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How to prevent and control excessive browning of shiitake mushroom logs that results in no fruiting
1. Causes of the problem. Log browning is a physiological process in the development of shiitake mushroom mycelium and is also a sign of physiological maturity of the mycelium. Suitable conditions for log browning: temperature of 18°C to 24°C, air humidity of 80% to 85%, some scattered light, and good ventilation. If the indoor temperature exceeds 25°C during browning and this high temperature lasts for a long time, it can cause the logs to secrete large amounts of yellow water and pigments, thereby forming a thick brown mycelial skin. The thick mycelial skin formed can block air, causing the mycelium to receive no oxygen and be unable to
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Key points to note during the fruiting period of shiitake mushrooms: regulation of temperature and humidity differences
Increase the day-night temperature difference. In late autumn and early winter, daytime temperatures are high and nighttime temperatures are low. Cover with a layer of film during the day so that the temperature inside the mushroom bed is 2°C-3°C higher than outside the film, then open the film after 10 p.m. so the temperature drops rapidly. After several consecutive days, a large number of primordia will emerge on the surface of the mushroom logs and develop into mushroom buds. Control the humidity of the mushroom yard. After color change, initially maintain the relative humidity of the mushroom bed at about 85%. As large numbers of mushroom buds differentiate into caps and stipes, lower the air humidity to about 80%. Create a suitable dry-wet difference. In the early stage of autumn mushrooms, the internal water content of the mushroom logs is relatively sufficient and can safely
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