This research investigated the effect of long-term phosphorus (P) addition relative to carbon (C) availability on nitrous oxide (N₂O) emissions from an ungrazed grassland soil via two incubation experiments. No significant effect of soil P on N₂O was found under C-limited conditions, while under added-C, cumulative N₂O was significantly higher from low-P (p < 0.05) rather than high-P soils. CO₂ was not significantly different between P-levels. This highlights the influence of soil P on N₂O emissions under non C-limiting conditions. This is one of the first studies demonstrating available-C moderating the effect of P on N₂O emissions from temperate grassland soils.

这项研究通过两个孵化实验研究了长期添加磷（P）相对于碳（C）的可用性对未湿润草地土壤中一氧化二氮（N ₂ O）排放的影响。在碳限制条件下，没有发现土壤P对N ₂ O的显着影响，而在添加碳的条件下，低磷土壤（P <0.05）而不是高磷土壤的累积N ₂ O明显更高。P级之间的CO ₂差异不显着。这突显了在非C限制条件下土壤P对N ₂ O排放的影响。这是证明可用的-C调节磷对温带草原土壤N ₂ O排放影响的首批研究之一。