Nitrous oxide (N₂O) is the contributor to agricultural greenhouse gas emissions with the highest warming global potential. It is widely recognised that traffic and animal-induced compaction can lead to an increased potential for N₂O emissions by decreasing soil oxygen supply. The extent to which the spatial and temporal variability of N₂O emissions can be explained by soil compaction is unclear. This review aims to comprehensively discuss soil compaction effects on N₂O emissions, and to understand how compaction may promote N₂O emission hotspots and hot moments. An impact factor of N₂O emissions due to compaction was calculated for each selected study; compaction effects were evaluated separately for croplands, grasslands and forest lands. Topsoil compaction was found to increase N₂O emissions by 1.3 to 42 times across sites and land uses. Large impact factors were especially reported for cropland and grassland soils when topsoil compaction—induced by field traffic and/or grazing—is combined with nitrogen input from fertiliser or urine. Little is known about the contribution of subsoil compaction to N₂O emissions. Water-filled pore space is the most common water metric used to explain N₂O emission variability, but gas diffusivity is a parameter with higher prediction potential. Microbial community composition may be less critical than the soil environment for N₂O emissions, and there is a need for comprehensive studies on association between environmental drivers and soil compaction. Lack of knowledge about the interacting factors causing N₂O accumulation in compacted soils, at different degrees of compactness and across different spatial scales, limits the identification of high-risk areas and development of efficient mitigation strategies. Soil compaction mitigation strategies that aim to loosen the soil and recover pore system functionality, in combination with other agricultural management practices to regulate N₂O emission, should be evaluated for their effectiveness across different agro-climatic conditions and scales.

一氧化二氮 (N ₂ O) 是农业温室气体排放的贡献者，具有最高的全球变暖潜力。人们普遍认识到，交通和动物引起的压实可通过减少土壤氧气供应而导致 N _{2 O 排放的可能性增加。N 2} O 排放的空间和时间变异性在多大程度上可以用土壤压实来解释尚不清楚。本综述旨在全面讨论土壤压实对 N ₂ O 排放的影响，并了解压实如何促进 N ₂ O 排放热点和热点。_{N 2}的影响因子为每个选定的研究计算了由于压实引起的 O 排放；对农田、草地和林地的压实效应进行了单独评估。发现表土压实会使场地和土地利用的 N ₂ O 排放量增加 1.3 至 42 倍。当田间交通和/或放牧引起的表土压实与肥料或尿液中的氮输入相结合时，农田和草地土壤的影响因素尤其大。_{关于底土压实对 N 2} O 排放的贡献知之甚少。充满水的孔隙空间是用于解释 N _{2的最常见的水量度}O 排放可变性，但气体扩散率是具有较高预测潜力的参数。_{微生物群落组成对 N 2} O 排放的影响可能不如土壤环境那么重要，因此需要对环境驱动因素与土壤压实之间的关联进行全面研究。_{缺乏对导致压实土壤中 N 2} O 在不同压实度和不同空间尺度上积累的相互作用因素的了解，限制了高风险区域的识别和有效缓解策略的制定。旨在松散土壤和恢复孔隙系统功能的土壤板结缓解策略，结合其他农业管理实践来调节 N ₂应评估 O 排放在不同农业气候条件和规模下的有效性。