What are the causes of mycelial shrinkage in straw mushroom cultivation?

1. High-temperature burning of the mycelium: when the temperature inside the compost exceeds 45°C for a prolonged period, the mycelium shrivels and dies.

2. Impact of chemicals: straw mushrooms are extremely sensitive to pesticides. After spawning, growers spray pesticides to prevent diseases and kill insects, causing the mycelium to shrink due to pesticide damage.

3. Oxygen deprivation and suffocation: when the compost has too high a water content (over 70%), or the plastic film is covered too tightly, the straw mushroom mycelium shrinks from oxygen deprivation and suffocation.

4. Ammonia damage: when too much urea is added to the compost, or the field has a high chemical fertilizer content, the ammonia gas released cannot dissipate, harming the straw mushroom mycelium.

5. Poor-quality spawn: when the spawn is too young or too old, its growth weakens and its stress resistance is poor, so it shrinks under unsuitable environmental conditions.

6. Excessive temperature difference: straw mushroom mycelium is fairly sensitive to temperature differences. If the daytime temperature is above 32°C and the nighttime temperature is below 28°C, mycelial shrinkage occurs after heavy watering.

7. Pest infestation: when pests occur in the compost, their biting and feeding damage causes the mycelium to shrink.