Preparation method for phosphite- chitosan oligosaccharide composite biological medical fertilizer

The present invention relates to phosphite - Preparation of chitosan oligosaccharide biopharmaceutical compound fertilizer. Phosphite - shell bioavailability oligosaccharide compound fertilizer, by phosphite, chitosan oligosaccharide, vinegar biomass by 40 to 60: 5 to 15: weight ratio of 200 to 375 ratio, is made using complex technology the unity of the drug compound fertilizer biological fertilizer. The preparation method comprises the steps of: chitosan oligosaccharide - Preparation of the biomass composite drug solution vinegar, phosphite - Preparation of the biomass composite drug solution vinegar, phosphite - Shell biopharmaceutical oligosaccharide compound fertilizer. Phosphite - oligochitosan complex biological insecticide and fertilizer, is a "both prevention and treatment," the residue-free, pollution-free, safe and environmentally friendly "Fertilizer double effect" of biological fertilizer, both as a bio-fertilizer, but also a bio-pesticides, it is also a heavy metal contaminated soil in situ remediation agent.