NOVELTY - City compost microbe composition is extracted by separately cultivating, separating the city compost in a solid culture medium for growing of different strains, and inoculating separated pure strain to a liquid medium to conduct enrichment culture to identify compositions of effective microbes in the compost.    USE - Method for extraction of city compost microbe composition (claimed).    ADVANTAGE - The method provides powerful technological support for applying strains that have been conducted separation culture from the city compost in lawn plant establishment system.    DETAILED DESCRIPTION - Extraction of city compost microbe composition involves adding distilled water, deionized water or tap water in a beaker, and adding EDTA (0.1 g/liter). Sodium hydroxide (100 g/liter) or hydrochloric acid (100 g/liter) is used to adjust pH value to 4.5-7.2. Buffering agents are added and packaged. The strains are placed into a high-pressure steam sterilizing autoclave to sterilize, and cooled. They are transferred to panels. Every kind of strains is poured into 3 dishes. Sterilized water (90 ml) is added to fresh compost (10 g). Shaking is carried out for 20 minutes to prepare compost liquor whose dilutability is 10-1-10-6. Marking pen is used to mark 0.0001, 0.00001, and 0.000001 of dilutability on bottoms of the panels of the culture mediums or on periphery of the culture medium. Marking 3 dishes for every culture medium of every dilutability is carried out. Sterilized transfer guns with measuring range of 20-200 mu liter are used to suck compost dilution from 0.0001, 0.00001, and 0.000001 tubes. The dilution is placed into corresponding center of the panels with the marked the dilutability respectively, 0.2 ml for every dish. A sterilized glass coating bar is used to uniformly and lightly coat on culture medium watch glass, and heated for 5-10 minutes at room temperature. The panels containing the Gause culture medium I are placed upside down to cultivate for 5-7 days at 28 degrees C. Panels containing the potato glucose culture medium are placed upside down to cultivate for 3-5 days at 28 degrees C. Panels containing the beef extract peptone are placed upside down to cultivate for 1-2 days at 37 degrees C. The beef extract peptone culture medium comprises 1.25 g beef extract, 2.5 g peptone, 11.25 g sodium chloride, and 250 ml water. The pH value is kept at 7-7.2. Sterilizing is done for 20 minutes. The potato glucose culture medium comprises 40 g potatoes, 4 g glucose, and 200 ml water. It is kept at neutral pH, and sterilized for 20 minutes. The Gause synthetic culture medium I comprises 4 g soluble starch, 0.2 g potassium nitrate, 0.1 g sodium chloride, 0.1 g trihydrate dipotassium phosphate, 0.1 g magnesium sulfate heptahydrate, 0.002 g ferrous sulfate heptahydrate, and 4 g agar. Two dips of 5% phenol solution and 200 ml distilled water are added. The pH value is kept at 7.2-7.4. Sterilizing is done for 20 minutes at 0.1 MPa. The strains are taken by fired inoculating loops. The inoculating loops are used to touch a part of the culture medium that has no strains to cool the inoculating loops and avoid killing the strains. The inoculating loops are used to lightly take a few strains and put to the liquid culture medium. The inoculating loops rub on places where the liquid touches bottle wall to scatter the strains into the liquid. Tampons are plugged in after inoculating. Lightly shaking the liquid culture medium is done to uniformly distribute the strains in the culture medium for better growth. The liquid culture medium is placed in a rotary jerking table to conduct vibration culture of the microbes. Conical flasks fixed on the jerking table will rotate along with the jerking table at 200-250 rpm to drive the strains to rotate on inner walls of the conical flasks. The jerking table is kept at 30 degrees C. After cultivating for 24~48 hours, if the culture medium becomes turbid, the strains have grown in the culture medium. The strains are placed into a refrigerator to store to obtain constituent strains of compost microbes.