The invention provides a liquid biological
organic fertilizer with high content of organic substances and a preparation method. The
fertilizer is characterized by comprising the following components by weight: 60% of a
humic acid release inhibitor, 0.4% of a composite
biological agent, 10% of
fulvic acid potassium, 12% of
soluble nitrogen-
phosphorus-
potassium raw materials, 9% of a chelating medium
trace element agent, 8.47% of a
soil conditioner, 0.93% of compound
sodium nitrophenolate and 0.1% of
naphthalene acetic acid; and the
fertilizer is prepared by mixing, heating, chelating, concentrating, cooling,
microorganism adding, filtering and residue removing. The invention has the following beneficial effects:
plant nutrition is directly supplemented; the contents of absorbable organic substances for a
root system in soil are rapidly supplemented; growth of the
root system is rapidly promoted; absorption area of the
root system is enlarged; the chelating medium
trace element agent can not be fixed by the soil and exists in a
free state in the soil, so the chelating medium
trace element agent is easy to be captured and absorbed by the root
system in the soil; physiological diseases and pests are prevented from occurrence; quality of an agricultural product is improved; root-rot
disease and stem-rot
disease are prevented from occurrence; occurrences of
fusarium and
verticillium wilts and
bacterial wilt are reduced; meanwhile, the
fertilizer is capable of resisting
salinity and
alkalinity, resisting
continuous cropping diseases, and killing soil-borne diseases.