氨
氮气
活性氮
沉积(地质)
农业
环境科学
环境化学
生态系统
营养污染
氮气循环
环境污染
污染
自然资源经济学
环境保护
化学
生态学
生物
经济
古生物学
有机化学
沉积物
作者
Lei Liu,Wen Xu,Xiankai Lu,Buqing Zhong,Yixin Guo,Xiao Lu,Yuanhong Zhao,Wei He,Songhan Wang,Xiuying Zhang,Xuejun Liu,Peter M. Vitousek
标识
DOI:10.1073/pnas.2121998119
摘要
Significance Agricultural systems are already major forces of ammonia pollution and environmental degradation. How agricultural ammonia emissions affect the spatio-temporal patterns of nitrogen deposition and where to target future mitigation efforts, remains poorly understood. We develop a substantially complete and coherent agricultural ammonia emissions dataset in nearly recent four decades, and evaluate the relative role of reduced nitrogen in total nitrogen deposition in a spatially explicit way. Global reduced nitrogen deposition has grown rapidly, and will occupy a greater dominant position in total nitrogen deposition without future ammonia regulations. Recognition of agricultural ammonia emissions on nitrogen deposition is critical to formulate effective policies to address ammonia related environmental challenges and protect ecosystems from excessive nitrogen inputs.
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