The present invention belongs to the technical field of slow-release
fertilizer coating material preparation, and relates to an
environmental protection type slow-release
fertilizer coating material preparation method, which comprises: taking a natural skim rubber, pre-treating, taking
manihot esculenta
starch, and modifying to obtain
modified starch for spare; and adding the
modified starch to the natural skim rubber, rapidly and uniformly mixing, adding a cross-linking agent and a short chain
starch activator, and carrying out a reaction to obtain a
starch grafted and modified natural skim rubber
emulsion, ie., the
environmental protection type slow-release
fertilizer coating material. According to the present invention, the pre-activation short chain starch emission
grafting technology is used, the process is simple, and the reaction is stable; and according to the obtained slow-release fertilizer coating material, the slow-release property of the fertilizer can be regulated, the coating has good
toughness and good soil burying degradation property, the high added value utilization of the natural skim rubber is easily achieved, the
natural environment protection and the l
petrochemical resource saving are easily achieved, and the
traditional agriculture is easily converted into the green organic
agriculture.