A Strain Of Bactericidal Nitrogen-Fixing Pseudomonas Protegens, A Fermentation Method And An Application Thereof

Provided is a strain of bactericidal nitrogen-fixing Pseudomonas protegens CHA0-ΔretS-NiF, a fermentation method and an application thereof. The strain is deposited under the accession number CGMCC No. 14476. The optimum culture condition thereof is at pH 7, the temperature of 28° C., and rotation speed of 600 rpm. Further provided is a microbial agent containing the Pseudomonas protegens CHA0-ΔretS-NiF as an active ingredient. The Pseudomonas protegens CHA0-ΔretS-NiF has strong nitrogen-fixing and bactericidal capabilities and may be used to prevent and cure plant diseases and to boost plant growth.