FIELD: plant growing.
SUBSTANCE: invention is intended for use in manufacture of plant growth stimulator and liquid complex organomineral fertilizers from humus-containing substrates comprising living soil microorganisms, in particular from vermicompost (biohumus), zoocompost, other composts, brown coal, peat, and sapropel. Method comprises preliminarily watering of humus-containing substances and subsequent alkali extraction, separation of alkaline extract, and neutralization thereof. According to invention, after preliminary watering of humus-containing substances and stirring, material is subjected to microbiological fermentation for 3-24 h at 20-35°C and continuous aeration increasing biomass of soil microorganisms. Thereafter, suspension is settled to give enriched aqueous extract. Extract is separated from humus-containing substance and added to neutralized alkali extract of humus-containing precipitate. Alkali extraction is effected with 0.02-0.23 N alkali solution at 60-100°C and separated alkali extract is then neutralized to pH 8.0-9.5. Resulting enriched aqueous extract is stirred and settled to produce desired liquid product.
EFFECT: improved quality of product due to increased amount of humin substances, increased proportion of low-molecular fraction thereof, and enlarged biomass of useful soil microorganisms.
6 cl, 2 tbl, 13 ex
