Effect of calcium carbonate on the fruit-body development of the early-ripening variety of Hypsizygus marmoreus

Abstract

　Using an early-ripening strain (Marbure 88-8) of Hypsizygus marmoreus (Peck) Bigelow, the effects of the addition of three kinds of materials (powders of CaCO₃, scallop shell and egg shell) chiefly containing calcium carbonate, on the production and quality of fruit-bodies were examined. As a result, fruiting period was reduced, and fruit-body production was promoted by 10-70% with increasing addition of the CaCO₃ materials, although abnormal stipe elongation was often observed. These results suggest that the addition of CaCO₃ materials to the substrate is effective for the cultivation of early-ripening strains of H. marmoreus.