TECHNOLOGY FOCUS - AGRICULTURE - Preferred Component: The biological compound fertilizer comprises 12 pts. wt., preferably 10 pts. wt. glial Bacillus spores; 5 pts. wt., preferably 6 pts. wt. solubilizing bacteria; 8 pts. wt., preferably 7 pts. wt. potassium bacteria solution; 25 pts. wt., preferably 27 pts. wt. B. subtilis culture; 7 pts. wt., preferably 9 pts. wt. A. awamori culture; and 6 pts. wt., 7 pts. wt. L. plantarum agent.    TECHNOLOGY FOCUS - BIOTECHNOLOGY - Preferred Component: The B. subtilis culture is prepared by cultivating B. subtilis strain fermentation liquid via inclined plane to obtain B. subtilis fermentation liquid; accessing B. subtilis slope strain into 500 ml shaking bottle at 100 ml medium loading capacity, rotary table operating at 180 revolutions per minute; culturing at 30 degrees C for 24 hours; accessing 10% inoculum size of first-stage seed into 500 ml second level shaking bottle; culturing under same condition with first level seed culture; accessing 10% inoculum size of second-stage seed into 5000 ml third level shaking bottle at 1000 ml medium loading capacity, rotary table operating at 100 revolutions per minute; culturing at 30 degrees C for 24 hours; accessing 10% inoculum size of third-stage seed into 150 liters first-stage seed tank at 100 liters medium loading capacity; culturing at 30 degrees C for 24 hours while stirring at 100 revolutions per minute under ventilation quantity (V/V) of 1:0.5, and pressure of 0.05 MPa; accessing 10% inoculum size of first-stage seeding tank strain into 1.5 ton second level seed tank using 1 ton fermenting culture base; culturing at 28 degrees C for 24 hours while stirring at 100 revolutions per minute and ventilation quantity (V/V) of 1:0.5 and pressure of 0.05 MPa; filtering fermentation liquid through plate frame filter, drying; and adding culture medium with pH of 6.8 and consisting of 6.0% glucose, 1.0% yeast extract, 0.2% peptone, and 1.0% calcium carbonate to obtain B. subtilis culture. The L. plantarum agent is prepared by accessing L. plantarum strain into 500 ml shaking bottle under 100 ml medium loading capacity; culturing at 30 degrees C for 24 hours; accessing 10% inoculum size of first-stage seed into 500 ml second level shaking bottle; culturing under same condition with first-stage seed; accessing 10% inoculum size of second level seed into 5000 ml third-level shaking bottle under 1000 ml medium loading capacity; culturing at 30 degrees C for 24 hours; accessing 5% inoculum size of third-level seed into 150 liters first-stage seed tank under 100 liter medium loading capacity; culturing at 30 degrees C and 0.05 MPa for 18 hours; accessing 5% inoculum size of first-stage seed tank strain into 3 ton second level seed tank under 2 tons medium loading capacity; culturing at 30 degrees C and 0.05 MPa for 22 hours; concentrating fermentation liquid at low temperature and negative pressure to 45% of its original volume to obtain bacteria concentrated liquid; adding carrier into concentrated liquid at weight ratio of 0.5:1; uniformly mixing to obtain L. plantarum agent, in which carrier comprises 25 pts. wt. calcium carbonate and 12 pts. wt. dextrin; and drying at 50 degrees C via fluidized bed to obtain L. plantarum agent. The culture medium has pH of 6.8 and comprises 1.0% cheese peptone, 1% beef extract, 0.5% yeast extract, 0.5% glucose, 0.5% sodium acetate, 0.2% citric acid, 0.10% Tween 80 (RTM: Polyoxyethylene (20) sorbitan monooleate), 0.20% dipotassium hydrogen phosphate, 0.02% magnesium sulfate heptahydrate, 0.005% manganese sulfate hydrate, 2.0% calcium carbonate, and 1.5% agar. ACTIVITY - Fertilizer.