TECHNOLOGY FOCUS - AGRICULTURE - Preferred Components: Microelement is zinc, iron, or boron; the plant organic nutrient is glycine, vitamin B1, vitamin B6, inositol, or nicotinic acid. Preferred Method: In the step (i) taking the cultured EM microbial inoculum, and directly obtaining EM liquid; in the step (ii) taking EDTA-iron, EDTA-zinc, boric acid, ammonium sulfate, and EM liquid, mixing to obtain the trace element solution, in the step (iii) taking glycine, vitamin B1, vitamin B6, inositol, nicotinic acid, and EM liquid, mixing to obtain the plant organic nutrition solution. In the step (i), adding EM bacteria solution containing EM strain, brown sugar, rice vinegar, wine, and water in a fermentor and fermenting to obtain bacteria solution, and filtering resulting fermentation bacteria solution; in the step (ii) taking EDTA-iron, EDTA-zinc, boric acid, ammonium molybdate and EM bacteria solution according to the mass ratio of 20-21:0.5-2:1-3:0.1-0.2:78.4-73.8, mixing, reacting at 50-55 degrees C, stirring at a speed of 100 revolutions/minute for 30-40 minutes to obtain the trace element solution; in the step (iii), taking glycine, vitamin B1, vitamin B6, inositol, nicotinic acid, and EM liquid according to mass ratio of 1-2:0.5-1:0.2-0.4:13-25:2-5:66.6-78.3, mixing, reacting at 30-35 degrees C, stirring at a speed of 100 revolutions/minute for 20-30 minutes to obtain the plant organic nutrition solution; in the step (iv), mixing EM liquid, trace element solution, and plant organic nutrition solution according to the mass ratio of 92-98:1.5-3:0.5-5, mixing, reacting at 30-35 degrees C, stirring at a speed of 100 revolutions/minute for 20-30 minutes, at the same time, vacuum pumping in the filter kettle, and then filtering by filter to obtain the liquid fertilizer. In the cultivation of blueberry seedling using liquid fertilizer, in the step (ii), taking EDTA-iron, EDTA-zinc, boric acid, ammonium molybdate, and EM liquid according to the mass ratio of 20:2:1:0.1:76.9; in the step (iii), taking glycine, vitamin B1, vitamin B6, inositol, nicotinic acid, and EM liquid according to the mass ratio of 1-2:0.5-1:0.2-0.4:13-25:2-5:66.6-78.3; in the step (iv), mixing the EM liquid, trace element solution, and plant organic nutrition solution according to the mass ratio of 96.5-97.5:1.5-2:1-1.5. In the blueberry field production using liquid fertilizer, in the step (ii), taking EDTA-iron, EDTA-zinc, boric acid, ammonium molybdate, and EM liquid according to the mass ratio of 20:2:2:0.1:75.9; in the step (iii), taking glycine, vitamin B1, vitamin B6, inositol, nicotinic acid, and EM liquid according to the mass ratio of 1-2:0.5-1:0.2-0.4:13-25:2-5:66.6-78.3; in the step (iv), mixing the EM liquid, trace element solution, and plant organic nutrition solution according to the mass ratio of 95-98:1.5-3:0.5-2. In the blueberry tree transplanting using liquid fertilizer, in the step (ii), taking EDTA-iron, EDTA-zinc, boric acid, ammonium molybdate, and EM liquid according to the mass ratio of 20:3:2:0.1:74.9; in the step (iii), taking glycine, vitamin B1, vitamin B6, inositol, nicotinic acid, and EM liquid according to the mass ratio of 1-2:0.5-1:0.2-0.4:13-25:2-5:66.6-78.3; in the step (iv), mixing the EM liquid, trace element solution, and plant organic nutrition solution according to the mass ratio of 93-96:1.5-2.5:2.5-4.5. ACTIVITY - Fertilizer.