Vegetation restoration greatly alters soil phosphorus (P) fractions and microbial community diversity, but the response of soil P dynamics to microbial activity, particularly to that of phosphorus-solubilizing bacteria (PSB), remains unclear. This study aimed to evaluate the effect of vegetation restoration on the content of various P fractions and by extension on the diversity of PSB. We also attempted to discover the role of PSB in promoting the availability of P in vegetation restoration chronosequence. According to the vegetation restoration sequence, soil samples were collected from bare land and forests stands of 6, 10, 34, and 80 years old. The PSB was detected by phoD gene function and the soil P fractions were determined by the Hedley sequential fractionation method as modified by Tiessen and Moir. We found that vegetation restoration effectively improved soil available P content, but there was no significant difference in soil available P content in 80-year and 34-year stands. Residual-P accounted for the largest proportion in all stages of vegetation restoration, up to 55%. With stand development, the diversity of soil PSB increased and reached its maximum in R34. The rare PSB groups greatly promoted the increase of PSB abundance. Proteobacteria was the main soil PSB expressing a large amount of acid phosphatase in the whole vegetation restoration sequence, which played an important role in the mineralization of HCl-Po. Although the relative abundance of Ramlibacter and Lysobacter was relatively low, they also played important roles in the mineralization of Residual-P and NaHCO₃-Po, respectively.

植被恢复极大地改变了土壤磷（P）的含量和微生物群落的多样性，但是土壤磷动力学对微生物活性，特别是对溶解磷的细菌（PSB）的响应尚不清楚。这项研究旨在评估植被恢复对各种P组分含量的影响，并扩展对PSB多样性的影响。我们还试图发现PSB在促进植被恢复时序中P的可用性方面的作用。根据植被恢复顺序，从6、10、34和80年的光秃秃的土地和林分中收集土壤样品。通过phoD基因功能检测PSB，并通过Tiessen和Moir改进的Hedley顺序分馏方法确定土壤P分数。我们发现植被恢复有效地提高了土壤有效磷含量，但在80年和34年林分中土壤有效磷含量没有显着差异。残留磷在植被恢复的所有阶段所占比例最大，达55％。随着林分的发展，土壤PSB的多样性增加并达到R34的最大值。稀有的PSB群体极大地促进了PSB数量的增加。在整个植被恢复过程中，变形杆菌是主要的土壤PSB，其表达大量的酸性磷酸酶，这在HCl-Po的矿化中起着重要的作用。尽管Rmlibacter和Lysobacter的相对丰度相对较低，但它们分别在Residual-P和NaHCO ₃ -Po的矿化中也发挥了重要作用。