College of Earth and Environmental Sciences, Lanzhou University, Lanzhou 730000, China.
College of Earth and Environmental Sciences, Lanzhou University, Lanzhou 730000, China.
Sci Total Environ. 2022 Mar 15;812:151450. doi: 10.1016/j.scitotenv.2021.151450. Epub 2021 Nov 4.
Ammonia (NH) emissions mostly from agriculture result in air pollution and degrade human health. However, a full picture of soil NH emissions and associated abatement in cropping systems are not well understood. Here we present a thorough analysis of cropland NH emissions, discuss mitigation potential and assess associated abatement costs. Global cropland NH emissions account for 26% of total soil nitrogen losses, and are estimated as 22.8-31.2 Tg N yr during 1996-2013 with the increase rate of 1.6% yr. Our results also show that, with no increase in nitrogen fertilizer, climate change can contribute to an additional 10% increase in cropland NH emissions in 2100 compared to the 2010 baseline. Instead, our scenario analysis show, cropland NH emissions will decline by 26% from 2010 to 2100 given a 0.5% yr decrease in N fertilizer (with current technology and agricultural management level), considering the facts stronger control policies are expected to occur worldwide including Western Europe, the United States of America and China. The most ambitious management (with all known mitigation practices) can reduce cropland NH emissions by up (71%, 17.6 Tg N yr) at an abatement cost of US$524 billion. Our findings indicate that cropland NH emissions can be mitigated through adoption of appropriate human management practices with considerable economic costs, providing a critical reference for the future NH abatement strategies.
氨（NH）排放主要来自农业，导致空气污染，危害人类健康。然而，人们对种植系统中的土壤 NH 排放及其减排措施还没有全面的了解。在这里，我们对农田 NH 排放进行了全面分析，讨论了减排潜力，并评估了相关的减排成本。全球农田 NH 排放占土壤氮素总损失的 26%，1996-2013 年估计为 22.8-31.2TgNyr，年增长率为 1.6%。我们的研究结果还表明，在不增加氮肥的情况下，与 2010 年基准相比，气候变化可能导致 2100 年农田 NH 排放额外增加 10%。相反，我们的情景分析表明，如果氮化肥以 0.5%yr 的速度减少（基于当前技术和农业管理水平），那么从 2010 年到 2100 年，农田 NH 排放将减少 26%。考虑到包括西欧、美国和中国在内的世界范围内预计会实施更强有力的控制政策这一事实，这是最具雄心的管理（采用所有已知的减排措施），可以减少农田 NH 排放（71%，17.6TgNyr），减排成本为 5240 亿美元。我们的研究结果表明，通过采用适当的人类管理实践，可以减轻农田 NH 排放，但需要付出相当大的经济成本，为未来的 NH 减排战略提供了重要参考。
