随着食用菌的扩大生产,菌种的需求量也逐年增加。当前我国菌种生产,除了一些科研单位外,各地群众也大量生产。由于技术力量薄弱,生产方式原始,设备房屋过于简陋,工艺紊乱,布局矛盾,结构欠佳,致使菌种不纯,杂菌感染严重,废品率高达10～25％,给栽培者带来意外的损失。 With the expansion of mushroom production, the demand for bacteria also increased year by year. At present, the production of mycobacteria in China, except for some scientific research units, is also mass-produced by the masses. Due to the weak technical force, the mode of production is primitive, the equipment houses are too simple, the process is disorderly, the layout is contradictory and the structure is not good, resulting in impure bacteria, serious bacteria infection, the rejection rate is as high as 10-25% loss.