Feng Sijie, Wang Mengru, Heal Mathew R, Liu Xuejun, Liu Xueyan, Zhao Yuanhong, Strokal Maryna, Kroeze Carolien, Zhang Fusuo, Xu Wen
State Key Laboratory of Nutrient Use and Management, College of Resources and Environmental Sciences, Key Laboratory of Plant-Soil Interactions, Ministry of Education, National Observation and Research Station of Agriculture Green Development (Quzhou, Hebei), China Agricultural University, Beijing 100193, China.
Earth Systems and Global Change Group, Wageningen University & Research, Wageningen 6708 PB, Netherlands.
Sci Adv. 2024 Sep 13;10(37):eadp2558. doi: 10.1126/sciadv.adp2558. Epub 2024 Sep 11.
Excessive nitrogen (N) deposition affects aquatic ecosystems worldwide, but effectiveness of emissions controls and their impact on water pollution remains uncertain. In this modeling study, we assess historical and future N deposition trends in Chinese river basins and their contributions to water pollution via direct and indirect N deposition (the latter referring to transport of N to water from N deposited on land). The control of acid gas emissions (i.e., nitrogen oxides and sulfur dioxide) has had limited effectiveness in reducing total N deposition, with notable contributions from agricultural reduced N deposition. Despite increasing controls on acid gas emissions between 2011 and 2019, N inputs to rivers increased by 3%, primarily through indirect deposition. Simultaneously controlling acid gas and ammonia emissions could reduce N deposition and water inputs by 56 and 47%, respectively, by 2050 compared to 2019. Our findings underscore the importance of agricultural ammonia mitigation in protecting water bodies.
过量的氮（N）沉降影响着全球的水生生态系统，但排放控制的有效性及其对水污染的影响仍不确定。在这项建模研究中，我们评估了中国流域历史和未来的氮沉降趋势，以及它们通过直接和间接氮沉降（后者指从陆地沉积的氮向水体的传输）对水污染的贡献。酸性气体排放（即氮氧化物和二氧化硫）的控制在减少总氮沉降方面效果有限，农业减少的氮沉降贡献显著。尽管在2011年至2019年间对酸性气体排放的控制不断加强，但河流的氮输入量仍增加了3%，主要是通过间接沉降。与2019年相比，到2050年同时控制酸性气体和氨排放可分别减少56%和47%的氮沉降和水体输入。我们的研究结果强调了农业氨减排在保护水体方面的重要性。
