蘑菇菌丝对游离氨很敏感 ,环境中有超过2 0PPM的氨 ,蘑菇菌丝便不能正常生长。我市是全国最大的蘑菇生产基地之一 ,近几年全面推广应用了二次发酵技术 ,蘑菇单产有了显著的提高。同时 ,由于对发酵过程中物质转化机理不清 ,发酵管理不当 ,氨害 (当地俗称“氨烧菌”)问题十分严重 Mushroom mycelium is very sensitive to free ammonia, the environment has more than 20PPM of ammonia, mushroom mycelia can not grow normally. Our city is one of the largest mushroom production bases in the country. In recent years, the secondary fermentation technology has been widely promoted and applied. The yield of mushrooms has been significantly increased. At the same time, the problem of ammonia damage (locally known as “ammoniac bacteria”) is very serious due to the unclear substance conversion mechanism in the fermentation process and improper fermentation management