Palm Press Fibre and Rice Straw for Cultivation Grey Oyster Mushroom (Pleurotus sajor-caju)

Sawdust (SD) usually sourced from rubber plant is commonly used as substrate to cultivate the grey oyster mushroom Pleurotus sajor-caju in Malaysia. However, market price of SD increasing because its declining availability. Thus, this study aimed discover an alternative mushroom. The raw materials were oil palm pressed fiber (PPF), rice straw (RS) and SD, either alone or combination with different ratios including T1: 90% + 10% bran (commercial control); T2: 30% RS 20% 50% PPF; T3: T4: 100% RS; T5: PPF. suitability substrates was determined based on growth, yield, nutrition mineral content mushrooms. growth yield fruiting body showed significant differences. shortest harvesting day obtained T4 (100% RS) after 29 days, whereas longest T1 (90% bran) 51 days. highest T4. Nutrition analysis difference among treatments. amounts protein (26%) ash (1.29%) found T5. Overall, results that performance good but nutritional Therefore, PPF have impact for growers commercial production functional food industry reduce dependency.