Straw mushroom is a kind of thermophilic and hi moist grass rot fungus. The cultivation technique is easy to grasp and the production cost is low. It is the fastest growing type of mushroom. However, after the straw mushroom is sown, some abnormal phenomena often occur during its growth, which affects both the yield and the quality. The causes and prevention measures of the abnormal phenomenon that appear in the growth of the straw mushroom are introduced as follows for the reference of the straw mushroom grower. First, the hyphae atrophy In general, about 12 hours after sowing straw mushroom germination began to germinate, and continue to grow within the material. Hyphae atrophy may have occurred if the hyphae did not germinate or grow into the material 24 hours after sowing. Causes of hyphae atrophy 1 Burnt bacteria. When the temperature in the culture medium exceeds 45°C for a long time, the hyphae will shrink and die. 2 drug effects. The straw mushroom is very sensitive to pesticides. After sowing, some mushroom farmers spray pesticides to prevent insects from killing insects, causing the mycelium to shrink due to phytotoxicity. 3 hypoxia asphyxia. The moisture content of the culture material is too high (more than 70%) or the plastic film is covered too tightly, so that the mushroom mycelium shrinks due to lack of oxygen and suffocation. 4 ammonia hazards. The excessive amount of urea added in the culture medium or the content of the fertilizer in the field is too high, and the ammonia gas that is volatilized can not be emitted, causing harm to the mycelia of the straw mushroom. 5 strains are inferior. The bacterial strain is too short or too long, weak in viability, poor in stress resistance, and atrophy under unfavorable environmental conditions. 6 temperature difference is too large. The mycelium of straw mushroom is more sensitive to the temperature difference, such as the daytime temperature above 32°C, and the nighttime temperature below 28°C. Hyphae atrophy occurs after spraying water. 7 Infestation occurs. Pests appear in the culture material, and the hyphae shrink due to pests biting. Mycelial shriveling prevention Straw mushroom has a short growth cycle. When the hyphae shrink, it is necessary to find out the cause promptly, take effective measures, and replant the new species to reduce unnecessary losses. Specific measures are: 1 to prevent the temperature is too high. When cultivated in Yangshuo, it is best to use a simple awning to prevent the hyphae from burning out at high temperatures at noon. During the process of composting, when the material temperature reaches around 75°C, it is turned twice. The thickness of the material when entering the bed depends on the season, and it should be thicker in the early spring and late autumn. 2 do not use pesticides. The prevention and treatment of pests should be done when raw materials are processed, and no pesticides can be applied to the surface after sowing. 3 Moisture should be appropriate. The moisture content of the culture material at the time of sowing was about 62%, and the degree of oozing from the finger joints was found to be 1 to 2 drops of water droplets with the hand-grip material. In the case of culture materials with high moisture and air temperature, the film covering the material surface should be supported to facilitate ventilation. 4 Prevent ammonia damage. The addition of urea should not exceed 0.2%, and it should be added when stockpiling. 5 selection of high quality strains. The straw mushroom strains are 15 to 20 days old with mycelial growth, uniform distribution of mycelium, vigorous and orderly growth, hyphae and luster, and red-brown chlamydospore, no miscellaneous bacteria and no insects. Strains with a bacterial age greater than 1 month should not be used. 6 according to temperature water. The water transfer of culture materials should be controlled flexibly according to the temperature at that time, and the water temperature of the water spray should be basically the same as the temperature. 7 do a good job in environmental health, pay attention to pest control. The cultivation site should be far away from the livestock and poultry pens, the materials should be clean and free of mildew, and be exposed for 2 to 3 days before use. Mushroom completely disinfected to eliminate the source of insects. Second, the hyphae in the fungus stage, when the material surface appears a lot of white villous aerial hyphae is the hyphae. After the mycelium grows too long, it cannot be transferred into reproductive growth in time, the buds are postponed, there are fewer mushrooms, and the yield is low. The hyphae are more likely to be prolonged due to poor ventilation and high temperatures in the material bed, high humidity, and high concentrations of carbon dioxide, which stimulate the mycelia. The hyphae's preventative material covers the plastic film, and 2 to 3 days later, according to the growth of the mycelia, the film is removed periodically during the day to allow appropriate ventilation and cooling and dehumidification to promote the growth of the mushroom mycelia.
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