Method for improving yield and quality of dendrobium officinale

The invention discloses a method for improving the yield and quality of dendrobium officinale. The method comprises the following steps: (1) additionally applying a quick-acting nitrogen fertilizer ona field from April to June, spraying a potassium dihydrogen phosphate solution for 2-3 times in every month from April to August, and releasing electromagnetic waves after spraying is completed; (2)inoculating an optimized monascus strain liquid into a fermentation liquor in a fermentation tank, controlling the temperature to be 20-30 DEG C, sealing the fermentation tank for 9-21 days, adding atraditional Chinese medicinal material extracting solution into the fermentation tank, carrying out ultrasonic concussion and uniform stirring, controlling the temperature to be 19-31 DEG C, adding achromobacterium suttsuga strain, sealing the fermentation tank for 9-21 days, carrying out filtering to obtain a filtrate, dissolving salicylic acid, magnesium sulfate and coumarin into the filtrate so that the concentration of