4 Conclusions
In our study, the diversity and abundance of the soil microbial
community increased continually during vegetation restoration. With
time, vegetation restoration led to a significantly altered soil
microbial community structure. Dissolved organic matter content and
structure are related to standing age, and its changes (degree of
humification, organic matter composition) are key drivers of changes in
microbial community composition, and that organic matter decomposition
in larch forest environments is likely to occur top-down, and that the
interactions between bacterial and fungal relationships increase with
increasing vegetation recovery time. The study provided a deeper
understanding of the vertical movement of dissolved organic matter and
microbial interactions in the process of vegetation restoration.