Abstract Fire disturbance and atmosphere nitrogen (N) deposition could profoundly impact terrestrial ecosystem function. A field manipulative experiment was conducted in a coniferous-broadleaved mixed forest of the subtropical-temperate transition zone in Central China to evaluate the responses of soil respiration to fire and N addition from July 2014 to December 2018. The results showed that fire significantly stimulated soil respiration by 17.5% whereas N addition had no effects across the whole experimental period. The enhancement of soil respiration intensified with year after fire, being neutral during the first two years but statistically significant in the later three years, which could be attributable to interannual variations of the changes in soil temperature and the cover of woody species. By contrast, a global meta-analysis on soil respiration responses to fire in forests revealed no overall changes in soil respiration and the negative effects were observed between one and three years after the fire and in subtropical forests (-36.6%) only. The contrast findings highlight that general patterns revealed by meta-analyses may not be able to predict ecosystem responses to environment change at a specific site.

中文翻译：

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通过将观察结果与荟萃分析相结合，了解火和氮添加对田间研究土壤呼吸的影响

摘要 火灾扰动和大气氮（N）沉降会对陆地生态系统功能产生深远影响。2014 年 7 月至 2018 年 12 月，在华中亚热带-温带过渡带针阔叶混交林进行田间操作试验，评价土壤呼吸对火和 N 添加的响应。结果表明，火显着刺激了土壤呼吸增加 17.5%，而 N 添加在整个实验期间没有影响。火灾后土壤呼吸的增强随年份的增加而加剧，前两年为中性，后三年具有统计学意义，这可能与土壤温度变化和木本物种覆盖的年际变化有关。相比之下，一项关于土壤呼吸对森林火灾反​​应的全球荟萃分析显示土壤呼吸没有整体变化，并且在火灾发生后一到三年内观察到负面影响，仅在亚热带森林 (-36.6%) 中观察到。对比结果强调，荟萃分析揭示的一般模式可能无法预测特定地点的生态系统对环境变化的反应。