Preparation method and application of compound bacterial powder for resisting diseases and promoting growth of tobaccos

The invention discloses a preparation method and application of tobacco disease-resistant and growth-promoting compound bacterial powder, and belongs to the technical field of screening of tobacco disease-resistant and growth-promoting compound bacterial strains and bacterial powder preparation.The preparation process includes the steps that rhizosphere soil at the positions, 5-15 cm deep, of healthy plants around diseased plants is taken and evenly mixed, sterile water is added, and the mixture is stirred evenly; after standing, inoculating the supernate on a TBS culture medium, carrying out enrichment culture for 36 hours, and carrying out passage twice to obtain a secondary seed solution; inoculating the secondary seed solution into a fermentation culture medium according to the inoculum size of 10%, and culturing for 30 hours to obtain a liquid strain; adding the liquid strain into white carbon black, continuously stirring to enable the carrier to be fully adsorbed, stopping adding the liquid strain when