条件筛选
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What are the causes of contamination in Lingzhi (Ganoderma) spawning?
1. Damage contamination (1) Container damage: mechanical damage caused by failure to handle with care during filling, sterilization, inoculation, transport and cultivation. (2) Air-pocket damage: rapid heating, pressure rise or rapid cooling during sterilization; excessive exhaust speed, causing bags to swell with air and rupture. 2. Cotton plug contamination (1) Cotton plug contamination: the test tube mouth is stained with culture medium or the bottle (bag) mouth is not clean, or the culture medium comes into contact with the cotton plug. (2) Cotton plug dampened: improper stacking during sterilization, too much water added, or unreasonably built sterilization stove, or culture