碳氮比(C/N)是指食用菌培养料中碳源和氮源适当浓度的比值。一般认为在营养生长阶段碳氮比以20:1为宜;子实体生长发有期碳氮比以30—40:1 为好。食用菌种类及培养材料不同,对碳氮比的要求也不同。如蘑菇在菌丝生长阶段堆制原料时的碳氮比为 33:1;子实体分化和发育期的最适大氮比为 17:1;草菇的碳氮比为40—60:1;香菇本屑培养料为 C / N ratio refers to the ratio of appropriate concentration of carbon source and nitrogen source in the edible fungus culture material. Generally believed that the ratio of carbon to nitrogen in the vegetative growth stage to 20: 1 is appropriate; fruiting body growth period of carbon to nitrogen ratio of 30-40: 1 is better. Edible mushroom species and culture materials are different from the requirements of carbon and nitrogen are also different. For example, the ratio of C: N was 33: 1 when the raw material was piled in the mycelium growth stage, the optimum ratio of nitrogen to nitrogen was 17: 1 during the differentiation and development of fruiting bodies, and the ratio of carbon to nitrogen was 40-60: 1. Mushroom crumbs training material for