Lesser khingan mountain cold region indigenous plant composite fungus grass and application thereof in cultivation of black fungus

The invention relates to the technical field of edible fungus cultivation, in particular to a Lesser Khingan mountain cold region indigenous plant composite fungus grass and application thereof in black fungus cultivation. The Lesser Khingan Mountain cold region indigenous plant composite fungus grass is composed of burdock, ligularia purdomii, melilotus albiflora, rumex plicatus and chaphania segetalis according to a mass ratio of 2: 2: 2: 3: 1. The method for cultivating the black fungus by adopting the composite fungus grass comprises the following steps: (1) pre-treating the composite fungus grass: pre-wetting and fermenting; (2) preparing a planting culture material, and carrying out cultivation by adopting a black fungus greenhouse bag hanging cultivation method; wherein the formula of the planting culture material comprises 50% of composite fungus grass, 10% of oak leaves, 24% of sawdust, 12% of bran or rice chaff, 2.5% of bean flour, 0.5% of gypsum and 1% of lime. By adopting the method for producing