Analysis of Common Problems in King Oyster Mushroom Cultivation
King oyster mushroom is one of the edible mushroom species developed in China in recent years. Its production cycle is short, results come quickly, and its economic benefits are relatively high, so its planting area has continued to expand. However, problems often arise in king oyster mushroom production, causing huge losses to mushroom farmers, so attention must be paid to them. 1. Contamination of mushroom bags causes...
King oyster mushroom is one of the edible mushroom species developed in China in recent years. Its production cycle is short, results come quickly, and its economic benefits are relatively high, so its planting area has continued to expand. However, problems often arise in king oyster mushroom production, causing huge losses to mushroom farmers, so attention must be paid to them.
1. Contamination of mushroom bags The direct cause of contamination in most mushroom bags is incomplete sterilization. Under suitable moisture and temperature conditions, the contaminating microorganisms in the mushroom bags that have not been killed begin to multiply, at first appearing as scattered specks on the bags, then later spreading into patches. Reasons leading to incomplete sterilization: (1) When mixing the substrate, the culture material did not fully absorb water, and there was dry material inside, especially in harder-textured culture materials such as sawdust and corncobs, where this situation is prone to occur. (2) During the sterilization process, the cold air was not completely expelled, and part of the sterilization pot was always occupied by cold air, resulting in poor heat circulation. (3) Insufficient sterilization time, or a stoppage of heating during the sterilization process, or too many mushroom bags placed too tightly in the sterilization pot can all lead to the problem of incomplete sterilization.
2. Slow mycelial growth (1) Weak spawn vigor can cause slow mycelial growth. Be sure to purchase spawn from larger-scale, reputable units. The suitable spawn age is 30-40 days, and white, dense, thick mycelium indicates strong vitality. (2) If the mushroom bags are packed too tightly or the water content is too high (above 65%), the lack of sufficient oxygen in the bags inhibits the growth rate of the mycelium. (3) If the incubation temperature is too low, such as below 20°C, and ventilation is poor or the pH of the culture material is unsuitable (the suitable pH is about 7), it can also cause slow mycelial growth.