雨/施肥/流失量/流失强度Key words
phosphorus/simulated rainfall/fertilization/mass of loss/loss rate分类
农业科技引用本文复制引用
朱昊,童菊秀,夏传安,李佳韵,胡晓农,袁永坤..农田地表径流总磷流失特性[J].排灌机械工程学报,2016,34(8):709-714,736,7.基金项目
国家自然科学基金资助项目（51209187）；中央高校基本科研业务费资助项目（2652015116）；中国地质调查局天津地质调查中心项目 （）
