The aim of the invention is to create a fundamentally new method of the substrate production, which would include the following: the processing of the parent materials, containing lignocellulose (for example, straw), by applying the methods of the primary processing (for example, steam explosion) in order to decompose the said parent material into the lower-level components possible removal of the carbohydrates of the group C5 from the processed mass of lignocellulose extrusion, pasteurization and sterilization of the initial substrate adding of the components to the wetted initial substrate, its enrichment of materials necessary the growth of the mycelium and mushrooms undersowing of the mycelium and its stirring in the volume of the prepared substrate. The selectivity and resistance of the substrate to diseases can be improved by inoculating and incubating the mass of ligninocellulose, (processed by the aforementioned methods) with thermophilic fungi, the development thereof corresponds to the optimum temperature of 45° C. The amount of the useful derivatives / complexes of cellulose and hemicellulose is approximately two times larger in the substrate produced by using the new method in comparison the substrate which is produced by applying the conventional composting method the preparation process of the new substrate is significantly shorter during the preparation of the new substrate lignocellulose is broken down artificially up to the desired level of degradation after the processing, lignocellulose absorbs water significantly better. It is possible to dry, compact the subtract, also to prepare it for transportation and / or storing.Linvention a pour objet un procédé fondamentalement nouveau de production de substrat, qui comprend les opérations suivantes : le traitement des matériaux parents, contenant de la lignocellulose (par exemple de la paille), par application des procédés de traitement primaire (par exemple la fragmentation par la vapeur) afin de décom
