The invention relates to a method for reducing the abundance of
tetracycline resistance genes in an
organic fertilizer. The method comprises the following steps: performing
pyrolysis on a bamboo at 600 DEG C to obtain
biochar; then by taking wheat straws in
chicken manure compost as a conditioner, uniformly mixing the air-dried
chicken manure with the chopped wheat straws, and regulating the initial C / N ratio to 25:1; adding the
biochar accounting for 2.5% of the mixture based on
dry weight into the mixture, and adding
distilled water to regulate the
water content to 60%; and after the composted materials are sufficiently and uniformly mixed, performing composting in a full-automatic composting device, wherein
oxygen introduction is ensured by a forced ventilation process. After 26 days of composting,
tetracycline resistance genes (tetG, tetW and tetX) are reduced by 70% or above by the treatment of the added
biochar, and the removal rate is obviously higher than that of the
control treatment. According to the invention, the method reduces the abundance of
tetracycline resistance genes in
chicken manure compost; and meanwhile, the method has the advantages of short composting period, simple equipment, easy operation, low cost, high
compost product stability and safety and the like.