College of Earth and Environmental Sciences, Lanzhou University, Lanzhou 730000, China.
Key Laboratory of Plant-Soil Interactions of Ministry of Education (MOE), Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, College of Resources and Environmental Sciences, National Academy of Agriculture Green Development, China Agricultural University, Beijing 100193, China.
Proc Natl Acad Sci U S A. 2022 Apr 5;119(14):e2121998119. doi: 10.1073/pnas.2121998119. Epub 2022 Mar 28.
SignificanceAgricultural 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.
意义农业系统已经是氨污染和环境退化的主要力量。农业氨排放如何影响氮沉积的时空格局，以及未来应在何处采取缓解措施，这些问题仍知之甚少。我们开发了一个近四十年来几乎完整而连贯的农业氨排放数据集，并以空间显式的方式评估了总氮沉积中还原氮的相对作用。全球还原氮沉积增长迅速，如果未来不对氨进行管制，它在总氮沉积中所占的主导地位将会更大。认识到农业氨排放对氮沉积的影响对于制定有效的政策以应对与氨有关的环境挑战和保护生态系统免受过量氮素输入至关重要。
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