The present invention relates to the use of a base modified biomass as bedding for animals in a stable, wherein said base modified biomass is obtainable by a process comprising the following processing steps: i) providing an amount of stems originating from one or more plant species； ii) subjecting said stems originating from one or more plant species to a cutting operation in order to obtain an amount of length reduced stems； iii) optionally subjecting said length reduced stems to a milling operation in order to obtain an amount of stem meal； iv) subjecting said length reduced stems or stem meal to a pressing operation in order to obtain an amount of compressed biomass； v) cooling said compressed biomass in order to obtain an amount of compressed biomass pellets； vi) subjecting said compressed biomass pellets to a roller operation in order to obtain an amount of said base modified biomass； characterized in that said biomass originating from one or more plant species furthermore at a point during the processing steps i) to vi) is subjected to a base treatment. The invention furthermore relates to a feedstock for use as feeding in a biogas reactor, said feedstock resulting from the use according to the invention and comprises a base modified biomass and manure from one or more animals.
