摘要:
不同菌种对液体培养基中营养物质的利用效率不同, 试验以香菇0912作为供试菌株, 以菌丝体干质量为指标, 通过单因素试验, 研究了不同碳氮源、无机盐含量、转速、培养基初始pH、静置时间以及培养基装液量对香菇菌丝干质量的影响, 结果表明最佳碳源为葡萄糖, 最佳氮源为玉米浆, K2HPO4的最佳用量为0.1%, KH2PO4的最佳用量为0.1%, 初始pH值5.0, 装液量为50 mL, 培养温度为25°C, 静置时间为24 h, 转速为180 r·min-1.在此基础上, 对液体培养基的组分含量进行了L9 (34) 正交试验, 结果表明4个因素对香菇菌丝干质量的影响表现为:葡萄糖>玉米浆>KH2PO4>K2HPO4, 其中葡萄糖和玉米浆的含量对菌丝干质量具有极显著影响 (Pcorn pulp> KH2PO4>K2HPO4, in which the content of glucose and corn pulp had a significant effect on the dry weight of mycelium (P<0.01) , and the optimum conditions for liquid deep fermentation of L.edodes strain 0912 were glucose 3%, corn pulp 0.3%, K2HPO40.05%, KH2PO40.05%, matched with MgSO40.05% and VB10.005%, the dry weight of mycelium could reach 2.103 g·L-1, which was 1.49 times of that before optimization (1.417 g·L-1).