One of the key reasons for bagging of shiitake mushrooms is that the output is not high. The success of the color conversion is that the villous mycelium is lodging, showing a thin layer of brown and shiny pellicle. The failure of color conversion appears as follows: 1. The color change is too light or uneven The mycelium is grayish or grayish black because the high temperature above 28°C is encountered for several consecutive days after the bag unpacking, or the temperature is always below 12°C, resulting in poor mycelial growth. The salvage measures are: ventilation should be performed in the morning and at night when the temperature is too high; the temperature can be too low to open the shade on the mushroom shed during the day, use sunlight to increase the temperature of the mushroom house, or take warming measures to keep the room temperature at 15 °C or more. 2. The reason why the hypha grows too long and its solutions are as follows: 1 There are too many iron sheets and urea added in the culture material, resulting in imbalance of carbon and nitrogen ratio. The ratio of carbon to nitrogen must be controlled when the ingredients are 20-30:1; 2 The temperature of the mushroom bed is high , The temperature difference is small, should reduce the mushroom bed temperature, widening the temperature difference; 3 germination time is insufficient, take the bag too early, should be appropriate to extend the time of hair Yin, so that enough bacteria, timely bagging; 4 mycelium recovered after bagging recovery time Too long, it is necessary to grasp the time to recover after bagging is 3-5 days; 5 After the hyphae are thick, there is no timely ventilation, and the film should be uncovered on a sunny day at noon for 3-5 hours, and the ventilation should be strengthened so that the surface of the fungus tube will not dry out. , And then cover the film to make it turn color, such as still does not change color; can be sprayed 3% of the lime water, the film will turn color. 3. Hyphae dehydration rescue measures are several days of spray moisturizing cooling, daily ventilation for 30 minutes. Shanghai J.Shine Co.,Ltd , https://www.jshinechem.com