The invention relates to the technical field of agricultural
biology, and particularly discloses a preparation method and application of a Chinese herbal
medicine extract
fertilizer for enhancing
immunity, the preparation method comprises the following steps: S1, performing
water extraction and
alcohol precipitation extraction on Chinese herbal
medicine raw materials to obtain a Chinese herbal
medicine extracting solution and medicine residues; s2, crushing the obtained medicine residues, inoculating white-rot fungi or
bacillus subtilis, and performing
solid-state
fermentation at the
fermentation temperature of 25-35 DEG C for 5-7 days to obtain a
fermentation product; s3, concentrating and
drying the obtained Chinese herbal medicine extracting solution to obtain Chinese herbal medicine extract
powder; s4, the obtained Chinese herbal medicine extract
powder is mixed with
humic acid,
ferric salt or
zinc salt is added, stirring reaction is conducted under the condition that the pH ranges from 5.0 to 6.5, and a Chinese herbal medicine-
humic acid metal chelate is formed; chinese herbal medicine compound extraction and microbial
solid fermentation are combined, and traditional waste medicine residues are converted into high-activity
organic fertilizer carriers, so that efficient utilization of resources is realized, meanwhile, the immune induction function of the
fertilizer is enhanced, and the
disease resistance of crops is remarkably improved.