Comparative Study on Nutritional Composition of Oyster Mushroom (Pleurotus ostreatus Fr.) Cultivated on Different Sawdust Substrates

Abstract

Effects of various sawdust substrates, namely Fig tree (T₂), Rain Tree (T₃), Mahogany tree (T₄), Ipil ipil tree (T₅), Eucalyptus tree (T₆) and mixture of all sawdust (T₁), supplemented with 30% wheat bran and 1% lime were analyzed on the growth and nutritional composition of Pleurotus ostreatus mushroom. The highest amount of carbohydrate (42.36%), calcium (31.98 mg/100g) and magnesium (19.85 mg/100g) were found in the T4 sawdust substrate treated mushrooms. Whereas, moisture (90.20%), ash (13%), phosphorous (0.91%) and molybdenum (14.76 mg/100g) were highest for the T₁ substrate treated mushrooms. The highest amount of dry matter (10.53%), lipid (4.46%), nitrogen (4.52%), iron (42.55 mg/100g), zinc (27.65 mg/100g) and selenium (6.77 mg/100g) were obtained for T2 substrate treatment. The highest amount of crude fiber (20.53%) and the lowest lipid (3.43%) was found for T6 substrate. Protein (27.30%) and potassium (1.28%) were found to be highest for T₅ substrate treatment. However, the highest level of cobalt (22.40 mg/100g) was found for T₃ substrate treatment. Among all aspects, best nutritional composition containing mushroom was grown on T₂ sawdust substrate, followed by T₁, T₅, T₆, T₃ and T₄.