The invention provides a preparation method of a root
fertilizer for preventing and treating diseases and pests attacking
curcuma zedoary. The preparation method comprises the following steps: (1) weighing 30-50 parts by weight of Chinese mesona
herb residues, 20-40 parts by weight of sheep
manure, 15-20 parts by weight of peanut
bran, 5-10 parts by weight of molasses, 5-10 parts by weight of marigold, 10-15 parts by weight of
coffee grounds, 3-8 parts by weight of
Derris trifoliata, 3-8 parts by weight of
Polygonum hydropiper and 5-8 parts by weight of
borax; (2) separately crushing the marigold,
coffee grounds,
Derris trifoliata,
Polygonum hydropiper and
borax, separately carrying out sieving with a
sieve with a size of more than 40 meshes, and putting the sieved materials aside for later use; (3) adding the sheep
manure and EM
bacteria into the Chinese mesona
herb residues, carrying out mixing, stacking and fermenting for more than one month until the Chinese mesona
herb residues are completely melted into loose
powder so as to obtain a decomposed material; (4) uniformly mixing the decomposed material with the peanut
bran, molasses, marigold,
coffee grounds,
Derris trifoliata,
Polygonum hydropiper and
borax powder, adding a proper amount of water until the materials are wet, and carrying out hermetical stacking for 3-5 days; and (5) granulating the stacked materials by usinga drum
granulation method so as to obtain granules, spraying a layer of
alcohol waste liquid on the outer layer of each granule, and carrying out
drying, sealing and packaging to obtain a product. The product prepared by using the method not only can be used as a root
fertilizer for
curcuma zedoary, but also can prevent and treat the
root rot disease of
curcuma zedoary.