Forest regeneration plays an important role in the carbon (C) and nitrogen (N) budget after clear‐cutting. Nonetheless, the effects of regeneration pattern on soil‐atmosphere exchange of greenhouse gases (GHG; CO₂, CH₄ and N₂O) remain poorly understood on the eastern Qinghai‐Tibetan Plateau. This study reports measured field layer GHG fluxes from Picea asperata broadleaved mixed forest (MF, mixed forests with planted P. asperata and natural regeneration of broadleaved species), natural secondary forest (NF, natural without assisted regeneration), and P. asperata plantation forest (PF, artificial planting) to investigate the influence of regeneration patterns on soil GHG fluxes. The soils of the three forest types acted as CO₂ and N₂O sources and CH₄ sinks. The seasonal variation in GHG fluxes was related to soil temperature, rather than soil moisture. Forest types originating from different regeneration processes exhibited different gaseous C fluxes (CO₂ and CH₄), but did not exhibit significant effect on N₂O emissions. NF and MF had higher CO₂ emissions than PF. The difference was related to soil C and N density, NH₄⁺ concentration, and soil β‐glucosidase activity, rather than the soil microbial community. NF had higher CH₄ uptake than the other two forest types, which is possibly related to specific individual phospholipid fatty acids. Overall, forest types differing in regeneration patterns had a significant impact on the C balance from the perspective of soil‐atmosphere exchange of gaseous C at our site. Therefore, the GHG fluxes should be considered when taking measures of forest management and regeneration practices in this region.

中文翻译：

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青藏高原东部典型亚高山森林温室气体的土壤-大气交换：森林更新方式的影响

砍伐后，森林的再生在碳（C）和氮（N）的预算中起着重要作用。尽管如此，在青藏高原东部，人们仍然不清楚再生方式对土壤-大气温室气体（GHG，CO ₂，CH ₄和N ₂ O）交换的影响。这项研究报告了来自云杉云杉阔叶混交林（MF，人工种植的P. asperata和阔叶树种的天然更新的混交林），天然次生林（NF，未经辅助再生的天然林）和实心P. asperata的实地层GHG通量人工林（PF，人工种植）以研究再生方式对土壤温室气体通量的影响。三种森林类型的土壤分别充当CO ₂和N ₂ O源和CH ₄汇。温室气体通量的季节变化与土壤温度有关，而不是土壤湿度。来自不同再生过程的森林类型表现出不同的气态碳通量（CO ₂和CH ₄），但对N ₂ O排放没有显着影响。NF和MF的CO ₂排放量高于PF。差异与土壤碳和氮密度，NH ₄ ^+有关浓度和土壤β-葡萄糖苷酶活性，而不是土壤微生物群落。NF具有比其他两种森林类型更高的CH ₄吸收，这可能与特定的单个磷脂脂肪酸有关。总体而言，从我们场地的土壤-大气中气态碳的交换来看，不同森林类型的再生方式对碳平衡有重要影响。因此，在采取该地区的森林管理和再生措施时，应考虑温室气体排放量。