The invention provides a biological
organic fertilizer and a preparation method thereof. The biological
organic fertilizer is prepared from the following raw materials in parts by weight: 10 to 15 parts of rice
husk, 8 to 12 parts of peanut shell, 10 to 15 parts of
bagasse, 15 to 20 parts of
straw, 20 to 25 parts of
livestock manure, 5 to 10 parts of pond
sludge, 3 to 5 parts of
plant ash, 5 to 10 parts of oil
meal, 5 to 10 parts of
ammonium phosphate, 2 to 5 parts of low-temperature complex microbial inoculants, 3 to 6 parts of seaweed
oligosaccharide, 5 to 10 parts of modified
vermiculite powder and 10 to 20 parts of
photothermal conversion microspheres. According to the invention, waste is taken as a basic
raw material and is matched with
ammonium phosphate to rapidly supplement available nutrients, and meanwhile, the low-temperature complex
microbial inoculant, the modified
vermiculite powder and the
photothermal conversion microspheres are introduced to form a synergistic interaction
system.
Vermiculite powder is modified, so that the
nutrient adsorption and slow release capability is improved, a
carbon source and low-temperature protection are provided for microorganisms, and the
cell membrane stability is enhanced. The
photothermal conversion microspheres efficiently absorb
sunlight and convert the
sunlight into
heat energy, a local and mild heat island effect is formed around the
fungicide, the microenvironment temperature is increased, breeding of the
fungicide is remarkably accelerated, and therefore
organic matter decomposition and
nitrogen conversion are accelerated.