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碳氮比（C／N）是指食用菌培养料中在源和民源的比值。一般认为在营养生长阶段成氨比以20：1为宜；子实体生长发育期成拉比以30－40：1为佳。食用菌种类及培养材料不同，对碳氢比的要求也不同。如蘑菇在菌丝生长阶段堆制原料时的联次比为33：1、子实体分化和发育期的最适在双比
C / N ratio refers to the ratio between source and source in edible fungus culture material. Generally considered in the vegetative growth stage ammonia ratio of 20: 1 is appropriate; fruiting body growth and development of rabbits to 30-40: 1 is better. Edible mushroom species and culture materials are different, the requirements of the hydrocarbon ratio is also different. Such as mushrooms in the mycelial growth phase of raw materials when the combination of the ratio of 33: 1, fruiting body differentiation and development of the most suitable in the double than