The invention discloses a soilless culture substrate formula used for vertical
greening, and a production method therefor. The production method comprises: weighing and adding a mixture of multi-hydroxyl ethers and a
plasticizer, namely
dibutyl phthalate into a high-pressure reaction kettle; then, adding a natural binder and a catalyst into the high-temperature reaction kettle with stirring, and introducing
inert gas for shielding; finally adding an adosrbent with sufficiently and uniformly stirring, and discharging, thereby preparing a binder for later use; in the presence of an
adhesive added in a wet state, uniformly stirring decomposed straws, grass carbon,
coconut tree peel, coconut shells, branches and tree leaves at high speed to obtain a mixture, then, standing the mixture, adding a self-made binder into the mixture with stirring, pouring the mixture into a mould to form, and discharging the mixture out of mould.
Polyethylene glycol 600 with molecular weight of 570-630,
polypropylene glycol 200 with molecular weight of 180-220, and
polymer polyol are matched in proportion, so that the soilless culture substrate formula can be suitable for splicing most of
cellulose with different molecular weights; pores of a formed three-dimensional net-shaped structure are especially suitable for storing water molecules, so that water absorbing capacity of the whole substrate can be greatly improved, the gravity action can be overcome to certain extent, and the substrate is suitable for vertical
greening.