1. Smash and boil: smash fresh corncob in pulverizer, then boil in pot, ladle out, drain off excessive water and air boiled corncob.
2. Inoculation: mix well with 6 parts of corncob and 4 parts of Black fungus strains.
3. Cultivation: people could choose places where has good ventilation and scattered light, lay down thin film that with a certain amount of holes, then place mixed corncob in thin film, the depth is about 10cm, sell with sandy soil, cover a layer of thin river sand, cover a layer of thin film and press with soil. Mushroom chunks will form in 15 to 20 days and Black fungus bodies will appear in 38 to 41 days in the outdoor temperature of 5 to 15 degrees. When the temperature reaches 15 to 30 degrees, relative air humidity reaches 85% to 95%, whole Black fungus bodies will form after 15 days, on that occasion, people could pick, sell and make dry preparation.
Matters needing attention: people should pay attention to drain off excessive water, after finding that Black fungus bodies have appeared, people could remain scattered light and strictly avoid direct strong sunlight, too high temperature and excessive water-spraying should be avoided to prevent rotten strains and reduction in output.