A B S T R A C T The purpose of the study was the identification of competitive substrate formulas to sustain Pleurotus eryngii cultivation, in Romania, in order to recover some cellulolytic wastes easy to procure in rural areas. The experiments conducted in a laboratory greenhouse followed the basidioma size, the productivity and the biological efficiency to use the substrate. Following the addition of rice breach and pumpkin seed husk in beech sawdust, were obtained the highest values, in average by one third higher as against the hay addition values. Although, it favored the fructification, it couldn't sustain a proper productivity that led to a scanty spawn maturation.
