The invention discloses a preparation method of a coconut shell
powder slow-
release agent for a grape slow-release compound
fertilizer. The preparation method comprises the following steps: stirring coconut shell
powder and a
potassium hydroxide solution, performing filtering,
drying, carbonizing and
grinding on the obtained mixture, adding
hydroxyethyl cellulose and an
aqueous solution of
sulfuric acid, stirring and centrifuging the obtained solution, adding
humic acid and water, performing
ultrasonic dispersion, and filtering,
drying and crushing the obtained mixture to obtain the coconut shell
powder slow-
release agent for the grape slow-release compound
fertilizer. The invention discloses a preparation method of the grape slow-release compound
fertilizer. The preparation method of thegrape slow-release compound fertilizer comprises the following steps:
grinding fruit shell carbon powder, wood chips,
corncob powder,
zeolite powder, diatomite,
vermiculite powder and fermented tobacco stems, adding a
sodium hydroxide solution, performing stirring, and
grinding the obtained mixture to obtain a pre-formed material; and uniformly mixing corn germ
meal,
straw powder,
fish bone meal and
plant ash, adding
soybean oil and water, performing stirring, adding high temperature-resistant alpha-
amylase, performing stirring, inactivating the obtained mixture, adding a precipitated
phosphate fertilizer,
phosphate rock powder,
potassium sulfate and the coconut shell powder slow-
release agent, performing uniform mixing, adding
glutaraldehyde, performing stirring, adding
carboxymethyl cellulose, performing uniform stirring, granulating the obtained mixture, and
drying the granulated mixture to obtain the grape slow-release compound fertilizer.