Detailed Explanation of Key Techniques for Rapid Mycelial Growth of Oyster Mushrooms in Spring

In spring, temperatures are low and oyster mushroom mycelium grows slowly. Measures such as increasing the amount of lime, bagging directly, increasing the inoculation amount, creating multiple holes for oxygen supply, stacking bags for mycelial growth, raising the greenhouse temperature, and regularly turning the stacks can ensure successful mycelial growth. Generally, the mycelium fully colonizes the bags in 20 days, primordia form in about 1 month, and fresh mushrooms can be harvested and brought to market in about 35 days.

1. Increase the amount of lime. When mixing the substrate, increase the lime amount to 5%, bringing the pH of the substrate to 8-9, so as to inhibit the growth of contaminating microorganisms and increase the mycelial growth rate.

2. Bag directly. After the raw substrate is mixed, bag it directly without fermentation, which allows the substrate in the bags to generate more heat and speeds up mycelial growth.

3. Increase the inoculation amount. When bagging, appropriately increase the inoculation amount, changing from 3 layers of inoculation to 4 layers of inoculation. The spawn blocks in the middle can be larger, pressed tightly against the plastic bag, with 4-5 blocks inoculated per ring. The spawn blocks at both ends of the bag can be smaller, with 6-7 blocks inoculated per end.

4. Create multiple holes for oxygen supply. After the bags are tied closed, use a wooden stick 10 mm-12 mm in diameter to poke 4-5 ventilation holes at the inoculation points at both ends of each bag, with a depth equal to half the bag length, ensuring sufficient oxygen supply for mycelial growth inside the bags. In this way, the mycelial growth time can be shortened to 15 days-20 days, and the mycelium is thick and white, with a contamination rate below 2%.

5. Stack bags for mycelial growth. In the mushroom greenhouse, place the bags side by side in stacks of 4-6 layers, and cover with straw mats for insulation. This stacking can raise the substrate temperature inside the bags to 23°C-28°C, allowing rapid mycelial growth.

6. Raise the greenhouse temperature. Cover the mushroom greenhouse with anti-drip film and straw mats. On sunny days, pull back the straw mats on the roof during the day to raise the temperature inside the greenhouse to 20°C-23°C. The bags should always be covered with straw mats to ensure mycelial growth in darkness, making the mycelium thick and white.

7. Regularly turn the stacks. During the mycelial growth period, insert a thermometer into the middle layer of bags. When the temperature reaches 30°C, turn the stacks promptly and ventilate to cool them down, so as to prevent mycelial burning. Even if the substrate temperature does not reach 30°C, turn the stacks once every 3 days-5 days. Swap the upper and lower layers of bags as well as the two ends of each bag, so that the temperatures of the upper and lower bags and the moisture content inside the bags are consistent, promoting rapid mycelial growth.