| abstract |
Disclosed are a biological seed coating agent based on a trichoderma-bacillus sequential inoculation symbiotic culture fermentation liquor, and a preparation method therefor. According to the principle of synthetic biology, a symbiotic bacterium solution is prepared, by means of a staged inoculation co-fermentation technology, from trichoderma having characteristics such as inducing disease resistance and stress resistance, and bacillus having characteristics such as antagonizing pathogenic bacteria and promoting crop growth. The symbiotic bacterium solution is mixed with diatomite and brassinolide in proportion to prepare a powdered biological seed coating agent. The biological seed coating agent comprises high-content spores, antagonistic substances, growth-promoting substances and other substances. |