报告时间：11月18日 14:00-15:00
报告地点：线下（天津大学地科院221报告厅）+ 线上（腾讯会议：832-395-346）结合
摘要：Significantly reducing greenhouse gas (GHG) emissions from agricultural production is crucial to limiting climate change. Fertilized soils are a major source of nitrous oxide (N2O), a potent GHG. Reducing N2O emissions is a key interest for many countries, including Denmark, where approximately 90% of N2O emissions originate from agricultural soils. Although the link between nitrogen (N) fertilization and N2O emissions is well-known, quantitative evidence for the efficiency of mitigation options in the relevant local context is scarce. This is often due to high flux variation over time scales ranging from hours to a few days. Previous studies have mostly neglected to perform measurements that could to account for this variation. Furthermore, reducing N2O fluxes can result in increased losses through ammonia (NH3) volatilization and N leaching, as well as reduced yields. Thus, establishing tangible mitigation strategies requires a holistic understanding of N2O fluxes in the context of the annual, field-scale N balance, translation of findings into modeling approaches, use of models to identify emission hotspots, and scaling interventions from the field to regional and national levels. Here, we introduce the SmartField initiative, which aims to reduce national N2O emissions in Denmark by 20%–30% by 2030 by testing and providing verified, field-tested mitigation options.
主讲嘉宾：Dr. Klaus Butterbach-Bahl
嘉宾介绍：Dr. Klaus Butterbach-Bahl，德国生物地球化学家、丹麦奥胡斯大学（Aarhus University）可持续农业未来趋势景观研究先驱中心主任，长期从事陆地生态系统如何响应全球变化研究，特别是在理解和管理温室气体(如氧化亚氮、甲烷和二氧化碳)通量以及全球氮循环方面的开创性工作，极大地增进了我们对自然和人为管理生态系统(如森林、草原、农田)中温室气体通量的理解和量化。2024年被授予诺贝尔可持续发展奖(Nobel Sustainability Trust Award)，以表彰他在生态系统生态学和生物地球化学领域的卓越贡献。
