a production method of a solid fiber mulching mat from a non - woody fiber is disclosed . the method includes the steps of providing a biopulp from a non - woody fiber plant , a polymer and a water ; mixing the biopulp , the polymer and the water for preparing a liquid fiber pulp of the non - woody fiber plant ; spreading the liquid fiber pulp of the non - woody fiber plant ; extruding and dehydrating the liquid fiber pulp ; and drying the liquid fiber pulp so as to form the solid fiber mulching mat .