1、主要成绩 从源头阐释农业非点源氮磷流失的关键驱动因素,为控制农业非点源营养 盐流失,促进农业生产的可持续提供理论依据。 (1)模型模拟农业生产营养盐收支,从农田尺度→流域尺度分析农业活动 对环境氮磷污染的潜在风险负荷,阐释农业种植结构的对流域营养盐流失的驱动机制。结果证明,农业种植结构变化是导致区域化肥投入增加,成为农业氮污染负荷风险增加的主要驱动力。 (2)同位素阐释氮素的地球化学循环过程机制,揭示农业区水体硝酸盐的主要环境行为,为防控地区硝酸盐污染提供理论参考。利用同位素示踪技术,量化水体氮污染的不同来源贡献份额,结果显示有机氮成为流域水体(地表+地下)硝态氮的主要来源,河流和地下水体中氮氮浓度与流域蔬菜种植显著相关。在有机肥大力推广的今天,合理施用有机肥成为控制水体氮污染的重要控制因 素。 (3)利用水体自我修复,清除水体氮磷,切实解决水潜在体富营养化风险。采用河流自然水体,构建循环体系,培养水生植被,提高水体氮磷去除效率,净化水体,减少水体富营养化的潜在风险。 科研成果(科研论文和专利)： 1)Li Yanqiang, Yan Weijin*, Wang Fang, Lv Shucong, Li Qingqian, Yu Qibiao (2019). —1—Nitrogen pollution and sources in an aquatic system at an agricultural coastal area of Eastern China based on a dual-isotope approach. Environmental science and pollution research. 26, 23807–23823.(SCI) 2)Li Yanqiang, Wang Fang, Yan Weijin*, Lv Shucong, Li Qingqian, Yu Qibiao, Jun Wang (2019). Enhanced nitrogen imbalances in agroecosystems driven by changing cropping systems in a coastal area of eastern China: from field to watershed scale. Environmental Science: Processes & Impacts, 21,1532–1548.(SCI) (3)Li Yanqiang, Yan Weijin*, Wang Fang*, Lv Shucong, Li Qingqian, Yu Qibiao, (2018) Surface Runoff and Dissolved Phosphorus Losses in Response to Cropping System changes in a coastal Bay. SF Journal of Environmental and Earth Science. (4) Shucong Lv . Fang Wang . Weijin Yan . Yuchun Wang .Qibiao Yu . Yanqiang Li ( 2019) DOC fluorescence properties and egradation in the Changjiang River Network, China:implications for estimating in-stream DOC removal. Biogeochemistry. 145:255–273.(SCI) (5)Shucong Lv, Qibiao Yu , Fang Wang, Yuchun Wang, Weijin Yan, and Yanqiang Li (2019). A Synthetic Model to Quantify Dissolved Organic Carbon Transport in the Changjiang River System: Model Structure and Spatiotemporal Patterns. Journal of Advance in Modeling Earth System. 11,3024–3041.(SCI) 发明专利:晏维金,李艳强,王芳,余其彪(2019)。固着藻藻坪系统去除养殖水体中有害污染物 的方法及系统。专利号:ZL 2016 1 0892107. 0.