Microbial carbon use efficiency (CUE) is a key parameter for soil organic carbon (SOC) cycling. However, there is still lack of evidence for linkages between shifts in SOC stocks and altered microbial CUE under fertilization. Here, we conducted a meta-analysis to explore the effects of fertilization on microbial CUE and its relationships with SOC sequestration. We found that inorganic and combined inorganic-organic fertilization increased microbial CUE by 6.8% and 9.7%, respectively. These two types of fertilizer also increased SOC contents by 4.1% and 51.7%, respectively. Inorganic and combined inorganic-organic fertilization-induced increase in SOC content was positively associated with increased microbial CUE. Our result provided overwhelming evidence that the increase of microbial CUE induced by inorganic and combined inorganic-organic fertilization exerts important effect on SOC sequestration.

微生物碳利用效率 (CUE) 是土壤有机碳 (SOC) 循环的关键参数。然而，仍然缺乏证据表明 SOC 库存的变化与受精下微生物 CUE 的改变之间存在联系。在这里，我们进行了一项荟萃分析，以探讨施肥对微生物 CUE 的影响及其与 SOC 固存的关系。我们发现无机和无机-有机联合施肥分别使微生物 CUE 增加了 6.8% 和 9.7%。这两种肥料也分别增加了 4.1% 和 51.7% 的 SOC 含量。无机和无机-有机联合施肥诱导的 SOC 含量增加与微生物 CUE 增加呈正相关。