As natural and managed terrestrial ecosystems are major sources of the potent greenhouse gas nitrous oxide (N₂O) and of the atmospheric pollutant nitric oxide (NO), predicting the source strengths of these ecosystems is central to understanding and sustainably managing the N-oxides fluxes. Here we reviewed 82 high temporal resolution datasets on N₂O and 57 on NO fluxes collected from multi-site and multi-year field measurements, including grasslands, forests, and agricultural crops, to assess whether soil N intensity, that is, the time-weighted sum of soil NH₄⁺ and/or NO₃⁻ concentrations, can be used to estimate annual N-oxides emissions. We show that soil N intensity alone can accurately predict annual N₂O and NO emissions, and that the N₂O emission strength is exponentially related to the soil inorganic N load. Thus, measuring soil inorganic N loads should improve current estimates of N-oxide emissions from global terrestrial ecosystems, and open possibilities for monitoring N₂O mitigation efforts.

由于自然和受控的陆地生态系统是强大的温室气体一氧化二氮（N ₂ O）和大气污染物一氧化氮（NO）的主要来源，因此预测这些生态系统的来源强度对于理解和可持续管理N-氧化物至关重要通量。在这里，我们回顾了82个关于N ₂ O的高时间分辨率数据集和57个关于NO通量的数据集，这些数据来自多站点和多年的田间测量，包括草地，森林和农作物，以评估土壤N强度（即时间）土壤的加权总和NH ₄ ⁺和/或NO ₃ ^-的浓度，可以用于估计每年N-氧化物的排放。我们表明仅土壤氮强度就能准确预测年氮₂ O和NO的排放，以及N ₂ O的排放强度与土壤无机氮负荷呈指数关系。因此，测量土壤无机氮负荷将改善目前对全球陆地生态系统氮氧化物排放量的估计，并为监测N ₂ O缓解工作提供可能性。