TECHNOLOGY FOCUS - BIOLOGY - Preferred Components: Each 1000 kg organic mixed particle comprises 300 kg mixture of wheat straw, rapeseed and straw, 600 kg mixture of branches of shrub and trees and cotton straw, 86 kg sheep manure, 4 kg straw decomposition agent and 10 kg acidic compound fertilizer, where the above-mentioned components are mixed and stirred for 10 minutes. Each 1000 kg vegetable seedling matrix comprises 650 kg organic mixed particle, 50 kg seedling promoting agent and 300 kg black soil, where the above-mentioned components are mixed and stirred for 15 minutes. Preferred Method: The method involves preparing organic mixed particle by uniformly stirring the mixture of the step (a), stacking the mixture, sprinkling the decomposing inoculant for growth and propagation of bacteria, mixing crushed material, covering the stack with upper cover plastic film for heat preservation, and fermenting the mixture for 2 months. The stack mixture has height of 1.5 m and width of 2 m.    TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Component: Each 1000 kg seedling promoting agent comprises 650 kg nitrogenous fertilizer, 200 kg phosphate fertilizer, 50 kg potash fertilizer and 100 kg filling agent, where the above-mentioned components are mixed and stirred for 15 minutes. The nitrogenous fertilizer includes ammonium sulfate. The phosphate fertilizer includes calcium superphosphate. The potassium fertilizer is potassium sulfate. The silicon fertilizer is one or more of micro-alkaline or neutral mineral fertilizer.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The filling agent is prepared by (a) mixing 40 kg sieved coal ash powder with 10 kg silicon fertilizer, 2 kg fungicide and 0.5 kg plant growth regulator, stirring the mixture for 15 minutes, and (b) adding 42 kg coal ash powder to 6 kg industrial sulfuric acid while stirring process, stirring the mixture for 15 minutes, discharging and allowing the mixture at static condition for 15 minutes to obtain 100 kg filling agent. The fungicide includes 25% wettable powder of carbendazim. The plant growth regulator includes 10% wettable powder of paclobutrazol.