Nitrous oxide (N₂O) and carbon dioxide (CO₂) emitted from forest soil are main greenhouse gases (GHGs). The nutrients released during litter decomposition and phosphorus (P) addition in forest soil may directly affect soil GHGs emissions. Cinnamomum camphora plantations are generally cultivated for leaf-harvesting for industrial purpose. Since C. camphora plantations are generally distributed in P-limited area, interactions between leaf-harvesting and P application may impact soil GHG emissions, which however, has rarely been studied. We conducted an in situ study to examine the effects of leaf-harvesting and P addition on soil N₂O and CO₂ emissions over 14 months using full-factorial complete-randomized design. Litter removal was performed by removing all litter above the soil surface and P was added as nutrient solution. The results showed that N₂O emission rates mainly depended on litter removal and its interaction with P treatment. Specifically, litter removal enhanced N₂O emissions by 108%, while P addition reduced this enhancement by 39.7%. However, while P addition increased soil CO₂ emission rates by 6.7%, neither litter removal nor its interaction with P addition influenced soil CO₂ emissions. The results suggested that leaf-harvesting practice potentially enhanced N₂O emissions from C. camphora plantation soil, while P management mitigated the enhancement. This study has implications for the management of leaf-harvesting C. camphora plantations concerning soil nutrient conservation and mitigation of forest soil GHG emissions, especially in forestry or agricultural soils in subtropical regions experiencing intensive leaf-harvesting management and fertilization practice.

森林土壤排放的一氧化二氮（N ₂ O）和二氧化碳（CO ₂）是主要的温室气体（GHG）。森林土壤凋落物分解和磷（P）添加过程中释放的养分可能直接影响土壤温室气体的排放。肉桂樟树人工种植通常用于工业目的的叶片收获。由于樟脑樟人工林通常分布在磷限制的区域，因此，叶片采伐和磷肥之间的相互作用可能会影响土壤温室气体的排放，然而，很少对此进行研究。我们进行了一项原位研究，以研究采叶和添加磷对土壤N ₂ O和CO _2的影响采用全因子完全随机化设计，可在14个月内实现排放。通过去除土壤表层上方的所有垃圾来去除垃圾，并添加P作为营养液。结果表明，N ₂ O的排放速率主要取决于凋落物的去除及其与磷处理的相互作用。具体而言，清除垃圾可将N ₂ O排放提高108％，而添加P则可将这种增长降低39.7％。然而，尽管添加P使土壤CO ₂排放速率增加了6.7％，但清除凋落物或与添加P的相互作用都不会影响土壤CO ₂排放。结果表明，叶片采摘实践可能会增加樟脑樟脑中N ₂ O的排放量人工林土壤，而磷管理减轻了这种增强作用。这项研究对于叶片养分樟脑人工林的管理具有重要意义，涉及土壤养分的养护和森林土壤温室气体排放的缓解，特别是在经历了密集的叶片收获管理和施肥实践的亚热带地区的林业或农业土壤中。