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1.菌种质量不好。因母种转管次数过多或菌龄过长,造成菌种退化;或因菌种在培养过程中受到30℃以上的高温伤害,致使菌丝失去较强的活力。2.菌种浸死。袋栽培养料含水
1. The quality of bacteria is not good Due to excessive number of mother tube transfer or bacterial age is too long, resulting in strain degradation; or strains in the culture process by 30 ℃ or more high temperature damage, resulting in hyphal loses strong vitality. 2. species dipped. Bag culture material containing water