Screening and Capacity Analysis of Phosphorus Dissolving Bacteria in the Rhizosphere of Cunninghamia lanceolata

In order to screen phosphate solubilizing bacteria in rhizosphere soil and improve available phosphorus content in soil, 10 phosphate solubilizing bacteria were obtained from rhizosphere soil samples of Cunninghamia lanceolata plantation collected from Nanyu forest farm of Fujian Province, using Ca₃(PO₄)₂ phosphate as insoluble phosphorus source. The results of morphological and molecular identification showed that they belonged to 5 genera and 9 strains of Acidimicrobidae, Proteobacteria and Firmicutes, respectively. Paraburkholderia CX−2, Micrococcus yunnanensis CX−5 and Bacillus thuringiensis CX−7 have strong ability to dissolve calcium phosphate, iron phosphate and aluminum phosphate respectively, and the ability to dissolve phosphorus is relatively stable at the environmental pH 5–6 and temperature 20–30 ℃, which can be used as candidate strains for the development of C. lanceolata microbial fertilizer.