In the cultivation of edible fungi, water plays a role in providing nutrients for the mycelium and mushroom body, and is an important factor in determining the level of yield and fast turning. The optimum moisture content of most varieties of culture materials is 60% to 65%. In the process of fruiting, the moisture of the culture materials and space is gradually reduced, and the water needs to be replenished in time. The following points should be noted when replenishing the water in the culture medium of the fungus bag: First, the amount of water to be replenished. When the first tidal mushroom is harvested, the nutrients in the substrate are rich, and when the moisture content in the matrix is ​​relatively high, the amount of replenishment should be less; Longer than the second tidal mushroom, the matrix nutrition is reduced, the moisture in the matrix is ​​also reduced, the amount of replenishment can be more, the time for the immersion in the bacterium bag can be longer, and the second is the application of clean river water or groundwater during replenishment. Use surface pond water and ditch water to prevent bacteria and pests from being carried into the matrix and cause damage to pests and diseases. Third, pay attention to temperature changes during replenishment. When the temperature is higher than 20°C, make up less water or supplement with watering method. Moisture, when the temperature is lower than 20 °C, the amount of water can be increased appropriately. Shenzhen urion Technology Co., Ltd. , https://www.urionhealth.com