Nitrous oxide (N₂O) is a powerful greenhouse gas and the main driver of stratospheric ozone depletion. Since soils are the largest source of N₂O, predicting soil response to changes in climate or land use is central to understanding and managing N₂O. Here we find that N₂O flux can be predicted by models incorporating soil nitrate concentration (NO₃^-), water content and temperature using a global field survey of N₂O emissions and potential driving factors across a wide range of organic soils. N₂O emissions increase with NO₃^- and follow a bell-shaped distribution with water content. Combining the two functions explains 72% of N₂O emission from all organic soils. Above 5 mg NO₃^--N kg^-1, either draining wet soils or irrigating well-drained soils increases N₂O emission by orders of magnitude. As soil temperature together with NO₃^- explains 69% of N₂O emission, tropical wetlands should be a priority for N₂O management.

中文翻译：

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温暖排水良好的富氮有机土壤是全球一氧化二氮排放的热点。

一氧化二氮（N ₂ O）是一种强大的温室气体，是平流层臭氧消耗的主要驱动力。由于土壤是N ₂ O的最大来源，因此预测土壤对气候或土地利用变化的响应对于理解和管理N ₂ O至关重要。在这里，我们发现可以通过结合土壤硝酸盐浓度（NO的模型）来预测N ₂ O通量。₃ ^- ），水含量和温度，使用N的全局实地调查₂在大范围的有机土壤的O排放和潜在的影响因子。N ₂ O排放随NO _3的增加^-并遵循带有水含量的钟形分布。结合这两个功能可以解释所有有机土壤中72％的N ₂ O排放。高于5 mg NO ₃ ^-- N kg ^-1时，排干潮湿的土壤或灌溉排水良好的土壤都会使N ₂ O排放量增加几个数量级。作为土壤温度与NO一起₃ ^-解释N中的69％₂ O排放，热带湿地应该是优先级N ₂ O管理。