The invention belongs to the technical field of production agricultural mulching film, and more specifically relates to a preparation method of an easily-degradable
liquid state mulching film capableof improving
fertility and maintaining water. The preparation method comprises following steps: natural coconut shell flour,
straw ash, and water are subjected to mixing and beating so as to obtain aslurry; the
slurry,
urea, glucose,
peat, and the like are taken as
fermentation raw materials,
thermal insulation fermentation is carried out so as to obtain a broth;
shrimp powder is taken as a
raw material so as to obtain a
shrimp shell gel solution; a
fertility improving pre-polymerized
urea formaldehyde gel solution, a mulching film
water retention gel solution, and oxidized
starch are mixed and heated so as to obtain a suspended dispersion liquid, and a lower layer gel solution is collected so as to obtain the easily-degradable
liquid state mulching film. The mulching film water retentiongel solution is a
chitosan-
polyvinyl alcohol-
sodium alginate
composite film liquid; no secondary soil
pollution is caused; the
nutrient elements in composite
fertilizer can be released slowly;
fertility increasing and
fertilizer retention effects are achieved; the mulching film
water retention gel solution is capable of improving the stability of
liquid state mulching film in wet soil; the fertility improving pre-polymerized
urea formaldehyde gel solution and oxidized
starch are subjected to crosslinking so as t oobtain the high
viscosity water absorbing liquid state mulching
film base material, and the application prospect is promising.