The invention relates to a preparation method and
coating method of a biodegradable temperature-responsive slowly-
controlled release fertilizer coating material. Agricultural organic waste containing
cellulose serves as the
raw material and is crushed, sieved, modified with
dopamine and subjected to
enzyme activation
secondary treatment, and activated
powder is obtained; the activated
powder is mixed with a thermo-sensitive poly
phosphate ester
monomer, an initiator and a beta-
cyclodextrin accelerant, the mixture is heated and stirred, a free
radical polymerization reaction is conducted under protection of the
inert gas, and the biodegradable temperature-responsive slowly-
controlled release fertilizer coating material is obtained after
vacuum drying is conducted; and the biodegradable temperature-responsive slowly-
controlled release fertilizer coating material is heated to be a
molten state and smeared on surfaces of fertilizer particles in a coating
machine, and coated slowly-controlled release fertilizer can be obtained.
Dopamine-activated agricultural organic waste is adopted from the angle of
bionics, a
polymerization reaction is effectively promoted in combination with
enzyme activation
secondary treatment, and production efficiency is improved; and meanwhile, the thermo-sensitive poly
phosphate ester
monomer serves as a cross-linking agent, the beta-
cyclodextrin serves as the
accelerant, and
polymerization reaction time is shortened, so that the fertilizer intelligently regulates and controls nutrients along with
soil temperature change.