A water-storage material, comprising a flat biodegradable carrier material and a water absorber in particle form, the particles of said water absorber being fixed in position on the carrier material in an evenly distributed fashion. The said particles of said water absorber are fixed on said carrier material by means of a biodegradable, hydrophilic adhesive agent, said carrier material comprising a polypeptide and/or PVA and a plasticizer, and said water absorber material comprises a superabsorber material.
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