The invention discloses a strain of Enterobacter ludwigii PN6 and its application. The classification of this strain is named Enterobacter ludwigii, the strain number is PN6, and it is conserved in the China Center for Type Culture Collection, and the conservation number is: CCTCC NO:M 2019881. The strain PN6 screened from the root system of the phyllostachys edulis has a significant antibacterial effect on the pathogen of Ceratococcus phyllococcus, the antibacterial rate of the fermentation broth can reach 49.28%, and it has the efficient ability to solubilize phosphorus and secrete IAA; The strain PN6 of the present invention has a promoting effect on the growth of Phyllostachys edulis, and the test data shows that the liquid microbial agent made of PN6 has a significant growth-promoting effect on the growth indicators of Phyllostachys edulis ground diameter, seedling height and chlorophyll. And it can increase the resistance of Phyllostachys edulis as well as reduce the probability of shoot blight of Phyllostachys edulis. Therefore, the present invention provides excellent strain resources for the development of environmentally friendly Phyllostachys edulis biological special fertilizers.4/4 Figure 7
