A process-based understanding of soil carbon (C) sequestration and stabilization has not been precisely characterized due to the lacking of linkage between microbial proliferation and mortality. In this study, stable isotope probing of phospholipid fatty acids and amino sugars were used to determine the microbial responses and microbial residue retention in two soils (Mollisol and Ultisol) with ¹³C-labeled glucose addition. The microbial responses stimulated by glucose were greater in C-poor Ultisol than in C-rich Mollisol. However, the transformation of labile C to microbial residues in Mollisol was more rapid. Therefore, the starvation effect may control microbial growth and microbial residue production, and thus resulting in distinct sequestration and stabilization process of labile C in different soils.

由于缺乏微生物繁殖与死亡率之间的联系，因此无法精确表征对土壤碳（C）螯合和稳定的基于过程的理解。在这项研究中，磷脂脂肪酸和氨基糖的稳定同位素探测被用于确定添加¹³ C标记葡萄糖的两种土壤（Mollisol和Ultisol）中的微生物响应和微生物残留保留。贫C的Ultisol的葡萄糖刺激的微生物反应比富C的Mollisol的大。但是，不稳定的C转化为Mollisol中的微生物残留的速度更快。因此，饥饿效应可以控制微生物的生长和微生物残留的产生，从而导致不同土壤中不稳定碳的螯合和稳定过程。