Using natural succession to restore degraded grassland is mainly achieved by self-adjusting the structure and relationship of the internal components of grassland ecosystems. Microorganisms play an important role in the restoration of grassland ecosystems; however, there is no systematic research summary on how microbial communities respond to natural restoration succession in degraded grasslands. In this study, related research results in recent years were summarized and analyzed using meta-analysis. Results showed that soil microbes displayed no significant changes at the early stage (≤5 years) of natural restoration succession, but significantly increased at the following stage (6–10 years) of restoration succession, before decreasing with the continuation of succession. Changes in microbial activity mainly occurred in the 0–20 cm soil depth layer. Numbers of bacteria, fungi, and actinomycetes significantly increased at the six to 10 year stage of restoration succession. When restoration succession ceased after 10 years, most microorganisms began to decrease. During natural restoration succession, the diversity of fungi and bacteroidetes increased, while chloroflexi diversity decreased. These results indicated that the optimal period for the natural restoration succession of degraded grassland was approximately 10 years to ensure that the microbes of the grassland system returned to relatively high levels.

利用自然演替恢复退化草地主要是通过对草地生态系统内部组成部分的结构和关系进行自我调整来实现的。微生物在草原生态系统的恢复中发挥着重要作用；然而，关于微生物群落如何响应退化草地的自然恢复演替，还没有系统的研究总结。本研究对近年来的相关研究成果进行了荟萃分析。结果表明，土壤微生物在自然恢复演替的早期（≤5年）变化不显着，但在恢复演替的下一个阶段（6-10年）显着增加，随着演替的继续而减少。微生物活动的变化主要发生在 0-20 cm 土壤深度层。细菌、真菌和放线菌的数量在恢复演替的 6 到 10 年阶段显着增加。当 10 年后恢复演替停止时，大多数微生物开始减少。在自然恢复演替过程中，真菌和拟杆菌的多样性增加，而绿屈菌多样性减少。这些结果表明，退化草地自然恢复演替的最佳周期约为10年，以确保草地系统微生物恢复到较高水平。大多数微生物开始减少。在自然恢复演替过程中，真菌和拟杆菌的多样性增加，而绿屈菌多样性减少。这些结果表明，退化草地自然恢复演替的最佳周期约为10年，以确保草地系统微生物恢复到较高水平。大多数微生物开始减少。在自然恢复演替过程中，真菌和拟杆菌的多样性增加，而绿屈菌多样性减少。这些结果表明，退化草地自然恢复演替的最佳周期约为10年，以确保草地系统微生物恢复到较高水平。