NOVELTY - Liquid fertilizer comprises 48-52 pts. wt. smoke residue, 4-6 pts. wt. sodium sulfate, 33-36 pts. wt. Brassica rapa slag, 4-5 pts. wt. calcium propionate, 35-38 pts. wt. bone cement, 5-8 pts. wt. sodium phosphate, 130-140 pts. wt. livestock and poultry feather waste, 4-7 pts. wt. copper sulfate, 6-8 pts. wt. ferrous sulfate, 4-5 pts. wt. genetically modified microbial agent, and balance amount of water.    USE - Liquid fertilizer is useful for reducing pesticide residues and toxic effects of heavy metals, and promoting crop nutrient absorption.    ADVANTAGE - The liquid fertilizer has rich nutritional content and prolonged service life, increases surface area of soil particles and absorption of pollutants in soil, and improves soil fertility.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of liquid fertilizer involving taking livestock and poultry feather waste and then washing, drying the feather waste and then crushing, adding 3 mol/l sulfuric acid solution to the crushed feather waste, uniformly mixing, placing the mixture in a microwave oven and then hydrolyzing for 240-260 minutes, adding 6 mol/l potassium hydroxide solution to the mixture and then placing in a microwave oven, hydrolyzing the mixture for 280-320 minutes to obtain a hydrolysis liquid and then stirring, filtering the mixture to obtain a supernatant and then cleaning organic residues, adding calcium propionate and copper sulfate to the mixture and then adjusting pH value to 6, heating the mixture at 50-60 degrees C and then reacting for 70-90 minutes, adding ferrous sulfate to the mixture and then reacting, increasing the temperature to 70-80 degrees C for 40-60 minutes to obtain a composite amino acid chelate solution, adding bone cement, smoke residue and Brassica rapa slag to the composite amino acid chelate solution and then placing in a fermentation tank, adding water to the mixture and then fermenting under a moisture content of 40-50%, composting the mixture for 35-42 days, adding 8-10 pts. wt. water and genetically modified microbial agent to the mixture and then stirring, placing the mixture in a sealed container and then fermenting for 30-40 hours, filtering the mixture and then anaerobically composting, adding sodium sulfate, sodium phosphate and remaining raw materials to the mixture and then uniformly mixing, placing the mixture in a magnetic machine, and magnetizing for 8-10 minutes.