A comprehensive evaluation of the impact of forest harvest on soil N₂O flux at the global scale is currently unavailable. In this study, by using a global meta-analysis of 64 observations from 29 peer-reviewed publications over the last 30 years, we elucidated how forest harvest impacted soil N₂O flux and related soil properties. Intensive forest harvest significantly increased soil N₂O flux with a mean effect size of 0.85 and the increase was associated with elevated soil temperature, increased concentration of NO₃⁻-N and decreased soil pH. The effect on soil N₂O flux lasted for around six years, and soil N₂O emission depended on existing forest types in the late stage (the recovery period >6 years) after harvest. Forest harvest clearly increased soil N₂O flux, with effect size ranging 0.73–2.12, in broadleaf forests but did not significantly affect it in coniferous and mixed broadleaf-conifer forests. In addition, the time required for the complete recovery from harvest in terms of N₂O flux was difficult to define because of the scarcity of long-term experiments. Overall, this study provides the first formal global-scale assessment on how forest harvest intensity, forest types and the time since harvest affect soil N₂O flux. The findings of this study help to narrow the knowledge gap regarding the effect of forest harvest on soil N₂O flux, and to facilitate decision making to decrease soil N₂O emission post forest harvest.

目前尚无法对全球范围内森林采伐对土壤 N _{2 O 通量的影响进行综合评估。}在这项研究中，通过对过去 30 年来 29 份同行评审出版物的 64 项观察结果进行全球荟萃分析，我们阐明了森林采伐如何影响土壤 N ₂ O 通量和相关土壤特性。集约化森林采伐显着增加了土壤 N ₂ O 通量，平均效应大小为 0.85，并且增加与土壤温度升高、NO ₃ ^- -N 浓度增加和土壤 pH 值降低有关。对土壤 N ₂ O 通量的影响持续约 6 年，土壤 N ₂O 排放取决于收获后后期（恢复期> 6年）的现有森林类型。在阔叶林中，森林采伐明显增加了土壤 N ₂ O 通量，效应大小范围为 0.73-2.12，但在针叶林和阔叶-针叶混交林中没有显着影响。此外，由于缺乏长期实验，很难确定N _{2 O 通量从收获中完全恢复所需的时间。}总体而言，本研究首次对森林采伐强度、森林类型和采伐时间如何影响土壤 N ₂ O 通量进行了正式的全球规模评估。本研究的结果有助于缩小关于森林采伐对土壤 N _{2影响的知识差距}O 通量，并有助于做出减少森林采伐后土壤 N ₂ O 排放的决策。