硬开伞蘑菇遇异常气候，幼嫩于实体提早开伞的现象叫硬开伞，一般在１８℃以上、温差１０℃左右或突然降温的情况下发生。可在气温突变前做好保温工作，并增加菇房内的空气相对湿度。 畸形菇形成的原因是覆土粗细不一，出菇部位低，菇房二氧化碳含量超过０．３％；或药害、病虫 Unconscious mushrooms open umbrella case of abnormal weather, young early in the entity to open the umbrella called the phenomenon of hard open parachute, generally above 18 ℃, the temperature difference of about 10 ℃ or sudden cooling occurs. The temperature can be mutated in a good insulation before work, and increase the relative humidity of the air inside the mushroom room. Mushroom formation is due to varying thickness of the soil cover, low fruiting parts, mushroom house carbon dioxide content of more than 0.3%; or phytotoxicity, pests and diseases