Pertumbuhan Miselium Bibit F2 Jamur Tiram Putih (Pleurotus Ostreatus) Dan Jamur Merang (Volvariella Volvaceae) Pada Media Eceng Gondok (Eichhornia Crassipes) Dan Media Kardus

F2 seeds were derivatives of original F1 seeds that grown on a medium that contains cellulose. Water hyacinth and cardboard contain cellulose, hemicelluloses, and lignin that can be used as F2 breeding innovation medium and mycelium growth of oyster mushroom and straw mushroom. This research was to know the mycelium F2 seeds growth of white oyster mushroom and straw mushroom by using medium of water hyacinth and cardboard. Water hyacinth was the most optimal medium in the mycelium growth. This research used the experimental method by using completely random design (CRD) factorial pattern that was implemented in two repetitions. Factor 1, types of medium: M1 (cardboard 100g, M2 (water hyacinth 100g). Factor 2, F1 seeds : J1( F1 seeds of oyster mushroom), J2 (F1 seeds of straw mushroom). The parameters measured were the length of mycelium, the dispersion, and the mycelium’s thickness on the oyster mushroom and straw mushroom. The analysis technique used quantitative descriptive analysis. Based on the results showed that the highest growth of mycelium F2 seeds of oyster mushroom and straw mushroom can be found on the use of water hyacinth medium that was 7 cm/day, the dispersion of mycelium was quite thick and tightly, the thicknesses grew in medium level. The cellulose content influenced the mycelium growth. However, the results of mycelium growth of F2 seeds of oyster mushroom and straw mushroom are the lowest in the use of cardboard medium that only 4 cm/day, the dispersion of mycelium was in medium level and irregular.